Std English ACOL

Default principles
Offensive bidding
Bidding diagrams
1♣          11-19* Rule of 20 applies
 1♦        6+ HCP typically
  1♥       4+ 11*-19 pts any shape
   1♠      6+ HCP
    1NT     15-16 balanced
     2NT    
      3NT   To Play
     3NT    
     4NT    Blackwood
    2♣     5-4 or better min hand 11-14
     2♥    To play
     2♠    Fourth Suit Forcing
     2NT    
      3NT   To play
     3♥    
     3NT    
     4♥    
    2♦     Min hand 4441 shape or better
     2NT    
     3NT    
     4NT    Blackwood
    2♥     6-5 shape min hand
     2NT    
     3♥    
     3NT    
     4♥    
     4NT    Blackwood
    2♠     Min hand 4441 shape
     3♠    
     4♣    
     4♦    
     4♥    
     4♠    
     4NT    Blackwood
    2NT     17-18 balanced inv to 3NT
     3NT    
     4NT    Blackwood
    3♣     5-4-22 or better good hand
     3NT    
     4NT    Blackwood
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
     3♠    
     3NT    
     4♣    
     4♦    
     4♥    
     4NT    Blackwood
     5♣    
     5♦    
    3♥     6♣-5♥ or better shape good hand
     3♠    
     3NT    
     4♣    
     4♦    
     4♥    
     4NT    Blackwood
    3♠     4144 shape or better 15-18pts
     3NT    
     4♣    
     4♦    
     4♥    
     4♠    
     4NT    Blackwood
    3NT     19points
   1NT      6-9 HCP
    2♣     6-4 weak
     2♦    No fit
     2♥    Preference
    2♦     11-14
    2♥     6-5 weak hand
     2NT    
     3♣    Preference
     3♥    
     4♥    
    2♠     Fourth Suit forcing asking ptr to descride hand further
    2NT     17-18 bal
    3♣     6-4 or better 15+HCP
    3♦     15-17pts shortage in ♠
    3♥     6-5 15+ HCP
    3♠     Fourth Suit forcing
    3NT     19pts to play
   2♣      6-9 HCP Preference
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♦      6-9pts
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      6-9pts
    2♠     Fourth Suit forcing
    3♥     
   2♠      4TH Suit forcing -asks ptr for more information
    2NT     4th Suit stopped Min hand
    3♣     6+-4+ shape Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     6-5 shape no 4th suit stop
    3♠     Strong hand no stop in 4th suit
    3NT     15-16 4th suit stopped
    4♣     6-4 or better shape No 4th suit stop strong hand
   2NT      11-12pts balanced
   3♣      10-11pts
   3♦      No support for ptr 12+HCP
   3♥      10-12 HCP
   3♠      13+ HCP 4th Suit Forcing
   3NT      13-15 HCP
   4NT      Blackwood
  1♠       4+ 11*-19 pts any shape
   1NT      6-9 HCP
    2♣     6-4 weak
    2♦     11-14
    2♥     Fourth Suit Forcing
    2♠     6-5 Weak Hand
    2NT     17-18 bal
    3♣     6-4 or better 15+HCP
    3♦     15-17pts shortage in ♥
    3♥     Fourth Suit Forcing
    3♠     6-5 Good hand
    3NT     19pts to play
   2♣      6-9 HCP Preference
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♦      6-9pts
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      4TH Suit forcing -asks ptr for more information
    2♠     6-5 shape min hand
    2NT     4th Suit stopped Min hand
    3♣     6+-4+ shape Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     6-5 shape no 4th suit stop
    3♠     Strong hand no stop in 4th suit
    3NT     15-16 4th suit stopped
    4♣     6-4 or better shape No 4th suit stop strong hand
   2♠      6-9pts
    3♥     Long Suit game try
    3♠     17-18pts
    3NT     18-19 bal game choice
    4♣     
    4♦     
    4♥     
    4♠     
    4NT     Blackwood
   2NT      11-12pts balanced
    3NT     
    4NT     Blackwood
   3♣      10-11pts
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4♣     
    4♦     
    4♥     
    4♠     6-5 Slam Try
    4NT     Blackwood
    5♣     To Play
   3♦      No support for ptr 12+HCP
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4NT     Blackwood
   3♥      10-12 HCP
   3♠      13+ HCP 4th Suit Forcing
   3NT      13-15 HCP
   4NT      Blackwood
  1NT       15-16 balanced
   2♣      6-7pts
   2♦      6-7pts
   2♥      Strong Reverse 16+ pts
   2♠      Strong Reverse 16+ pts
   2NT      8-9pts
   3♣      10-11pts
   3♦      
    3♥     Stopper Showing - expressing doubt about ♠
    3♠     Stopper Showing - expressing doubt about ♥
    3NT     To play
   3♥      Stopper Showing - expressing doubt about ♠
   3♠      Stopper Showing - expressing doubt about ♥
   3NT      To Play
   4NT      Blackwood
  2♣       No 4 Card major weak hand 11-14
   2♦      6-9pts
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      Strong Reverse 16+ pts
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      Strong Reverse 16+ pts
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      10-11pts
   3♦      No support for ptr 12+HCP
   3♥      10-12 HCP
   3♠      13+ HCP 4th Suit Forcing
   3NT      13-15 HCP
   4NT      Blackwood
  2♦       11-14HCP unbalanced
  2♥       17+HCP strong jump shift
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP semi - forcing
  3♦       4 Card Support 16+HCP semi - forcing
   3♥      Asking for ♥ stop for 3NT
   3♠      Asking for ♠ stop for 3NT
   3NT      
  3♥       Stopper showing concern about spades
  3♠       Stopper showing concern about hearts
  3NT       19HCP Balanced
  4NT       Blackwood
 1♥        6+ HCP typically
  1♠       4+ 11*-19 pts any shape
   1NT      6-9 HCP
    2♣     6-4 weak
    2♦     4th Suit Forcing
    2♥     3 card preference weak hand 11-14
    2♠     6-5 Weak Hand
    2NT     17-18 bal
    3♣     6-4 or better 15+HCP
    3♦     Fourth Suit Forcing
    3♥     Invitational to 3NT/4♥
    3♠     6-5 Good hand
    3NT     18-19pts to play
   2♣      6-9 HCP Preference
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♦      4th Suit Forcing
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      6-9
    2♠     6-5 shape min hand
    2NT     4th Suit stopped Min hand
    3♣     6+-4+ shape Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand no stop in 4th suit
    3♠     6-5 Good hand
    3NT     15-16 4th suit stopped
    4♣     6-4 or better shape No 4th suit stop strong hand
   2♠      6-9pts
    3♥     Long Suit game try
    3♠     17-18pts
    3NT     18-19 bal game choice
    4♣     
    4♦     
    4♥     
    4♠     
    4NT     Blackwood
   2NT      11-12pts balanced
    3NT     
    4NT     Blackwood
   3♣      10-11pts
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4♣     
    4♦     
    4♥     
    4♠     6-5 Slam Try
    4NT     Blackwood
    5♣     To Play
   3♦      4th Suit Forcing
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4NT     Blackwood
   3♥      10-12 HCP
   3♠      Limit raise
   3NT      13-15 HCP
   4♣      
   4♦      
   4♥      Single suited 13-17 HCP
   4♠      12-17pts
   4NT      Blackwood
  1NT       15-16 balanced
   2♣      6-7pts
   2♦      6-7pts
   2♥      6-9
   2♠      Strong Reverse 16+ pts
   2NT      8-9pts
   3♣      10-11pts
   3♦      Strong Reverse 16+HCP
    3♥     Stopper Showing - expressing doubt about ♠
    3♠     Stopper Showing - expressing doubt about ♥
    3NT     To play
   3♥      Strong hand 6+♥
   3♠      Stopper Showing - expressing doubt about ♥
   3NT      To Play
   4NT      Blackwood
  2♣       weak hand 11-14
   2♦      6-9pts 5+♥
    2♥     5+♣-3♥ shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     11-14 pts
    3♦     5+♣ -4+♦ Inv to 3NT not likely to hold ♠ Stop
    3♥     5+♣ 3♥ 17-18pts inv to 3NT/4♥
    3♠     4th suit forcing strong hand
    3NT     19points ♠ stopped
    4NT     Blackwood
   2♥      6-9pts
    2♠     6♣ 4+♠ ♦ stop unlikely
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     6♣ 5♦ good hand no ♠ stop likely
    3♥     Inv to 3NT / 4♥
    3♠     Stopper showing asking for ♦ stop
    3NT     To Play
    4♣     6+ strong hand
   2♠      Strong Reverse 16+ pts
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     4th Suit Forcing
    3♥     3♥ min 11-14 hand
    3♠     3♠ not 3♥ ♦s likely stopped
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      10-12pts mild game try
   3♦      Strong Reverse 16+HCP 5+♥
   3♥      10-12 HCP
   3♠      Stopper showing
   3NT      13-15 HCP
   4NT      Blackwood
  2♦       17+ unbalanced
   2♥      6-9pts
   2♠      4th Suit Forcing
   2NT      6-9 Bal 4th suit Stopped
   3♣      6-7pts
   3♦      6-7pts
   3♥      10+pts
   3♠      
   3NT      To play
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  2♥       11-14
   2♠      Long Suit Game try
   2NT      Bal 11-12 inv. to 3NT/4♥
   3♣      Game try - secondary fit
   3♦      Long Suit game-try
   3♥      11-12pts typically
   3♠      
   3NT      To play
   4♣      
   4♦      
   4♥      
   4NT      Blackwood
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP
  3♦       Strong Jump Shift 17+HCP
  3♥       16-17pts 4+♣ 4+♥
  3♠       Stopper showing concern about diamonds
  3NT       19HCP Balanced
  4NT       Blackwood
 1♠        6+ HCP typically
  1NT       15-16 balanced
   2♣      6-7pts
   2♦      6-7pts
   2♥      Strong Reverse 16+ pts
   2♠      Strong Reverse 16+ pts
   2NT      8-9pts
   3♣      10-11pts
   3♦      
    3♥     Stopper Showing - expressing doubt about ♠
    3♠     Stopper Showing - expressing doubt about ♥
    3NT     To play
   3♥      Stopper Showing - expressing doubt about ♠
   3♠      Stopper Showing - expressing doubt about ♥
   3NT      To Play
   4NT      Blackwood
  2♣       No 4 Card major weak hand 11-14
   2♦      6-9pts
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      Strong Reverse 16+ pts
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      Strong Reverse 16+ pts
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      10-11pts
   3♦      No support for ptr 12+HCP
   3♥      10-12 HCP
   3♠      13+ HCP 4th Suit Forcing
   3NT      13-15 HCP
   4NT      Blackwood
  2♦       11-14HCP unbalanced
  2♥       17+HCP
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP
  3♦       4 Card Support 16+HCP
  3♥       Stopper showing concern about spades
  3♠       Stopper showing concern about hearts
  3NT       19HCP Balanced
  4NT       Blackwood
 1NT        6-9 Balanced no 4 Card Major
  2♣       No 4 Card major weak hand 11-14
  2♦       Strong Jump Shift 17+HCP
  2♥       Strong Jump Shift 17+HCP
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP
  3NT       19HCP Balanced
 2♣        6-9 Unbalanced
 2♦        Strong Jump Shift 16+HCP
 2♥        Strong Jump Shift 16+HCP
 2♠        Strong Jump Shift 16+HCP
 2NT        11-12pts balanced no 4 card major
 3♣        10-11 pts no 4 Card Major
  3♦       Asking for ♦ stop for 3NT
  3♥       Asking for ♥ stop for 3NT
  3♠       Asking for ♠ stop for 3NT
  3NT       To play 15-19 bal
 3NT        13-15pts balanced
 4NT        Blackwood

1♦          11-19* Rule of 20 applies
 1♥        6+ HCP typically
  1♠       4+ 11*-19 pts any shape
   1NT      6-9 HCP
    2♣     6-4 weak
    2♦     4th Suit Forcing
    2♥     3 card preference weak hand 11-14
    2♠     6-5 Weak Hand
    2NT     17-18 bal
    3♣     6-4 or better 15+HCP
    3♦     Fourth Suit Forcing
    3♥     Invitational to 3NT/4♥
    3♠     6-5 Good hand
    3NT     18-19pts to play
   2♣      4th Suit Forcing
    2♥     3♥ min hand
    2♠     6-5 Min Hand
    2NT     ♣ stop 11-14 pts
    3♣     Shortage in ♥s likey 4-0-5-4 shape
    3♦     6-4 or better 15+pts no ♣ stop
    3♥     3♥ good hand
    3♠     6-5 Good hand 15+HCP
    3NT     15-16 ♣ stop
   2♦      6-9pts Preference
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      6-9 pts
    2♠     6-5 shape min hand
    2NT     4th Suit stopped Min hand
    3♣     6+-4+ shape Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand no stop in 4th suit
    3♠     6-5 Good hand
    3NT     15-16 4th suit stopped
    4♣     6-4 or better shape No 4th suit stop strong hand
   2♠      6-9pts
    3♥     Long Suit game try
    3♠     17-18pts
    3NT     18-19 bal game choice
    4♣     
    4♦     
    4♥     
    4♠     
    4NT     Blackwood
   2NT      11-12pts balanced
    3NT     
    4NT     Blackwood
   3♣      Fourth Suit Forcing
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4♣     
    4♦     
    4♥     
    4♠     6-5 Slam Try
    4NT     Blackwood
    5♣     To Play
   3♦      10-11pts
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4NT     Blackwood
   3♥      10+ HCP
   3♠      Limit raise
   3NT      To Play
   4♣      
   4♦      
   4♥      Single suited 13-17 HCP
   4♠      12-17pts No slam Interest
   4NT      Blackwood
  1NT       15-16 balanced
   2♣      5+♥ 4+♣ no ♦ fit unbalanced 6-8pts
   2♦      4+♥ 4+♦ weak hand likely unbalanced
   2♥      6-7pts weak normally 6+ may be 5
   2♠      Strong Reverse 16+ pts
   2NT      8-9pts
   3♣      Strong Reverse 16+HCPs
   3♦      Limit Raise 10-11pts
    3♥     Stopper Showing - expressing doubt about ♠
    3♠     Stopper Showing - expressing doubt about ♥
    3NT     To play
   3♥      Strong hand 6+♥
   3♠      Stopper Showing - expressing doubt about ♣
   3NT      To Play
   4NT      Blackwood
  2♣       weak hand 11-14 5+♦
   2♦      6-9pts 5+♥
    2♥     5+♣-3♥ shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     11-14 pts
    3♦     5+♣ -4+♦ Inv to 3NT not likely to hold ♠ Stop
    3♥     5+♣ 3♥ 17-18pts inv to 3NT/4♥
    3♠     4th suit forcing strong hand
    3NT     19points ♠ stopped
    4NT     Blackwood
   2♥      6-9pts
    2♠     6♣ 4+♠ ♦ stop unlikely
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     6♣ 5♦ good hand no ♠ stop likely
    3♥     Inv to 3NT / 4♥
    3♠     Stopper showing asking for ♦ stop
    3NT     To Play
    4♣     6+ strong hand
   2♠      4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     5+-5 shape hand no ♠ stop
    3♦     6-4+ shape no Spade stop no 3 card support for ♥
    3♥     3♥ min 11-14 hand
    3♠     3♠ not 3♥ ♦s likely stopped
    3NT     15+HCP 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      10-12pts mild game try
   3♦      Game Try showing doubt about ♠ stop
   3♥      12+ HCP Game try
   3♠      Stopper showing
   3NT      13-15 HCP
   4NT      Blackwood
  2♦       12-14 Unbalanced no 4 card major
   2♥      6-9pts
   2♠      Strong Reverse 16+HCP
    3♣     Fourth Suit Forcing
   2NT      6-9 Bal 4th suit Stopped
   3♣      Strong Reverse 16+HCP
   3♦      12+HCP unlikely to have ♣ stop
   3♥      Strong hand 6+♥
   3♠      ♠ Stop asking about ♣ stop for NT
   3NT      To play
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  2♥       11-14
   2♠      Long Suit Game try
   2NT      Bal 11-12 inv. to 3NT/4♥
   3♣      Long Suit game try
   3♦      Long Suit game-try
   3♥      11-12pts typically
   3♠      
   3NT      To play
   4♣      
   4♦      
   4♥      
   4NT      Blackwood
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP
  3♦       16+HCP No 4 card major
  3♥       16-17pts 4+♦ 4+♥
  3♠       Stopper showing concern about ♣
  3NT       19HCP Balanced
  4NT       Blackwood
 1♠        6+ HCP typically
  1NT       15-16 balanced
   2♣      6-7pts
   2♦      6-7pts
   2♥      Strong Reverse 16+ pts
   2♠      Strong Reverse 16+ pts
   2NT      8-9pts
   3♣      10-11pts
   3♦      
    3♥     Stopper Showing - expressing doubt about ♠
    3♠     Stopper Showing - expressing doubt about ♥
    3NT     To play
   3♥      Stopper Showing - expressing doubt about ♠
   3♠      Stopper Showing - expressing doubt about ♥
   3NT      To Play
   4NT      Blackwood
  2♣       No 4 Card major weak hand 11-14
   2♦      6-9pts
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      Strong Reverse 16+ pts
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      Strong Reverse 16+ pts
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      10-11pts
   3♦      No support for ptr 12+HCP
   3♥      10-12 HCP
   3♠      13+ HCP 4th Suit Forcing
   3NT      13-15 HCP
   4NT      Blackwood
  2♦       11-14HCP unbalanced
  2♥       17+HCP
  2♠       Min hand
  2NT       17-18pts balanced no 4 card major
  3♣       Reverse 5+♦ 16+ HCP
  3♦       16+HCP
  3♥       Stopper showing concern about ♣s
  3♠       15-16pts
  3NT       19HCP Balanced
  4NT       Blackwood
 1NT        6-9 Balanced no 4 Card Major
  2♣       No 4 Card major weak hand 5+♦ 11-14
  2♦       11-14 pts
  2♥       Strong Jump Shift 17+HCP
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP
  3♦       Invitational to 3NT shows 16+HCP long ♦ suit
  3NT       19HCP Balanced
 2♣        9+ HCP
 2♦        6-9pts no 4 card major
  2NT       
 2♥        Strong Jump Shift 16+HCP
 2♠        Strong Jump Shift 16+HCP
 2NT        11-12pts balanced no 4 card major
 3♣        Strong Jump Shift 16+HCP
 3♦        10-11pts No 4 card major
  3♥       Asking for ♥ stop for 3NT
  3♠       Asking for ♠ stop for 3NT
  3NT       To play 15-19 bal
 3NT        13-15pts balanced
 4NT        Blackwood

1♥          11-19* Rule of 20 applies
 1♠        6+ HCP typically
  1NT       15-16 balanced
   2♣      6-7pts
    2♠     
    2NT     
   2♦      6-7pts
    2♠     
   2♥      Weak raise 6-9pts unbalanced
    2♠     
   2♠      5+♠ likely 6 weak hand
   2NT      8-9pts
    3♠     
    3NT     
   3♣      13+HCP likely 5+♠/4+♣
    3♠     
    3NT     
    4♦     
    4♠     
   3♦      13+HCP likely 5+♠/4+♦
    3♠     
    3NT     To play
   3♥      3+♥ forcing to 3NT/4♥
   3♠      Long Spade suit 12+HCPs
   3NT      To Play
   4♣      
   4♦      
   4♥      
   4♠      One suited hand to play
   4NT      Blackwood
  2♣       5+♥ 4+♣ weak hand 11/12-14
   2♦      Fourth Suit Forcing
    2♥     6-5 shape min hand
    2♠     Min hand
    2NT     ♦ stopped min hand 11-14 pts
    3♣     No ♦ stop 5-5 shape or better
    3♦     5422 hand no ♦ stop no 3♠s
    3♥     6♣-5♥ or better shape good hand
    3♠     3♠ max hand 14/15 pts
    3NT     14pts ♦s stopped
   2♥      Preference
    2♠     
    3♣     14HCPs 6-5 Shape inv to 4♥ forcing to 3♥
    3♥     Inv to 4♥ extra shape
    3♠     Inv to 4♥/4♠ likely ♦ singleton/void
    4♣     6+ strong hand
   2♠      No tolerance for ♣/♥
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand 5-5 or better
    3♥     6-4 shape or better
    3♠     
    3NT     
   2NT      11-12pts balanced
    3♣     5-5 no ♠ tolerance and ♦ shortage
    3♥     
    3♠     
    3NT     To Play
   3♣      Looking for 3NT if max and with ♦ stop
    3♦     FSF max hand but no ♦ stop
    3♥     6-5hand looking for ♥ or ♣ game
    3♠     Max hand 3♠ no ♦ stop
    3NT     Max hand ♦s stopped
   3♥      10-12 HCP
   3♠      
   3NT      13-15 HCP
   4♥      1♠ was delayed Game Raise 13+HCP
   4NT      Blackwood
  2♦       5+♥ 4+♦ 11-14HCP unbalanced
   2♥      Preference
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      No tolerance for ♦/♥
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      Fourth Suit forcing
    3♦     FSF max hand but no ♦ stop
    3♥     6-5hand looking for ♥ or ♣ game
    3♠     Max hand 3♠ no ♦ stop
    3NT     Max hand ♦s stopped
   3♦      Looking for 3NT or 5D if max denies ♣ stop
   3♥      10-12 HCP
   3♠      
   3NT      13-15 HCP
   4♥      To Play 13+HCP 1♠ was delayed game raise
   4♠      
   4NT      Blackwood
  2♥       Weak hand no 4 card minor
   2♠      0 or 1 ♥ weak hand
   2NT      Inv to 3NT
   3♣      5+♠ 4+♣ 13+HCP
   3♦      5+♠ 4+♦ 13+HCP
   3♥      
   3♠      Semi Forcing 12-13pt hand no ♥ support
   3NT      TO PLAY
  2♠       5+♥ 4+♠ weak hand
  2NT       17-18pts balanced
   3♥      
   3♠      
   3NT      
   4NT      Blackwood
  3♣       Strong suit 16+ HCP
   3♦      fourth suit forcing
   3♥      
   3♠      
   3NT      
   4♣      
   4♥      
  3♦       16+HCP semi-forcing
   3♥      
   3♠      
   3NT      
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3♥       16+HCP semi-forcing
  3♠       5+♥ 4+♠ Inv to 4♥/4♠
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3NT       19HCP Balanced to play
  4♣       
  4♦       
  4♥       Strong one-suited hand 18-19pts
  4♠       5+♥ 4+♠ 18-19pts
  4NT       Blackwood
 1NT        6-9 Balanced no 4 Card Major
  2♣       weak hand 11-14
  2♦       weak hand 11-14
  2♥       weak hand 11-14
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced
  3♣       Strong suit 16+ HCP
  3♦       Strong suit 16+ HCP
  3♥       
  3NT       19HCP Balanced
 2♣        9+ Unbalanced
  2♦       5+♥ 4+♦ 11-14HCP unbalanced
   2♥      Preference
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      No tolerance for ♦/♥
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      Fourth Suit forcing
    3♦     FSF max hand but no ♦ stop
    3♥     6-5hand looking for ♥ or ♣ game
    3♠     Max hand 3♠ no ♦ stop
    3NT     Max hand ♦s stopped
   3♦      Looking for 3NT or 5D if max denies ♣ stop
   3♥      10-12 HCP
   3♠      
   3NT      13-15 HCP
   4♥      To Play 13+HCP 1♠ was delayed game raise
   4♠      
   4NT      Blackwood
  2♥       Weak hand no 4 card minor
   2♠      0 or 1 ♥ weak hand
   2NT      Inv to 3NT
   3♣      5+♠ 4+♣ 13+HCP
   3♦      5+♠ 4+♦ 13+HCP
   3♥      
   3♠      Semi Forcing 12-13pt hand no ♥ support
   3NT      TO PLAY
  2♠       Strong Reverse 16+ 5+♥s
  2NT       17-18pts balanced
   3♥      
   3♠      
   3NT      
   4NT      Blackwood
  3♣       Invitational looking for ♥/♣ or 3NT 5+♥s
   3♦      fourth suit forcing
   3♥      
   3♠      
   3NT      
   4♣      
   4♥      
  3♦       16+HCP
   3♥      
   3♠      
   3NT      
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3♥       16+HCP semi-forcing
  3NT       19HCP Balanced to play
  4♣       
  4♦       
  4♥       Strong one-suited hand 18-19pts
  4♠       5+♥ 4+♠ 18-19pts
  4NT       Blackwood
 2♦        9+HCP
  2♥       Weak hand no 4 card minor
   2♠      0 or 1 ♥ weak hand
   2NT      Inv to 3NT
   3♣      5+♠ 4+♣ 13+HCP
   3♦      5+♠ 4+♦ 13+HCP
   3♥      
   3♠      Semi Forcing 12-13pt hand no ♥ support
   3NT      TO PLAY
  2♠       Strong Reverse 16+
  2NT       17-18pts balanced
   3♥      
   3♠      
   3NT      
   4NT      Blackwood
  3♣       Strong Reverse 16+HCP
   3♦      fourth suit forcing
   3♥      
   3♠      
   3NT      
   4♣      
   4♥      
  3♦       Invitational looking for ♥/♦ or 3NT
   3♥      
   3♠      
   3NT      
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3♥       16+HCP
  3NT       19HCP Balanced to play
  4♣       
  4♦       
  4♥       Strong one-suited hand 18-19pts
  4♠       5+♥ 4+♠ 18-19pts
  4NT       Blackwood
 2♥        6-9pts
  2♠       Long Suit game-try
  2NT       17-18 4333 shape
  3♣       Long Suit game-try
  3♦       Long Suit game-try
  3♥       
  4♥       
 2♠        Strong Jump Shift 16+HCP
  2NT       15-16 bal not 4 spades
  3♣       Weak hand 5+♥/4+♣ not 4♠
  3♦       Weak hand 5+♥/4+♦ not 4♠
  3♥       Weak hand6+♥ no 4+♣/♦ not 4♠
  3♠       Strong hand (slow arrival)
  3NT       17/18 balanced
 2NT        11-12pts balanced no 4 card major
  3♣       Weak hand 5+♥/4+♣
  3♦       Weak hand 5+♥/4+♦
  3♥       
  3NT       
  4♥       
  4NT       Blackwood
 3♣        Strong Jump Shift 16+HCP
 3♦        Strong Jump Shift 16+HCP
 3♥        10-11pts Invitational
  4♥       
  4NT       Blackwood
 3NT        13-15pts balanced
 4NT        Blackwood

1♠          11-19* Rule of 20 applies
 1NT        6-9 Balanced no 4 Card Major
  2♣       weak hand 11-14
  2♦       weak hand 11-14
  2♥       weak hand 11-14
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced
  3♣       Strong suit 16+ HCP
  3♦       Strong suit 16+ HCP
  3♥       
  3NT       19HCP Balanced
 2♣        9+ Unbalanced
  2♦       5+♠ 4+♦ 11-14HCP unbalanced
   2♥      Preference
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      No tolerance for ♦/♥
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      Fourth Suit forcing
    3♦     FSF max hand but no ♦ stop
    3♥     6-5hand looking for ♥ or ♣ game
    3♠     Max hand 3♠ no ♦ stop
    3NT     Max hand ♦s stopped
   3♦      Looking for 3NT or 5D if max denies ♣ stop
   3♥      10-12 HCP
   3♠      
   3NT      13-15 HCP
   4♥      To Play 13+HCP 1♠ was delayed game raise
   4♠      
   4NT      Blackwood
  2♥       Weak hand no 4 card minor
   2♠      0 or 1 ♥ weak hand
   2NT      Inv to 3NT
   3♣      5+♠ 4+♣ 13+HCP
   3♦      5+♠ 4+♦ 13+HCP
   3♥      
   3♠      Semi Forcing 12-13pt hand no ♥ support
   3NT      TO PLAY
  2♠       Weak hand 11-14/15 5+♠ not 4♦/4♥
  2NT       15-16pts balanced
   3♥      
   3♠      
   3NT      
   4NT      Blackwood
  3♣       Weak hand
   3♦      fourth suit forcing
   3♥      
   3♠      
   3NT      
   4♣      
   4♥      
  3♦       16+HCP
   3♥      
   3♠      
   3NT      
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3♥       16+HCP semi-forcing
  3♠       
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3NT       17-18 Balanced to play
  4♣       
  4♦       
  4♥       Strong one-suited hand 18-19pts
  4♠       5+♥ 4+♠ 18-19pts
  4NT       Blackwood
 2♦        9+HCP
  2♥       Weak hand no 4 card minor
   2♠      0 or 1 ♥ weak hand
   2NT      Inv to 3NT
   3♣      5+♠ 4+♣ 13+HCP
   3♦      5+♠ 4+♦ 13+HCP
   3♥      
   3♠      Semi Forcing 12-13pt hand no ♥ support
   3NT      TO PLAY
  2♠       Weak 11-14 5+♠
  2NT       17-18pts balanced
   3♥      
   3♠      
   3NT      
   4NT      Blackwood
  3♣       Strong Reverse 16+HCP
   3♦      fourth suit forcing
   3♥      
   3♠      
   3NT      
   4♣      
   4♥      
  3♦       Invitational looking for ♥/♦ or 3NT
   3♥      
   3♠      
   3NT      
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3♥       16+HCP
  3NT       19HCP Balanced to play
  4♣       
  4♦       
  4♥       Strong one-suited hand 18-19pts
  4♠       5+♥ 4+♠ 18-19pts
  4NT       Blackwood
 2♥        9+pts
  2♠       Weak Hand
  2NT       15-16 Balanced
  3♣       Reverse 5+♠ 4+♣s 16+HCP
  3♦       Reverse 5+♠ 4+♦s 16+HCP
  3♥       5+♠ 4+♥s
  3♠       Strong hand
  3NT       17/18 HCP to play unless v.strong
  4♥       
 2♠        6-9pts
  2NT       15-16 bal not 4 spades
  3♣       Long Suit Game try
  3♦       Long Suit Game try
  3♥       Long Suit Game try
  3♠       
  3NT       17/18 balanced
  4♠       
  4NT       Blackwood
 2NT        11-12pts balanced no 4 card major
  3♣       Weak hand 5+♥/4+♣
  3♦       Weak hand 5+♥/4+♦
  3♥       
  3NT       
  4♥       
  4NT       Blackwood
 3♣        Strong Jump Shift 16+HCP
 3NT        13-15pts balanced
 4NT        Blackwood

1NT          12-14 balanced 4333,4432,5m332
 2♣        Stayman
  2♦       No 4 Card Major
   2♥      5♥ 4♠ <13pts to play
   2♠      5♠ 4♥ <13pts to play
   2NT      No Fit found Inv to 3NT
   3♣      weak implies a 4 card major
   3♦      6+ Diamonds implies a 4 card major
   3NT      
   4NT      Quantatative
  2♥       May have 4♠
   2NT      No Fit found Inv to 3NT
   3♣      weak implies a 4 card major
   3♦      6+ Diamonds implies a 4 card major
   3NT      To play likely to have 4♠s
   4NT      Quantatative
  2♠       Not 4♥
   2NT      No Fit found Inv to 3NT
   3♣      weak implies a 4 card major
   3♦      6+ Diamonds implies a 4 card major
   3NT      To play likely to have 4♥s
   4NT      Quantatative
 2♦        TFR to ♥
  2♥       
   2♠      5♥ 4♠ 11+HCP forcing to 2NT
   2NT      5♥s 11-poor 12 inv to 3♥,3NT,4♥
    3♥     
    3NT     
    4♥     
   3♣      Forcing to 3♥
    3♦     2♥s forcing
    3♥     No fit minimum hand
    3♠     4♠ only 2♥s
    3NT     Non-minimum values in unbid suits 2♥s
    4♣     4♥s,4♦s better than min
  3♥       Shows a maximum hand with doubleton somewhere
 2♥        TFR to ♠
 2♠        11-12 Bal no interest in ♥/♠ game may have 4CM if 4333.
 2NT        
 3♣        
  3♦       No fit for ♣s
  3♥       No fit for ♣s
  3♠       No fit for ♣s
  3NT       No fit for ♣s
  4♣       No other feature to show no o/s ace
  4♦       A♦ fit for ♣s
  4♥       A♥ fit for ♣s no A♦
  4♠       A♠ fit for ♣s no A♦ or A♥
 3♦        
  3♥       No fit for ♦s
  3♠       No fit for ♦s
  3NT       No fit for ♦s
  4♣       ♦ fit A♣
  4♦       ♦s No o/s ace to show
  4♥       A♥ fit for ♦s no A♣
  4♠       A♠ fit for ♦s no A♣ or A♥
 3♥        
  3♠       No fit for ♥s
  3NT       No fit for ♥s
  4♣       A♣ ♥ fit 3+
  4♦       A♦ ♥ fit 3+
  4♥       ♥ fit for ♣s no o/s ace
  4♠       A♠ ♥ fit 3+ no A ♦/♣
 3♠        
 3NT        13-18 to play
 4NT        Quantative 19-20pts
 5NT        Invite to 7NT forcing to 6NT 23-24HCP
 6NT        21-22 HCP to play
 7NT        To play

2♣          Strong Game Force 23+ HCP
 2♦        Negative
  2♥       
  2♠       
  2NT       20-22 Balanced 4432,4333,5332 ( may include 5 card major)
   3♣      Stayman
    3♦     No 4 Card Major
     3♥    Implies 4♠s
      3NT   
      4♥   
     3♠    Implies 4♥s
     3NT    Implies a 4 card major
     4♣    
     4♦    
    3♥     4+♥s
     3NT    
     4♥    
    3♠     4+♠s
     3NT    
     4♠    
   3♦      
   3♥      
   3NT      
   4NT      Quantatative
   5NT      Grand Slam try
  3♣       
  3♦       
  3NT       25+ Balanced
 2♥        8+pts 5+♥ good suit
 2♠        8+pts 5+♠ good suit
 2NT        8+ Balanced - Systems on
 3♣        8+pts 5+♣ good suit
 3♦        8+pts 5+♦ good suit
 3♥        Solid Suit
 3♠        Solid Suit
 4♣        Solid Suit
 4♦        Solid Suit

2♦          8 Playing tricks meets rule of 23 (HCP + Length of 2 longest suits)
 2♥        Suit as good as AQxxx 8+pts
 2♠        Suit as good as AQxxx 8+pts
 2NT        Negative 0-7pts
 3♣        Suit as good as AQxxx 8+pts
 3♦        At least one A or good trumps
 3♠        
 3NT        To Play
 4♣        At least one A or good trumps
 4♦        Denies an A but useful features o/s K or Singleton

2♥          8 Playing tricks meets rule of 23 (HCP + Length of 2 longest suits)
 2♠        Suit as good as AQxxx 8+pts
 2NT        Negative 0-7pts
 3♣        Suit as good as AQxxx 8+pts
 3♦        At least one A or good trumps
 3♥        At least one A or good trumps
 3♠        
 3NT        To Play
 4♣        At least one A or good trumps
 4♦        

2♠          8 Playing tricks meets rule of 23 (HCP + Length of 2 longest suits)
 2NT        Negative 0-7pts
 3♣        Suit as good as AQxxx 8+pts
 3♦        Suit as good as AQxxx 8+pts
 3♥        Suit as good as AQxxx 8+pts
 3♠        At least one ace or good trump support
 3NT        To Play
 4♣        
 4♦        
 4♥        
 4♠        
 4NT        Blackwood

2NT          20-22 Balanced 4432,4333,5332 ( may include 5 card major)
 3♣        Stayman
  3♦       No 4 Card Major
   3♥      Implies 4♠s
    3NT     
    4♥     
   3♠      Implies 4♥s
   3NT      Implies a 4 card major
   4♣      
   4♦      
  3♥       4+♥s
   3NT      
   4♥      
  3♠       4+♠s
   3NT      
   4♠      
 3♦        
 3♥        
 3♠        Baron 10+HCP
  3NT       Minimum opening
  4♣       Maximum hand
  4♦       Maximum hand not 4 ♣s
  4♥       Maximum hand not 4 card Minor only 4 if 4432 shape
  4♠       Maximum hand 4 if 4333 shape else 5 with no other 4 card suit
 3NT        
 4♣        
 4♦        
 4♥        
 4NT        Quantatative
 5NT        Grand Slam try

3♣          Pre-empt 6-10pts

3♦          Pre-empt 6-10pts

3♥          Pre-empt 6-10pts

3♠          Pre-empt 6-10pts

3NT          Gambling - solid Minor no o/s Aces/Kings

4♣          Pre-empt 6-10pts

4♦          Pre-empt 6-10pts

4♥          Pre-empt 6-10pts

4♠          Pre-empt 6-10pts

5♣          9+ weak to play
 5♦        9+ weak to play

5♦          9+ weak to play

5♥          9+ weak to play
Disturbed bidding
Bidding diagrams
1♣          11-19* Rule of 20 applies
 1♦        6+ HCP typically
  1♥       4+ 11*-19 pts any shape
   1♠      6+ HCP
    1NT     15-16 balanced
     2NT    
      3NT   To Play
     3NT    
     4NT    Blackwood
    2♣     5-4 or better min hand 11-14
     2♥    To play
     2♠    Fourth Suit Forcing
     2NT    
      3NT   To play
     3♥    
     3NT    
     4♥    
    2♦     Min hand 4441 shape or better
     2NT    
     3NT    
     4NT    Blackwood
    2♥     6-5 shape min hand
     2NT    
     3♥    
     3NT    
     4♥    
     4NT    Blackwood
    2♠     Min hand 4441 shape
     3♠    
     4♣    
     4♦    
     4♥    
     4♠    
     4NT    Blackwood
    2NT     17-18 balanced inv to 3NT
     3NT    
     4NT    Blackwood
    3♣     5-4-22 or better good hand
     3NT    
     4NT    Blackwood
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
     3♠    
     3NT    
     4♣    
     4♦    
     4♥    
     4NT    Blackwood
     5♣    
     5♦    
    3♥     6♣-5♥ or better shape good hand
     3♠    
     3NT    
     4♣    
     4♦    
     4♥    
     4NT    Blackwood
    3♠     4144 shape or better 15-18pts
     3NT    
     4♣    
     4♦    
     4♥    
     4♠    
     4NT    Blackwood
    3NT     19points
   1NT      6-9 HCP
    2♣     6-4 weak
     2♦    No fit
     2♥    Preference
    2♦     11-14
    2♥     6-5 weak hand
     2NT    
     3♣    Preference
     3♥    
     4♥    
    2♠     Fourth Suit forcing asking ptr to descride hand further
    2NT     17-18 bal
    3♣     6-4 or better 15+HCP
    3♦     15-17pts shortage in ♠
    3♥     6-5 15+ HCP
    3♠     Fourth Suit forcing
    3NT     19pts to play
   2♣      6-9 HCP Preference
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♦      6-9pts
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      6-9pts
    2♠     Fourth Suit forcing
    3♥     
   2♠      4TH Suit forcing -asks ptr for more information
    2NT     4th Suit stopped Min hand
    3♣     6+-4+ shape Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     6-5 shape no 4th suit stop
    3♠     Strong hand no stop in 4th suit
    3NT     15-16 4th suit stopped
    4♣     6-4 or better shape No 4th suit stop strong hand
   2NT      11-12pts balanced
   3♣      10-11pts
   3♦      No support for ptr 12+HCP
   3♥      10-12 HCP
   3♠      13+ HCP 4th Suit Forcing
   3NT      13-15 HCP
   4NT      Blackwood
  1♠       4+ 11*-19 pts any shape
   1NT      6-9 HCP
    2♣     6-4 weak
    2♦     11-14
    2♥     Fourth Suit Forcing
    2♠     6-5 Weak Hand
    2NT     17-18 bal
    3♣     6-4 or better 15+HCP
    3♦     15-17pts shortage in ♥
    3♥     Fourth Suit Forcing
    3♠     6-5 Good hand
    3NT     19pts to play
   2♣      6-9 HCP Preference
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♦      6-9pts
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      4TH Suit forcing -asks ptr for more information
    2♠     6-5 shape min hand
    2NT     4th Suit stopped Min hand
    3♣     6+-4+ shape Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     6-5 shape no 4th suit stop
    3♠     Strong hand no stop in 4th suit
    3NT     15-16 4th suit stopped
    4♣     6-4 or better shape No 4th suit stop strong hand
   2♠      6-9pts
    3♥     Long Suit game try
    3♠     17-18pts
    3NT     18-19 bal game choice
    4♣     
    4♦     
    4♥     
    4♠     
    4NT     Blackwood
   2NT      11-12pts balanced
    3NT     
    4NT     Blackwood
   3♣      10-11pts
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4♣     
    4♦     
    4♥     
    4♠     6-5 Slam Try
    4NT     Blackwood
    5♣     To Play
   3♦      No support for ptr 12+HCP
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4NT     Blackwood
   3♥      10-12 HCP
   3♠      13+ HCP 4th Suit Forcing
   3NT      13-15 HCP
   4NT      Blackwood
  1NT       15-16 balanced
   2♣      6-7pts
   2♦      6-7pts
   2♥      Strong Reverse 16+ pts
   2♠      Strong Reverse 16+ pts
   2NT      8-9pts
   3♣      10-11pts
   3♦      
    3♥     Stopper Showing - expressing doubt about ♠
    3♠     Stopper Showing - expressing doubt about ♥
    3NT     To play
   3♥      Stopper Showing - expressing doubt about ♠
   3♠      Stopper Showing - expressing doubt about ♥
   3NT      To Play
   4NT      Blackwood
  2♣       No 4 Card major weak hand 11-14
   2♦      6-9pts
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      Strong Reverse 16+ pts
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      Strong Reverse 16+ pts
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      10-11pts
   3♦      No support for ptr 12+HCP
   3♥      10-12 HCP
   3♠      13+ HCP 4th Suit Forcing
   3NT      13-15 HCP
   4NT      Blackwood
  2♦       11-14HCP unbalanced
  2♥       17+HCP strong jump shift
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP semi - forcing
  3♦       4 Card Support 16+HCP semi - forcing
   3♥      Asking for ♥ stop for 3NT
   3♠      Asking for ♠ stop for 3NT
   3NT      
  3♥       Stopper showing concern about spades
  3♠       Stopper showing concern about hearts
  3NT       19HCP Balanced
  4NT       Blackwood
 1♥        6+ HCP typically
  1♠       4+ 11*-19 pts any shape
   1NT      6-9 HCP
    2♣     6-4 weak
    2♦     4th Suit Forcing
    2♥     3 card preference weak hand 11-14
    2♠     6-5 Weak Hand
    2NT     17-18 bal
    3♣     6-4 or better 15+HCP
    3♦     Fourth Suit Forcing
    3♥     Invitational to 3NT/4♥
    3♠     6-5 Good hand
    3NT     18-19pts to play
   2♣      6-9 HCP Preference
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♦      4th Suit Forcing
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      6-9
    2♠     6-5 shape min hand
    2NT     4th Suit stopped Min hand
    3♣     6+-4+ shape Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand no stop in 4th suit
    3♠     6-5 Good hand
    3NT     15-16 4th suit stopped
    4♣     6-4 or better shape No 4th suit stop strong hand
   2♠      6-9pts
    3♥     Long Suit game try
    3♠     17-18pts
    3NT     18-19 bal game choice
    4♣     
    4♦     
    4♥     
    4♠     
    4NT     Blackwood
   2NT      11-12pts balanced
    3NT     
    4NT     Blackwood
   3♣      10-11pts
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4♣     
    4♦     
    4♥     
    4♠     6-5 Slam Try
    4NT     Blackwood
    5♣     To Play
   3♦      4th Suit Forcing
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4NT     Blackwood
   3♥      10-12 HCP
   3♠      Limit raise
   3NT      13-15 HCP
   4♣      
   4♦      
   4♥      Single suited 13-17 HCP
   4♠      12-17pts
   4NT      Blackwood
  1NT       15-16 balanced
   2♣      6-7pts
   2♦      6-7pts
   2♥      6-9
   2♠      Strong Reverse 16+ pts
   2NT      8-9pts
   3♣      10-11pts
   3♦      Strong Reverse 16+HCP
    3♥     Stopper Showing - expressing doubt about ♠
    3♠     Stopper Showing - expressing doubt about ♥
    3NT     To play
   3♥      Strong hand 6+♥
   3♠      Stopper Showing - expressing doubt about ♥
   3NT      To Play
   4NT      Blackwood
  2♣       weak hand 11-14
   2♦      6-9pts 5+♥
    2♥     5+♣-3♥ shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     11-14 pts
    3♦     5+♣ -4+♦ Inv to 3NT not likely to hold ♠ Stop
    3♥     5+♣ 3♥ 17-18pts inv to 3NT/4♥
    3♠     4th suit forcing strong hand
    3NT     19points ♠ stopped
    4NT     Blackwood
   2♥      6-9pts
    2♠     6♣ 4+♠ ♦ stop unlikely
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     6♣ 5♦ good hand no ♠ stop likely
    3♥     Inv to 3NT / 4♥
    3♠     Stopper showing asking for ♦ stop
    3NT     To Play
    4♣     6+ strong hand
   2♠      Strong Reverse 16+ pts
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     4th Suit Forcing
    3♥     3♥ min 11-14 hand
    3♠     3♠ not 3♥ ♦s likely stopped
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      10-12pts mild game try
   3♦      Strong Reverse 16+HCP 5+♥
   3♥      10-12 HCP
   3♠      Stopper showing
   3NT      13-15 HCP
   4NT      Blackwood
  2♦       17+ unbalanced
   2♥      6-9pts
   2♠      4th Suit Forcing
   2NT      6-9 Bal 4th suit Stopped
   3♣      6-7pts
   3♦      6-7pts
   3♥      10+pts
   3♠      
   3NT      To play
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  2♥       11-14
   2♠      Long Suit Game try
   2NT      Bal 11-12 inv. to 3NT/4♥
   3♣      Game try - secondary fit
   3♦      Long Suit game-try
   3♥      11-12pts typically
   3♠      
   3NT      To play
   4♣      
   4♦      
   4♥      
   4NT      Blackwood
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP
  3♦       Strong Jump Shift 17+HCP
  3♥       16-17pts 4+♣ 4+♥
  3♠       Stopper showing concern about diamonds
  3NT       19HCP Balanced
  4NT       Blackwood
 1♠        6+ HCP typically
  1NT       15-16 balanced
   2♣      6-7pts
   2♦      6-7pts
   2♥      Strong Reverse 16+ pts
   2♠      Strong Reverse 16+ pts
   2NT      8-9pts
   3♣      10-11pts
   3♦      
    3♥     Stopper Showing - expressing doubt about ♠
    3♠     Stopper Showing - expressing doubt about ♥
    3NT     To play
   3♥      Stopper Showing - expressing doubt about ♠
   3♠      Stopper Showing - expressing doubt about ♥
   3NT      To Play
   4NT      Blackwood
  2♣       No 4 Card major weak hand 11-14
   2♦      6-9pts
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      Strong Reverse 16+ pts
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      Strong Reverse 16+ pts
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      10-11pts
   3♦      No support for ptr 12+HCP
   3♥      10-12 HCP
   3♠      13+ HCP 4th Suit Forcing
   3NT      13-15 HCP
   4NT      Blackwood
  2♦       11-14HCP unbalanced
  2♥       17+HCP
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP
  3♦       4 Card Support 16+HCP
  3♥       Stopper showing concern about spades
  3♠       Stopper showing concern about hearts
  3NT       19HCP Balanced
  4NT       Blackwood
 1NT        6-9 Balanced no 4 Card Major
  2♣       No 4 Card major weak hand 11-14
  2♦       Strong Jump Shift 17+HCP
  2♥       Strong Jump Shift 17+HCP
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP
  3NT       19HCP Balanced
 2♣        6-9 Unbalanced
 2♦        Strong Jump Shift 16+HCP
 2♥        Strong Jump Shift 16+HCP
 2♠        Strong Jump Shift 16+HCP
 2NT        11-12pts balanced no 4 card major
 3♣        10-11 pts no 4 Card Major
  3♦       Asking for ♦ stop for 3NT
  3♥       Asking for ♥ stop for 3NT
  3♠       Asking for ♠ stop for 3NT
  3NT       To play 15-19 bal
 3NT        13-15pts balanced
 4NT        Blackwood

1♦          11-19* Rule of 20 applies
 1♥        6+ HCP typically
  1♠       4+ 11*-19 pts any shape
   1NT      6-9 HCP
    2♣     6-4 weak
    2♦     4th Suit Forcing
    2♥     3 card preference weak hand 11-14
    2♠     6-5 Weak Hand
    2NT     17-18 bal
    3♣     6-4 or better 15+HCP
    3♦     Fourth Suit Forcing
    3♥     Invitational to 3NT/4♥
    3♠     6-5 Good hand
    3NT     18-19pts to play
   2♣      4th Suit Forcing
    2♥     3♥ min hand
    2♠     6-5 Min Hand
    2NT     ♣ stop 11-14 pts
    3♣     Shortage in ♥s likey 4-0-5-4 shape
    3♦     6-4 or better 15+pts no ♣ stop
    3♥     3♥ good hand
    3♠     6-5 Good hand 15+HCP
    3NT     15-16 ♣ stop
   2♦      6-9pts Preference
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      6-9 pts
    2♠     6-5 shape min hand
    2NT     4th Suit stopped Min hand
    3♣     6+-4+ shape Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand no stop in 4th suit
    3♠     6-5 Good hand
    3NT     15-16 4th suit stopped
    4♣     6-4 or better shape No 4th suit stop strong hand
   2♠      6-9pts
    3♥     Long Suit game try
    3♠     17-18pts
    3NT     18-19 bal game choice
    4♣     
    4♦     
    4♥     
    4♠     
    4NT     Blackwood
   2NT      11-12pts balanced
    3NT     
    4NT     Blackwood
   3♣      Fourth Suit Forcing
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4♣     
    4♦     
    4♥     
    4♠     6-5 Slam Try
    4NT     Blackwood
    5♣     To Play
   3♦      10-11pts
    3♥     Fourth Suit Forcing
    3♠     6-5
    3NT     To play
    4NT     Blackwood
   3♥      10+ HCP
   3♠      Limit raise
   3NT      To Play
   4♣      
   4♦      
   4♥      Single suited 13-17 HCP
   4♠      12-17pts No slam Interest
   4NT      Blackwood
  1NT       15-16 balanced
   2♣      5+♥ 4+♣ no ♦ fit unbalanced 6-8pts
   2♦      4+♥ 4+♦ weak hand likely unbalanced
   2♥      6-7pts weak normally 6+ may be 5
   2♠      Strong Reverse 16+ pts
   2NT      8-9pts
   3♣      Strong Reverse 16+HCPs
   3♦      Limit Raise 10-11pts
    3♥     Stopper Showing - expressing doubt about ♠
    3♠     Stopper Showing - expressing doubt about ♥
    3NT     To play
   3♥      Strong hand 6+♥
   3♠      Stopper Showing - expressing doubt about ♣
   3NT      To Play
   4NT      Blackwood
  2♣       weak hand 11-14 5+♦
   2♦      6-9pts 5+♥
    2♥     5+♣-3♥ shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     11-14 pts
    3♦     5+♣ -4+♦ Inv to 3NT not likely to hold ♠ Stop
    3♥     5+♣ 3♥ 17-18pts inv to 3NT/4♥
    3♠     4th suit forcing strong hand
    3NT     19points ♠ stopped
    4NT     Blackwood
   2♥      6-9pts
    2♠     6♣ 4+♠ ♦ stop unlikely
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     6♣ 5♦ good hand no ♠ stop likely
    3♥     Inv to 3NT / 4♥
    3♠     Stopper showing asking for ♦ stop
    3NT     To Play
    4♣     6+ strong hand
   2♠      4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     5+-5 shape hand no ♠ stop
    3♦     6-4+ shape no Spade stop no 3 card support for ♥
    3♥     3♥ min 11-14 hand
    3♠     3♠ not 3♥ ♦s likely stopped
    3NT     15+HCP 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      10-12pts mild game try
   3♦      Game Try showing doubt about ♠ stop
   3♥      12+ HCP Game try
   3♠      Stopper showing
   3NT      13-15 HCP
   4NT      Blackwood
  2♦       12-14 Unbalanced no 4 card major
   2♥      6-9pts
   2♠      Strong Reverse 16+HCP
    3♣     Fourth Suit Forcing
   2NT      6-9 Bal 4th suit Stopped
   3♣      Strong Reverse 16+HCP
   3♦      12+HCP unlikely to have ♣ stop
   3♥      Strong hand 6+♥
   3♠      ♠ Stop asking about ♣ stop for NT
   3NT      To play
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  2♥       11-14
   2♠      Long Suit Game try
   2NT      Bal 11-12 inv. to 3NT/4♥
   3♣      Long Suit game try
   3♦      Long Suit game-try
   3♥      11-12pts typically
   3♠      
   3NT      To play
   4♣      
   4♦      
   4♥      
   4NT      Blackwood
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP
  3♦       16+HCP No 4 card major
  3♥       16-17pts 4+♦ 4+♥
  3♠       Stopper showing concern about ♣
  3NT       19HCP Balanced
  4NT       Blackwood
 1♠        6+ HCP typically
  1NT       15-16 balanced
   2♣      6-7pts
   2♦      6-7pts
   2♥      Strong Reverse 16+ pts
   2♠      Strong Reverse 16+ pts
   2NT      8-9pts
   3♣      10-11pts
   3♦      
    3♥     Stopper Showing - expressing doubt about ♠
    3♠     Stopper Showing - expressing doubt about ♥
    3NT     To play
   3♥      Stopper Showing - expressing doubt about ♠
   3♠      Stopper Showing - expressing doubt about ♥
   3NT      To Play
   4NT      Blackwood
  2♣       No 4 Card major weak hand 11-14
   2♦      6-9pts
    2♥     6-5 shape min hand
    2♠     4th suit forcing asking for spade stop
    2NT     17-18 balanced inv to 3NT
    3♣     Invitational to 5♣
    3♦     Showsd 4441 invitational to 3NT/5♣/5♦
    3♥     6♣-5♥ or better shape good hand
    3♠     4th suit forcing
    3NT     19points ♠ stopped
   2♥      Strong Reverse 16+ pts
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      Strong Reverse 16+ pts
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      10-11pts
   3♦      No support for ptr 12+HCP
   3♥      10-12 HCP
   3♠      13+ HCP 4th Suit Forcing
   3NT      13-15 HCP
   4NT      Blackwood
  2♦       11-14HCP unbalanced
  2♥       17+HCP
  2♠       Min hand
  2NT       17-18pts balanced no 4 card major
  3♣       Reverse 5+♦ 16+ HCP
  3♦       16+HCP
  3♥       Stopper showing concern about ♣s
  3♠       15-16pts
  3NT       19HCP Balanced
  4NT       Blackwood
 1NT        6-9 Balanced no 4 Card Major
  2♣       No 4 Card major weak hand 5+♦ 11-14
  2♦       11-14 pts
  2♥       Strong Jump Shift 17+HCP
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced no 4 card major
  3♣       Strong suit 16+ HCP
  3♦       Invitational to 3NT shows 16+HCP long ♦ suit
  3NT       19HCP Balanced
 2♣        9+ HCP
 2♦        6-9pts no 4 card major
  2NT       
 2♥        Strong Jump Shift 16+HCP
 2♠        Strong Jump Shift 16+HCP
 2NT        11-12pts balanced no 4 card major
 3♣        Strong Jump Shift 16+HCP
 3♦        10-11pts No 4 card major
  3♥       Asking for ♥ stop for 3NT
  3♠       Asking for ♠ stop for 3NT
  3NT       To play 15-19 bal
 3NT        13-15pts balanced
 4NT        Blackwood

1♥          11-19* Rule of 20 applies
 1♠        6+ HCP typically
  1NT       15-16 balanced
   2♣      6-7pts
    2♠     
    2NT     
   2♦      6-7pts
    2♠     
   2♥      Weak raise 6-9pts unbalanced
    2♠     
   2♠      5+♠ likely 6 weak hand
   2NT      8-9pts
    3♠     
    3NT     
   3♣      13+HCP likely 5+♠/4+♣
    3♠     
    3NT     
    4♦     
    4♠     
   3♦      13+HCP likely 5+♠/4+♦
    3♠     
    3NT     To play
   3♥      3+♥ forcing to 3NT/4♥
   3♠      Long Spade suit 12+HCPs
   3NT      To Play
   4♣      
   4♦      
   4♥      
   4♠      One suited hand to play
   4NT      Blackwood
  2♣       5+♥ 4+♣ weak hand 11/12-14
   2♦      Fourth Suit Forcing
    2♥     6-5 shape min hand
    2♠     Min hand
    2NT     ♦ stopped min hand 11-14 pts
    3♣     No ♦ stop 5-5 shape or better
    3♦     5422 hand no ♦ stop no 3♠s
    3♥     6♣-5♥ or better shape good hand
    3♠     3♠ max hand 14/15 pts
    3NT     14pts ♦s stopped
   2♥      Preference
    2♠     
    3♣     14HCPs 6-5 Shape inv to 4♥ forcing to 3♥
    3♥     Inv to 4♥ extra shape
    3♠     Inv to 4♥/4♠ likely ♦ singleton/void
    4♣     6+ strong hand
   2♠      No tolerance for ♣/♥
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand 5-5 or better
    3♥     6-4 shape or better
    3♠     
    3NT     
   2NT      11-12pts balanced
    3♣     5-5 no ♠ tolerance and ♦ shortage
    3♥     
    3♠     
    3NT     To Play
   3♣      Looking for 3NT if max and with ♦ stop
    3♦     FSF max hand but no ♦ stop
    3♥     6-5hand looking for ♥ or ♣ game
    3♠     Max hand 3♠ no ♦ stop
    3NT     Max hand ♦s stopped
   3♥      10-12 HCP
   3♠      
   3NT      13-15 HCP
   4♥      1♠ was delayed Game Raise 13+HCP
   4NT      Blackwood
  2♦       5+♥ 4+♦ 11-14HCP unbalanced
   2♥      Preference
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      No tolerance for ♦/♥
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      Fourth Suit forcing
    3♦     FSF max hand but no ♦ stop
    3♥     6-5hand looking for ♥ or ♣ game
    3♠     Max hand 3♠ no ♦ stop
    3NT     Max hand ♦s stopped
   3♦      Looking for 3NT or 5D if max denies ♣ stop
   3♥      10-12 HCP
   3♠      
   3NT      13-15 HCP
   4♥      To Play 13+HCP 1♠ was delayed game raise
   4♠      
   4NT      Blackwood
  2♥       Weak hand no 4 card minor
   2♠      0 or 1 ♥ weak hand
   2NT      Inv to 3NT
   3♣      5+♠ 4+♣ 13+HCP
   3♦      5+♠ 4+♦ 13+HCP
   3♥      
   3♠      Semi Forcing 12-13pt hand no ♥ support
   3NT      TO PLAY
  2♠       5+♥ 4+♠ weak hand
  2NT       17-18pts balanced
   3♥      
   3♠      
   3NT      
   4NT      Blackwood
  3♣       Strong suit 16+ HCP
   3♦      fourth suit forcing
   3♥      
   3♠      
   3NT      
   4♣      
   4♥      
  3♦       16+HCP semi-forcing
   3♥      
   3♠      
   3NT      
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3♥       16+HCP semi-forcing
  3♠       5+♥ 4+♠ Inv to 4♥/4♠
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3NT       19HCP Balanced to play
  4♣       
  4♦       
  4♥       Strong one-suited hand 18-19pts
  4♠       5+♥ 4+♠ 18-19pts
  4NT       Blackwood
 1NT        6-9 Balanced no 4 Card Major
  2♣       weak hand 11-14
  2♦       weak hand 11-14
  2♥       weak hand 11-14
  2♠       Strong Jump Shift 17+HCP
  2NT       17-18pts balanced
  3♣       Strong suit 16+ HCP
  3♦       Strong suit 16+ HCP
  3♥       
  3NT       19HCP Balanced
 2♣        9+ Unbalanced
  2♦       5+♥ 4+♦ 11-14HCP unbalanced
   2♥      Preference
    2♠     4th Suit Forcing
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Strong hand inviting slam try
    3♠     Strong hand no stop in 4th suit
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2♠      No tolerance for ♦/♥
    2NT     4th Suit stopped Min hand
    3♣     Min HCP hand
    3♦     No 4th Suit stop for NT 3+ support openers suit Min hand
    3♥     Fourth Suit Forcing
    3♠     Strong hand inviting Slam try
    3NT     11-14 4th suit stopped
    4♣     6+ strong hand
   2NT      11-12pts balanced
    3♣     11-14
    3NT     To Play
   3♣      Fourth Suit forcing
    3♦     FSF max hand but no ♦ stop
    3♥     6-5hand looking for ♥ or ♣ game
    3♠     Max hand 3♠ no ♦ stop
    3NT     Max hand ♦s stopped
   3♦      Looking for 3NT or 5D if max denies ♣ stop
   3♥      10-12 HCP
   3♠      
   3NT      13-15 HCP
   4♥      To Play 13+HCP 1♠ was delayed game raise
   4♠      
   4NT      Blackwood
  2♥       Weak hand no 4 card minor
   2♠      0 or 1 ♥ weak hand
   2NT      Inv to 3NT
   3♣      5+♠ 4+♣ 13+HCP
   3♦      5+♠ 4+♦ 13+HCP
   3♥      
   3♠      Semi Forcing 12-13pt hand no ♥ support
   3NT      TO PLAY
  2♠       Strong Reverse 16+ 5+♥s
  2NT       17-18pts balanced
   3♥      
   3♠      
   3NT      
   4NT      Blackwood
  3♣       Invitational looking for ♥/♣ or 3NT 5+♥s
   3♦      fourth suit forcing
   3♥      
   3♠      
   3NT      
   4♣      
   4♥      
  3♦       16+HCP
   3♥      
   3♠      
   3NT      
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3♥       16+HCP semi-forcing
  3NT       19HCP Balanced to play
  4♣       
  4♦       
  4♥       Strong one-suited hand 18-19pts
  4♠       5+♥ 4+♠ 18-19pts
  4NT       Blackwood
 2♦        9+HCP
  2♥       Weak hand no 4 card minor
   2♠      0 or 1 ♥ weak hand
   2NT      Inv to 3NT
   3♣      5+♠ 4+♣ 13+HCP
   3♦      5+♠ 4+♦ 13+HCP
   3♥      
   3♠      Semi Forcing 12-13pt hand no ♥ support
   3NT      TO PLAY
  2♠       Strong Reverse 16+
  2NT       17-18pts balanced
   3♥      
   3♠      
   3NT      
   4NT      Blackwood
  3♣       Strong Reverse 16+HCP
   3♦      fourth suit forcing
   3♥      
   3♠      
   3NT      
   4♣      
   4♥      
  3♦       Invitational looking for ♥/♦ or 3NT
   3♥      
   3♠      
   3NT      
   4♣      
   4♦      
   4♥      
   4♠      
   4NT      Blackwood
  3♥       16+HCP
  3NT       19HCP Balanced to play
  4♣       
  4♦       
  4♥       Strong one-suited hand 18-19pts
  4♠       5+♥ 4+♠ 18-19pts
  4NT       Blackwood
 2♥        6-9pts
  2♠       Long Suit game-try
  2NT       17-18 4333 shape
  3♣       Long Suit game-try
  3♦       Long Suit game-try
  3♥       
  4♥