∑OTZ (Precision style)

Default principles
Offensive bidding
Bidding diagrams
Opening bids:
1 17+HCP bal or 15+HCP unbal
1 Nebulous 1, 11-15 HCP, (Often 11-13 bal)
1 5+, 9-15
1 5+, 9-15
1NT 14-16 HCP (5-crd major poss)
2 6+, 9-15
2 Multi (Weak-Two in a major)
2 Good preempt in
2 Good preempt in
2NT Preempt in
3 Preemt in
3 Preempt in
3 Preempt in
3 Any solid 7+crd suit
3NT Preempt in & MA (6+/5+)
4 Preempt in & MA (6+/5+)
4 Preempt in & (6+/5+)
4 Preempt in & (6+/5+)
4 Preempt with both mi (6+/5+)
4NT Preempt w/ both minors
5 Preempt
5 Preempt

  D            (If 2 is "strong") suit

  2            5-5 in Both majors. Non vul against vul 5-4 is acceptable.

  2            5+ & 5+

  2            5+ & 5+


After bidding 1
  1            0-8(9) HCP
  1          1) 15-18 w/5+ 2) Many unknown 19+hands
   1         Relay - asking
    1NT        19-20, bal
    2        Any 22+unbal or any 23+bal
     2       Denying a 5+crd suit
      2      1) or 2) 25+ bal
       2     Relay - asking
        2NT    25+hcp
        3    5+ & 4+
        3    5+ & 4+
        3    6 (One suiter)
        3    5+ & 4+
         4   Slam try w/ support
         4   Slam try w/ support
        3NT    25-26NT (very often no MA)
      2      4+ (longer mi poss)
      2NT      23-24
      3      5+crd (Denying 4-crd )
      3      5+crd (Denying 4-crd )
      3      
      3      
      3NT      
     2       6-8, 4+ (longer mi poss)
     2       6-8, 4+ (longer mi poss)
     2NT       (Don't excist)
     3       6-8, 5+crd (no 4-crd major)
     3       6-8, 5+crd (no 4-crd major)
    2        15-18, 5+ & 4+
    2        1) 6+, 15-18 or 2) 5+ & 4+, 15-18
    2        (18)19-21, 3-suiter w/4-5 (denying 4)
     2NT       Relay - asking
      3      Unknown 3-suiter w/4-crd -suit
       3     Asking
        3    3451
        3    3415
        3NT    1444 or 0XXX
      3      1453 or 1435
       3     Asking
        3    1453
        3NT    1435
      3      3541
      3      3514
      3NT      1534 or 1543
     3       p/c
     3       p/c
     3       To-play
     3       Unknown singleton w/4+
     3NT       Void in , 4+
     4       Void, 4+
     4       Void, 4+
     4       To-play
    2NT        21-22, bal
    3        5+ & 5+, 17-18
    3        5+ & 5+, 17-18
    3        Strong -suit, 17-18
   1NT         5+, 0-5
   2         5+, 0-5
   2         5+, 0-5
   2         5+, 0-5
   2         5+ & 5+in-a-minor, 5-8
   2NT         5+ & 5+in-a-minor, 5-8
   3         5+ & 5+, 5-8
   3         5+ & 5+, 5-8
  1          15-22, 4+
   1NT         (3)4-5
    2        5/4 either way, 15-19
    2        5/4 either way, 15-19
    2        5/4 either way, 15-19
    2        15-19, 6+
    2NT        20-22, often bal
     3       Stayman-ish
     3       Transfer, 5
     3       "Transfer", 3 (not 4 or 5 )
    3        20-22, 5+
    3        20-22, 5+
    3        20-22, 5+
    3        6+
   2         6-8, 0-2 (denies 5)
    2        Weak relay (often 15-17)
     2       4
     2       2 (not 4)
     2NT       Not 4 and not 2 (often 1-3-X-X)
     3       6-crd
     3       6-crd
    2        5+
    2        6+
    2NT        Strong relay (18+), often bal
    3        5+, 18+hcp
    3        5+, 18+hcp
    3        5+, 18+hcp
    3        6+, 18+hcp
   2         6-8, exactly 3
   2         6-8, 5 (denies 3)
   2         3-5, 4+
   2NT         5/5, 6-8hcp (0-2)
   3         HHxxxx
   3         HHxxxx
   3         6-8, 6 & 3
   3         6-8, 4+ (no singleton)
   3NT         Unknown singleton w/4+
   4         Void, 4+
   4         Void, 4+
   4         Void, 4+
   4         Many trumps (No singleton or void)
  1NT          17-18
   2         Stayman
   2         
   2         
   2         Weak with either minor
   2NT         
   3         
   3         
  2          15-18, 5+, unbal (denying 4)
   2         
    2        
    2        Singleton
    2NT        
    3        
    3        Singleton
   2         
   2         
   2NT         
   3         
   3         Singleton w/good supp.
   3         Singleton w/ good supp.
   3         Singleton w/ good supp.
  2          15-18, 5+, unbal (denying 4)
   2         
    2        4
    2NT        
    3        4+
    3        
   2         
   2NT         
   3         
   3         
   3         Splinter
   3         Splinter
   4         Splinter
  2          (18)19-21, 5+, unbal (denying 4)
  2          (18)19-21, 6+in-a-unknown-mi (denying 4crd MA)
  2NT          (18)19-21, at least 5-4 in mi
   3         
   3         
   3         
   3         
  3          (18)19-21, (5)6+ & 4
   3         Relay
    3        
    3        
    3NT        
   3         
   3         
   3NT         
  3          (18)19-21, (5)6+ & 4
  3          Solid or semi-solid suit (18-20)
  3          Solid or semi-solid suit (18-20)
  3NT          Often solid minor with side stoppers

  1            1) 5+ OR 2) bal-hand
  1          Relay - asking
   2         Bal
    2        Stayman-ish
     2       4-5, Bal
     2       4 (denying 4)
     2NT       Any 4-4-4-1 hand w/ singleton A or K
      3      Relay
     3       x-x-4-4
     3       5332 type
     3       5332 type
     3       3-3-3-4 or 3-3-4-3, 9-12
     3NT       3-3-3-4 or 3-3-4-3, 13-14
     4       3-3-3-4, 15+
     4       3-3-4-3, 15+
   2         5 & 4
   2         5 & 4
   2         5 & 4
   3         5 & 5
   3         5 & 5
   3         6 (one suiter)
   3         6 & 5
  1NT          Often 17-18 bal
  2          6
  2          6
  2          6
  2          6
  3          Strong 7-crd suit (one suiter)
  3          Strong 7-crd suit (one suiter)
  3          Strong 7-crd suit (one suiter)
  3          Strong 7-crd suit (one suiter)

  1            5+
  1NT          Not necessarily bal.....but probably no 6-crd suit ;-)
  2          
  2          
  2          
  2          
  2NT          4+crd support (Bekkasin)
  3          Mini-Splinter
  3          Mini-Splinter
  3          Mini-Splinter
  4          Voidwood
  4          Voidwood
  4          Voidwood

  1NT            5+
  2          Waiting
   2         
   2         
   2         
   3         
   3         Mini-Splinter
   3         Mini-Splinter
   3         Mini-Splinter
  2          
  2          
  2          
  3          

  2            5+
  2          Waiting
   2         
   2         
   3         
   3         
  2          
  2          
  3          
  3          

  2            Multi (Weak-Two in a major) 6-8hcp

  2            Any 4-4-4-1 hand (unknown singleton)
  2          
   2NT         Single
    3        Control ask w/ support
     3       0-2 controls
     3       2 controls (2 kings)
     3       3 controls
     3NT       4 controls
     4       5 controls
     4       6 controls
    3        Control ask w/ support
     3       0-2 controls
     3       2 controls (2 kings)
     3NT       3 controls
     4       4 controls
     4       5 controls
    3        Control ask w/ support
     3       0-2 controls
     3NT       2 controls (2 Kings)
     4       3 controls
     4       4 controls
     4       5 controls
     4       6 controls
   3         Single
    3        Control ask w/ support
    3        Control ask w/ support
    3        Control ask w/ support
   3         Single
    3        Control ask w/ support
    3        Control ask w/ support
    4        Control ask w/ support
   3         Single
    3        Control ask w/ support
    4        Control ask w/ support
    4        Control ask w/ support

  2            Any 5-4-4-0 hand (unknown void)
  2NT          Relay - asking
   3         X-X-X-0 type
   3         X-X-0-X type
   3         X-0-X-X type
   3         0-X-X-X type

  2NT            Preempt in
  3          
   3         
    3        Control ask w/ support
    3        Control ask w/ support
    4        Control ask w/ support
   3         
    3        Control ask w/ support
    4        Control ask w/ support
    4        Control ask w/ support
   3         
    3NT        Nat.
    4        Control ask w/ support
    4        Control ask w/ support
    4        Nat. (not forcing)
    4        Control ask w/ support
   3NT          void (9-12)
    4        Puppet to 4
     4       Forced!
      4      Nat. (not forcing)
      4      Nat. (not forcing)
    4        Control ask w/ support
    4        Control ask w/ support
    4        Control ask w/ support
   4         13+
    4        Control ask w/ support
    4        Control ask w/ support
    4        Control ask w/ support
    4NT        Nat.

  3            Preempt in

  3            Preempt in

  3            Preempt in

  3            Any solid 7+crd suit


After bidding 1
  1            
  1          
   1NT         
   2         4th suit
   2         
   2         
   2         Usually 4 spades
   2NT         
   3         5 & 5
   3         
   3         
   3         
  1NT          11-13 bal
  2          5-4 either way in minors (or 5-5)
   2         
   2         
   2         4th suit
   2NT         
   3         
   3         Usually four diamonds
   3         
  2          
   2         
   2         Ostensibly natural, maybe NT probe, adv cue for or waiting
   2NT         
   3         Onstensibly natural, maybe NT probe or adv cue for
   3         
   3         
   4         
  2          
  2          Splinter bid
  2NT          6-7, max
  3          Splinter bid
  3          Splinter bid
   3         
   3         Notrump probe or advanced cue
  3          
  3          
  4          
  4          

  1            
  1NT          11-13 bal, singleton is possible
  2          5-4 either way in minors (or 5-5)
  2          
   2         
   2         
   2NT         
   3         Can be a notrump probe or adv cue for
   3         
   3         
   3         
  2          5-6 & 4, max
  2          
  2NT          6, max
  3          Splinter bid
  3          Splinter bid
  3          Splinter bid

  1NT            7-10

  2            GF, except if rebid 3
  2          Extra length and/or minimum hand
  2          
  2          
  2NT          
  3          
  3          

  2            GF, except if rebid 3

  2            Weak-two

  2            Weak-two

  2NT            11-12, no 4-crd major

  3            5+ & 5+, 9-11

  3            5+ & 5+,

  3            Typical 3-1 in majors and (54) in minors

  3            Typical 1-3 in majors and (54) in minors

  3NT            13-15(16), nat.


After bidding 1
  1            
  1NT          
   2         
   2         Usually six spades
   2NT         
   3         
   3         Usually four diamonds
   3         
   3         
  2          
   2         4th suit
   2         Possibly false preference
   2         
   2NT         
   3         
   3         
   3         
   3         
   4         
  2          
   2         Possibly false preference
   2         
   2NT         
   3         4th suit
   3         
   3         
   3         
   4         
  2          
   2         
   2NT         
   3         
   3         Usually four diamonds
   3         
   3         
  2          
  3          
   3         4th suit
  3          
  3          
  3          

  1NT            8-13
  2          
   2         5+
   2         
   2         5+, max
   2NT         11-13
   3         5+, min
  2          
   2         
   2         5+, max
   2NT         11-13
   3         
   3         5+, min
  2          
  2          
  3          

  2            GF, except if rebid 3
  2          
  2          Minimum and/or extra length
  2          
  2NT          
  3          
  3          
  3          

  2            GF, except if rebid 3
  2          
  2          
  2NT          
  3          
  3          
  3          

  2            
  2          Opener must bid 2N
   2NT         Forced
    3        Trial-bid in
    3        Trial-bid in
    3        Trial-bid in
  2NT          Short suit trial-bid in
  3          Short suit trial-bid in
  3          Short suit trial-bid in

  2            Limit raise in

  2NT            GF w/support

  3            10-12 w/support

  3            6-9 w/support

  3            

  3            Unknown singleton w/support

  3NT            Support w/void in

  4            Support w/void in

  4            Support w/void in

  4            In principle preemptive but can be quite strong


After bidding 1
  1NT            8-13

  2            GF, except if rebid 3
  2          
   2         4th suit
  2          
  2          Extra length and/or minimum
  2NT          
  3          
  3          
  3          

  2            GF, except if rebid 3
  2          
  2          Minimum and/or extra length

  2            GF, except if rebid 3
  2          Minimum and/or extra length
  2NT          
  3          
  3          
  3          

  2            
  2NT          Opener must bid 3
   3         Forced
    3        Trial-bid in
    3        Trial-bid in
    3        Trial-bid in

  2NT            GF w/support

  3            10-12 w/support

  3            6-9 w/support

  3            10-12 w/support

  3            

  3NT            GF w/support, unknown singleton

  4            Void

  4            Void

  4            Void

  4            Preemive in nature but can be quite strong


After bidding 1NT
  2            Puppet Stayman
  2          No 5-crd major
   2         4
   2         4
   2NT         Denying 4-crd majors
   3         
   3         
  2          
  2          
  2NT          No majors, min
  3          Max
  3          Max
  3NT          No majors, max

  2            

  2            

  2            Minor Stayman
  2NT          No minor w/ Hxxx or better
   3         Both minors (5-5), sign-off
   3         
   3         Shortness
   3         Shortness
  3          Hxxx or better in
   3         
   3         Shortness
   3         Shortness
  3          Hxxx or better in
   3         Shortness
   3         Shortness

  2NT            Transfer to 3 (Very often sign-off in but could be a GF with a Marmic hand)
  3          Forced ;-)
   3         4-4-1-4 (singleton )
   3         4-1-4-4 (singleton )
   3         1-4-4-4 (singleton )
   3NT         4-4-4-1 (singleton , 10-12)
   4         4-4-4-1 (singleton , 13+)

  3            

  3            

  3            3-1 in majors (54 in minors)

  3            1-3 in majors (54 in minors)

  3NT            

  4            1430

  4            

  4            

  4            6-5 in minors


After bidding 2
  2            Ask for major
  2          
   2         Can be nat. or can be a stopper
   2NT         
   3         
   3         Can be nat. or can be a stopper.
   3         
   3         Splinter
   4         
   4         Splinter
   4         
   4         Voidwood
   4NT         1430
   5         Voidwood
  2          
   2NT         
   3         
   3         Can be nat. or can be a stopper
   3         Can be nat. or can be a stopper
   3         
   4         
   4         Splinter
   4         Splinter
   4NT         1430
   5         Voidwood
   5         Voidwood
  2NT          
   3         
   3         Maybe nat. or maybe a stopper
   3         Maybe nat. or maybe a stopper
   3         Maybe nat. or maybe a stopper
  3          
   3         Ostensibly natural but can be a notrump probe
   3         Nat. or stopper
   3         Nat. or stopper
  3          
  3          
  3          

  2            
  2          0-2
   2NT         Nat. not forcing
   3         Nat. not forcing
   3         GF
   3         
  2NT          1-2, min.
  3          0-2, min
  3          max.
  3          
  3          Splinter
  3NT          1-2, Nat., max
  4          Splinter
  4          Nat.

  2            
  2NT          1-2, min.
   3         Not forcing
   3         GF
   3         
   3         
  3          0-2, min.
   3         GF
   3         
   3         
  3          0-2, max.
  3          0-2, max.
  3          Nat.
  3NT          Nat. max.
  4          Splinter
  4          Splinter
  4          Nat.

  2NT            Puppet to 3 1) Preempt in or 2) 5-5 hand, GF

  3            Puppet to 3 1) Weak hand w/long or 2) Slam try w/ a 6-crd suit.

  3            Short

  3            Short

  3            Short

  3NT            Nat.

  4            

  4            1430

  4            To-play

  4            To-play


After bidding 2
  2            p/c

  2            p/c

  2NT            Relay ask
  3          Any max. (Unknown suit)
  3           suit, min.
   3         
   3         
   4         
  3           suit, min.
  3          AKQxxx in
  3NT          AKQxxx in

  3            

  3            

  3            p/c

  3            p/c

  3NT            

  4            Opener bids the suit under his major

  4            To-play

  4            To-play


After bidding 2
  2            

  2NT            Ask for quality
  3          1 top honnor in
  3          2 top honnors in and feature
  3          2 top honnors in and feature
  3          2 top honnors in and feature
  3NT          AKQxxx

  3            

  3            Ask for 3-crd MA
  3          
  3          
  3NT          No 3-crd MA

  3            


After bidding 2
  2NT            Ask for quality
  3          2 top honnors in and feature
  3          1 top honnor in
  3          2 top honnors in and feature
  3          2 top honnors in and feature
  3NT          AKQxxx

  3            Ask for 3-crd MA
  3          No 3-crd MA
  3          
  3          
  3NT          No 3-crd MA (AKQxxx)

  3            

  3            

  3            


After bidding 2NT
  3            

  3            

  3            

  3            

  4            


After bidding (1)
  1            1) 10-14, 0+, often 11-13 bal 2) If a passed hand: 8-11 w/5+

  1            1) 9-14 2) If a passed hand: 7-10

  1            1) 9-14 2) If a passed hand: 7-10

  1NT            1) 14-16 2) If a passed hand: 7-10 w/5-5 in minors

  2            1) 10-14 2) If a passed hand: 7-10 w/both majors (5-4 or better)

  2            1) Multi (Weak-Two in-a-major) 2) If a passed hand: Preempt w/6+

  2            1) Bad preempt in 2) If a passed hand: Preempt in

  2            1) Bad preempt in 2) If a passed hand: Preempt in

  2NT            1) Good preempt in 2) If a passed hand: Preemt in minors (6-5)

  3            1) God preempt in 2) If a passed hand: Preempt in

  3            1) suit 2) If a passed hand: Preempt in

  3            1) suit 2) If a passed hand: Preemt in

  3            1) Any solid minor 2)If a passed hand: Preemt in

  4            

  4            


After bidding (1NT)
  2            Both majors - at least 5-4

  2            6crd in unknown major

  2            5+ & 4+ in unknown minor

  2            5+ & 4+ in unknown minor

  2NT            5+ & 5+ or any strong 2-suiter


After bidding (1)
  2NT            5+ & 5+

  3            5+ & 5+


After bidding (1)
  2NT            5+ & 5+

  3            5+ & 5+


After bidding (1)
  2NT            5+ & 5+

  3            5+ & 5+


After bidding (2)
  2            (if 2 is "strong") Multi

  2            (If 2 is "strong") 5-5 in / OR /

  2            (If 2 is "strong") 5-5 in / (reds) OR 5-5 in / (blacks)

  2NT            (If 2 is "strong") 5-5 in minors OR 5-5 in majors

Disturbed bidding
Bidding diagrams
1 17+HCP bal or 15+HCP unbal
1 Nebulous 1, 11-15 HCP, (Often 11-13 bal)
1 5+, 9-15
1 5+, 9-15
1NT 14-16 HCP (5-crd major poss)
2 6+, 9-15
2 Multi (Weak-Two in a major)
2 Good preempt in
2 Good preempt in
2NT Preempt in
3 Preemt in
3 Preempt in
3 Preempt in
3 Any solid 7+crd suit
3NT Preempt in & MA (6+/5+)
4 Preempt in & MA (6+/5+)
4 Preempt in & (6+/5+)
4 Preempt in & (6+/5+)
4 Preempt with both mi (6+/5+)
4NT Preempt w/ both minors
5 Preempt
5 Preempt

  D            (If 2 is "strong") suit

  2            5-5 in Both majors. Non vul against vul 5-4 is acceptable.

  2            5+ & 5+

  2            5+ & 5+


After bidding 1
  D            Opps Bid
  RD          3-5
  1          6-8
   1         16-21 Usually 5+ s
    1        
    1NT        
    2        
    2        
    2        
    2        Three-suited
    2NT        3-suited short in hearts
    3        Three-suited
    3        3-suited
   1         16-21 HCP. Usually 5+ s
    1NT        
    2        
    2        
    2        
    2        
    2NT        3-suited short in hearts
    3        Three-suited
    3        3-suited
    3        Three-suited
   1NT         16-18
    2        Stayman
    2        
    2        
    2        Weak with either minor
    2NT        
    3        
    3        
   2         16-21
    2        
    2        
    2        
    2NT        
    3        
    3        Three-suited
    3        Thre-suited
    3        Three-suited
   2         16-21 HCP
   2         
   2         
   2NT         19-21
    3        Stayman
    3        
    3        
   3         
   3         
   3NT         24-27
  1          Bal or 5+
  1          
  1NT          5+
   2         Stayman
   2         
   2         
   2         
  2          5+
   2         
  2          Weak-Two in a major
  2          Any 4-4-4-1 hand
  2          Any 5-4-4-0 hand
  2NT          "Preempt" w/7-crd
  3          "Preempt" w/ 7-crd
  3          "Preempt" w/ 7-crd
  3          "Preempt" w/ 7-crd
  3          Any solid 7-crd suit

  1            0-8(9) HCP
  1          1) 15-18 w/5+ 2) Many unknown 19+hands
   1         Relay - asking
    1NT        19-20, bal
    2        Any 22+unbal or any 23+bal
     2       Denying a 5+crd suit
      2      1) or 2) 25+ bal
       2     Relay - asking
        2NT    25+hcp
        3    5+ & 4+
        3    5+ & 4+
        3    6 (One suiter)
        3    5+ & 4+
         4   Slam try w/ support
         4   Slam try w/ support
        3NT    25-26NT (very often no MA)
      2      4+ (longer mi poss)
      2NT      23-24
      3      5+crd (Denying 4-crd )
      3      5+crd (Denying 4-crd )
      3      
      3      
      3NT      
     2       6-8, 4+ (longer mi poss)
     2       6-8, 4+ (longer mi poss)
     2NT       (Don't excist)
     3       6-8, 5+crd (no 4-crd major)
     3       6-8, 5+crd (no 4-crd major)
    2        15-18, 5+ & 4+
    2        1) 6+, 15-18 or 2) 5+ & 4+, 15-18
    2        (18)19-21, 3-suiter w/4-5 (denying 4)
     2NT       Relay - asking
      3      Unknown 3-suiter w/4-crd -suit
       3     Asking
        3    3451
        3    3415
        3NT    1444 or 0XXX
      3      1453 or 1435
       3     Asking
        3    1453
        3NT    1435
      3      3541
      3      3514
      3NT      1534 or 1543
     3       p/c
     3       p/c
     3       To-play
     3       Unknown singleton w/4+
     3NT       Void in , 4+
     4       Void, 4+
     4       Void, 4+
     4       To-play
    2NT        21-22, bal
    3        5+ & 5+, 17-18
    3        5+ & 5+, 17-18
    3        Strong -suit, 17-18
   1NT         5+, 0-5
   2         5+, 0-5
   2         5+, 0-5
   2         5+, 0-5
   2         5+ & 5+in-a-minor, 5-8
   2NT         5+ & 5+in-a-minor, 5-8
   3         5+ & 5+, 5-8
   3         5+ & 5+, 5-8
  1          15-22, 4+
   1NT         (3)4-5
    2        5/4 either way, 15-19
    2        5/4 either way, 15-19
    2        5/4 either way, 15-19
    2        15-19, 6+
    2NT        20-22, often bal
     3       Stayman-ish
     3       Transfer, 5
     3       "Transfer", 3 (not 4 or 5 )
    3        20-22, 5+
    3        20-22, 5+
    3        20-22, 5+
    3        6+
   2         6-8, 0-2 (denies 5)
    2        Weak relay (often 15-17)
     2       4
     2       2 (not 4)
     2NT       Not 4 and not 2 (often 1-3-X-X)
     3       6-crd
     3       6-crd
    2        5+
    2        6+
    2NT        Strong relay (18+), often bal
    3        5+, 18+hcp
    3        5+, 18+hcp
    3        5+, 18+hcp
    3        6+, 18+hcp
   2         6-8, exactly 3
   2         6-8, 5 (denies 3)
   2         3-5, 4+
   2NT         5/5, 6-8hcp (0-2)
   3         HHxxxx
   3         HHxxxx
   3         6-8, 6 & 3
   3         6-8, 4+ (no singleton)
   3NT         Unknown singleton w/4+
   4         Void, 4+
   4         Void, 4+
   4         Void, 4+
   4         Many trumps (No singleton or void)
  1NT          17-18
   2         Stayman
   2         
   2         
   2         Weak with either minor
   2NT         
   3         
   3         
  2          15-18, 5+, unbal (denying 4)
   2         
    2        
    2        Singleton
    2NT        
    3        
    3        Singleton
   2         
   2         
   2NT         
   3         
   3         Singleton w/good supp.
   3         Singleton w/ good supp.
   3         Singleton w/ good supp.
  2          15-18, 5+, unbal (denying 4)
   2         
    2        4
    2NT        
    3        4+
    3        
   2         
   2NT         
   3         
   3         
   3         Splinter
   3         Splinter
   4         Splinter
  2          (18)19-21, 5+, unbal (denying 4)
  2          (18)19-21, 6+in-a-unknown-mi (denying 4crd MA)
  2NT          (18)19-21, at least 5-4 in mi
   3         
   3         
   3         
   3         
  3          (18)19-21, (5)6+ & 4
   3         Relay
    3        
    3        
    3NT        
   3         
   3         
   3NT         
  3          (18)19-21, (5)6+ & 4
  3          Solid or semi-solid suit (18-20)
  3          Solid or semi-solid suit (18-20)
  3NT          Often solid minor with side stoppers

  1            Opps Bid
  Pass          0-5
  1          Bal or 5+
  1          
  1NT          5+
   2         Stayman
   2         
   2         
   2         
  2          5+
   2         
  2          Weak-Two in a major
  2          Any 4-4-4-1 hand
  2          Any 5-4-4-0 hand
  2NT          Preempt in
  3          Preempt in
  3          Preempt in
  3          Preempt in
  3          Any solid 7-crd suit

  1            1) 5+ OR 2) bal-hand
  1          Relay - asking
   2         Bal
    2        Stayman-ish
     2       4-5, Bal
     2       4 (denying 4)
     2NT       Any 4-4-4-1 hand w/ singleton A or K
      3      Relay
     3       x-x-4-4
     3       5332 type
     3       5332 type
     3       3-3-3-4 or 3-3-4-3, 9-12
     3NT       3-3-3-4 or 3-3-4-3, 13-14
     4       3-3-3-4, 15+
     4       3-3-4-3, 15+
   2         5 & 4
   2         5 & 4
   2         5 & 4
   3         5 & 5
   3         5 & 5
   3         6 (one suiter)
   3         6 & 5
  1NT          Often 17-18 bal
  2          6
  2          6
  2          6
  2          6
  3          Strong 7-crd suit (one suiter)
  3          Strong 7-crd suit (one suiter)
  3          Strong 7-crd suit (one suiter)
  3          Strong 7-crd suit (one suiter)

  1            Opps Bid
  Pass          No bid or Penalty(5+)
  1          Bal/semi-bal (denying 4+), 6+hcp
  1NT          nat., 6-8(9)
   2         Stayman
   2         
   2         
   2         
  2          6+hcp
   2         
  2          6+hcp
  2          5 & 5mi (Michaels)
  2          5-8hcp
  2NT          nat.
  3          Strong 6crd suit (one-suiter)
  3          Strong 6crd suit (one-suiter)
  3          Michaels
  3NT          nat.

  1            5+
  1NT          Not necessarily bal.....but probably no 6-crd suit ;-)
  2          
  2          
  2          
  2          
  2NT          4+crd support (Bekkasin)
  3          Mini-Splinter
  3          Mini-Splinter
  3          Mini-Splinter
  4          Voidwood
  4          Voidwood
  4          Voidwood

  1            Opps Bid
  Pass          1)No bid OR 2)Penalty
  1NT          Nat., 6-8(9)
   2         Stayman
   2         
   2         
   2         
  2          5+, 6+hcp
   2         
  2          5+, 6+hcp
  2          
  2          5 & 5mi (Michaels)
  2NT          Nat.
  3          Strong 6crd suit (one-suiter)
  3          Strong 6-crd suit (one-suiter)
  3          Strong 6crd suit (one-suiter)
  3          Michaels
  3NT          Nat.

  1NT            5+
  2          Waiting
   2         
   2         
   2         
   3         
   3         Mini-Splinter
   3         Mini-Splinter
   3         Mini-Splinter
  2          
  2          
  2          
  3          

  1NT            Opps Bid
  Pass          No bid
  D          Penalty in at least one minor
  2          5 & 4, 6+hcp
   2         
  2          5 & 4, 6+hcp
  2          
  2          
  3          4+ & 4+ w/short
  3          4+ & 4+ w/short
  3          Strong 6crd suit (one-suiter)
  3          Strong 6crd suit (one-suiter)
  4          5+ & 5+ w/short
  4          5+ & 5+ w/short
  4          
  4          

  2            5+
  2          Waiting
   2         
   2         
   3         
   3         
  2          
  2          
  3          
  3          

  2            Opps Bid
  Pass          1) No bid or 2)Penalty
  D          Neg.dbl., 6+hcp
  2          6+hcp
  2          
  2          
  2NT          Nat.
  3          5 & 5 (Michaels)
  3          
  3          
  3          
  3NT          nat.
  4          5+ & 5+ (Michaels)

  2            Multi (Weak-Two in a major) 6-8hcp

  2            Opps Bid
  Pass          1) No bid or 2) Penalty
  2          
  2          
  2NT          Nat.
  3          
  3          5 & 5 (Michaels)
  3          
  3          
  3NT          Nat.
  4          6 & 5MA
  4          5+ & 5+ (Michaels)

  2            Opps Bid
  Pass          1) No bid or 2) Penalty
  2          Bal/semi-bal (denying 4+)
  2NT          Nat.
  3          
  3          
  3          5 & 5mi (Michaels)
  3          
  3NT          Nat
  4          5+ & 5+mi (Michaels)

  2            Any 4-4-4-1 hand (unknown singleton)
  2          
   2NT         Single
    3        Control ask w/ support
     3       0-2 controls
     3       2 controls (2 kings)
     3       3 controls
     3NT       4 controls
     4       5 controls
     4       6 controls
    3        Control ask w/ support
     3       0-2 controls
     3       2 controls (2 kings)
     3NT       3 controls
     4       4 controls
     4       5 controls
    3        Control ask w/ support
     3       0-2 controls
     3NT       2 controls (2 Kings)
     4       3 controls
     4       4 controls
     4       5 controls
     4       6 controls
   3         Single
    3        Control ask w/ support
    3        Control ask w/ support
    3        Control ask w/ support
   3         Single
    3        Control ask w/ support
    3        Control ask w/ support
    4        Control ask w/ support
   3         Single
    3        Control ask w/ support
    4        Control ask w/ support
    4        Control ask w/ support

  2            Any 5-4-4-0 hand (unknown void)
  2NT          Relay - asking
   3         X-X-X-0 type
   3         X-X-0-X type
   3         X-0-X-X type
   3         0-X-X-X type

  2            Opps Bid
  Pass          1) No bid or 2) Penalty
  2NT          Nat.
  3          
  3          
  3          
  3          5 & 5mi (Michaels)
  3NT          Nat.
  4          Decent 7crd suit, 6-9hcp

  2NT            Preempt in
  3          
   3         
    3        Control ask w/ support
    3        Control ask w/ support
    4        Control ask w/ support
   3         
    3        Control ask w/ support
    4        Control ask w/ support
    4        Control ask w/ support
   3         
    3NT        Nat.
    4        Control ask w/ support
    4        Control ask w/ support
    4        Nat. (not forcing)
    4        Control ask w/ support
   3NT          void (9-12)
    4        Puppet to 4
     4       Forced!
      4      Nat. (not forcing)
      4      Nat. (not forcing)
    4        Control ask w/ support
    4        Control ask w/ support
    4        Control ask w/ support
   4         13+
    4        Control ask w/ support
    4        Control ask w/ support
    4        Control ask w/ support
    4NT        Nat.

  2NT            Opps Bid
  Pass          No bid
  D          At least penalty in one of the minors
  3          5 & 4
  3          5 & 4
  3          
  3          
  3NT          Nat.
  4          5+ & 5+
  4          5+ & 5+

  3            Preempt in

  3            Opps Bid
  Pass          1) No bid or 2)Penalty
  3          
  3          
  3          
  3NT          Nat.
  4          5+ & 5+
  4          6 & 5+in-a-major

  3            Preempt in

  3            Opps Bid
  Pass          1) No bid or 2)Penalty
  3          
  3          
  3NT          Nat.
  4          
  4          5+ & 5+

  3            Preempt in

  3            Opps Bid
  Pass          1)No bid or 2)Penalty
  3          
  3NT          Nat.
  4          
  4          
  4          5+ & 5+ in-a-minor

  3            Opps Bid
  Pass          No bid
  3NT          Nat.
  4          
  4          
  4          
  4          

  3            Any solid 7+crd suit

  3NT            (If minors?) Same as against 1N, 2N.

  4            Opps Bid
  D          GF, take-out, cards

  4            Opps Bid
  D          GF, take-out, cards

  4            Opps Bid
  D          GF, take-out, cards

  4            Opps Bid
  D          Penalty
  4NT          Take-out (like a take-out dbl w/ max 1 )

  4NT            Opps Bid
  Pass          No bid
  D          Penalty in at least one og the minors
  5          
  5          


After bidding 1
  D            Opps Bid
  RD          11+, Penalty-oriented
  1          
  1NT          7-10
  2          
  2          
  2          
  2          
  2NT          
  3          5+ & 5+
  3          5+ & 5+
  3          3-1 in majors
  3          1-3 in majors
  3NT          

  1            
  1          
   1NT         
   2         4th suit
   2         
   2         
   2         Usually 4 spades
   2NT         
   3         5 & 5
   3         
   3         
   3         
  1NT          11-13 bal
  2          5-4 either way in minors (or 5-5)
   2         
   2         
   2         4th suit
   2NT         
   3         
   3         Usually four diamonds
   3         
  2          
   2         
   2         Ostensibly natural, maybe NT probe, adv cue for or waiting
   2NT         
   3         Onstensibly natural, maybe NT probe or adv cue for
   3         
   3         
   4         
  2          
  2          Splinter bid
  2NT          6-7, max
  3          Splinter bid
  3          Splinter bid
   3         
   3         Notrump probe or advanced cue
  3          
  3          
  4          
  4          

  1            Opps Bid
  D          4 or any GF without 5+ (if not a passed hand)
  1NT          
  2          
  2          
  2          
  2          
  2NT          
  3          5+ & 5+
  3          5+ & 5+
  3          Solid minor ask for stopper
  3NT          

  1            
  1NT          11-13 bal, singleton is possible
  2          5-4 either way in minors (or 5-5)
  2          
   2         
   2         
   2NT         
   3         Can be a notrump probe or adv cue for
   3         
   3         
   3         
  2          5-6 & 4, max
  2          
  2NT          6, max
  3          Splinter bid
  3          Splinter bid
  3          Splinter bid

  1            Opps Bid
  D          1) Neg. w/4-5 OR 2) Any GF (if not a passed hand)
  2          
  2          
  2          
  2          
  2NT          
  3          5+ & 5+
  3          5+ & 5+
  3          
  3          Solid minor, ask for stopper

  1NT            7-10

  2            Opps Bid
  D          At least one 4+crd major
  2          
  2          
  2NT          
  3           raise
  3          

  2            GF, except if rebid 3
  2          Extra length and/or minimum hand
  2          
  2          
  2NT          
  3          
  3          

  2            GF, except if rebid 3

  2            Opps Bid

  2            Weak-two

  2            Weak-two

  2            Opps Bid

  2NT            11-12, no 4-crd major

  3            5+ & 5+, 9-11

  3            5+ & 5+,

  3            Typical 3-1 in majors and (54) in minors

  3            Typical 1-3 in majors and (54) in minors

  3NT            13-15(16), nat.


After bidding 1
  D            Opps Bid
  1NT          7-11
  2          
  2          
  2          Invitational in
  2NT           supp.
  3           supp., 10-12
  3           supp, 6-9
  3          

  1            Opps Bid

  1            
  1NT          
   2         
   2         Usually six spades
   2NT         
   3         
   3         Usually four diamonds
   3         
   3         
  2          
   2         4th suit
   2         Possibly false preference
   2         
   2NT         
   3         
   3         
   3         
   3         
   4         
  2          
   2         Possibly false preference
   2         
   2NT         
   3         4th suit
   3         
   3         
   3         
   4         
  2          
   2         
   2NT         
   3         
   3         Usually four diamonds
   3         
   3         
  2          
  3          
   3         4th suit
  3          
  3          
  3          

  1NT            8-13
  2          
   2         5+
   2         
   2         5+, max
   2NT         11-13
   3         5+, min
  2          
   2         
   2         5+, max
   2NT         11-13
   3         
   3         5+, min
  2          
  2          
  3          

  2            GF, except if rebid 3
  2          
  2          Minimum and/or extra length
  2          
  2NT          
  3          
  3          
  3          

  2            Opps Bid

  2            Opps Bid

  2            GF, except if rebid 3
  2          
  2          
  2NT          
  3          
  3          
  3          

  2            
  2          Opener must bid 2N
   2NT         Forced
    3        Trial-bid in
    3        Trial-bid in
    3        Trial-bid in
  2NT          Short suit trial-bid in
  3          Short suit trial-bid in
  3          Short suit trial-bid in

  2            Limit raise in

  2NT            GF w/support

  3            10-12 w/support

  3            6-9 w/support

  3            

  3            Unknown singleton w/support

  3NT            Support w/void in

  4            Support w/void in

  4            Support w/void in

  4            In principle preemptive but can be quite strong


After bidding 1
  D            Opps Bid
  1NT          7-11
  2          
  2          
  2          
  2NT           supp
  3           supp, 10-12
  3           supp, 6-9
  3          Invitational in
  3          

  1NT            8-13

  2            GF, except if rebid 3
  2          
   2         4th suit
  2          
  2          Extra length and/or minimum
  2NT          
  3          
  3          
  3          

  2            Opps Bid

  2            GF, except if rebid 3
  2          
  2          Minimum and/or extra length

  2            Opps Bid

  2            GF, except if rebid 3
  2          Minimum and/or extra length
  2NT          
  3          
  3          
  3          

  2            Opps Bid

  2            
  2NT          Opener must bid 3
   3         Forced
    3        Trial-bid in
    3        Trial-bid in
    3        Trial-bid in

  2NT            GF w/support

  3            10-12 w/support

  3            6-9 w/support

  3            10-12 w/support

  3            

  3NT            GF w/support, unknown singleton

  4            Void

  4            Void

  4            Void

  4            Preemive in nature but can be quite strong


After bidding 1NT
  D            Opps Bid
  Pass          Nat. - no better bid.
  RD          Weak two-suiter
   2         
    2         and a major
     2       Pass or correct
    2        Majors
   2         
   2         
   2         
  2          
  2          
  2          

  2            Puppet Stayman
  2          No 5-crd major
   2         4
   2         4
   2NT         Denying 4-crd majors
   3         
   3         
  2          
  2          
  2NT          No majors, min
  3          Max
  3          Max
  3NT          No majors, max

  2            Opps Bid

  2            Opps Bid

  2            

  2            Opps Bid

  2            

  2            Opps Bid

  2            Minor Stayman
  2NT          No minor w/ Hxxx or better
   3         Both minors (5-5), sign-off
   3         
   3         Shortness
   3         Shortness
  3          Hxxx or better in
   3         
   3         Shortness
   3         Shortness
  3          Hxxx or better in
   3         Shortness
   3         Shortness

  2NT            Transfer to 3 (Very often sign-off in but could be a GF with a Marmic hand)
  3          Forced ;-)
   3         4-4-1-4 (singleton )
   3         4-1-4-4 (singleton )
   3         1-4-4-4 (singleton )
   3NT         4-4-4-1 (singleton , 10-12)
   4         4-4-4-1 (singleton , 13+)

  3            

  3            

  3            3-1 in majors (54 in minors)

  3            1-3 in majors (54 in minors)

  3NT            

  4            1430

  4            

  4            

  4            6-5 in minors


After bidding 2
  D            Opps Bid
  2          Relay ask
  2          
  2          
  2NT          Transfer to 3
  3          Transfer to 3
  3          Short
  3          Short
  3          Short

  2            Ask for major
  2          
   2         Can be nat. or can be a stopper
   2NT         
   3         
   3         Can be nat. or can be a stopper.
   3         
   3         Splinter
   4         
   4         Splinter
   4         
   4         Voidwood
   4NT         1430
   5         Voidwood
  2          
   2NT         
   3         
   3         Can be nat. or can be a stopper
   3         Can be nat. or can be a stopper
   3         
   4         
   4         Splinter
   4         Splinter
   4NT         1430
   5         Voidwood
   5         Voidwood
  2NT          
   3         
   3         Maybe nat. or maybe a stopper
   3         Maybe nat. or maybe a stopper
   3         Maybe nat. or maybe a stopper
  3          
   3         Ostensibly natural but can be a notrump probe
   3         Nat. or stopper
   3         Nat. or stopper
  3          
  3          
  3          

  2            Opps Bid
  2          
  2          
  2NT          
  3          
  3          
  3          
  3          
  4          

  2            Opps Bid
  2          
  2NT          
  3          
  3          
  3          
  3          
  3NT          
  4          

  2            
  2          0-2
   2NT         Nat. not forcing
   3         Nat. not forcing
   3         GF
   3         
  2NT          1-2, min.
  3          0-2, min
  3          max.
  3          
  3          Splinter
  3NT          1-2, Nat., max
  4          Splinter
  4          Nat.

  2            Opps Bid
  2NT          
  3          
  3          
  3          
  3          
  4          

  2            
  2NT          1-2, min.
   3         Not forcing
   3         GF
   3         
   3         
  3          0-2, min.
   3         GF
   3         
   3         
  3          0-2, max.
  3          0-2, max.
  3          Nat.
  3NT          Nat. max.
  4          Splinter
  4          Splinter
  4          Nat.

  2NT            Puppet to 3 1) Preempt in or 2) 5-5 hand, GF

  3            Puppet to 3 1) Weak hand w/long or 2) Slam try w/ a 6-crd suit.

  3            Short

  3            Short

  3            Short

  3NT            Nat.

  4            

  4            1430

  4            To-play

  4            To-play


After bidding 2
  D            Opps Bid
  Pass          5+
  2          
  2          
  2NT          Relay ask
  3          
  3          
  3          p/c
  3          p/c
  4          Opener bids the suit under his major
  4          To-play
  4          To-play

  2            p/c

  2            Opps Bid
  2NT          Relay

  2            Opps Bid
  2NT          Realy

  2            p/c

  2NT            Relay ask
  3          Any max. (Unknown suit)
  3           suit, min.
   3         
   3         
   4         
  3           suit, min.
  3          AKQxxx in
  3NT          AKQxxx in

  2NT            Opps Bid

  3            

  3            Opps Bid
  3          

  3            Opps Bid

  3            

  3            p/c

  3            p/c

  3NT            

  4            Opener bids the suit under his major

  4            To-play

  4            To-play


After bidding 2
  2            

  2NT            Opps Bid

  2NT            Ask for quality
  3          1 top honnor in
  3          2 top honnors in and feature
  3          2 top honnors in and feature
  3          2 top honnors in and feature
  3NT          AKQxxx

  3            

  3            Ask for 3-crd MA
  3          
  3          
  3NT          No 3-crd MA

  3            


After bidding 2
  2NT            Opps Bid

  2NT            Ask for quality
  3          2 top honnors in and feature
  3          1 top honnor in
  3          2 top honnors in and feature
  3          2 top honnors in and feature
  3NT          AKQxxx

  3            Ask for 3-crd MA
  3          No 3-crd MA
  3          
  3          
  3NT          No 3-crd MA (AKQxxx)

  3            

  3            

  3            


After bidding 2NT
  3            

  3            

  3            

  3            

  4            


After bidding 3
  3NT            Opps Bid


After bidding 3
  3NT            Opps Bid


After bidding (1)
  1            1) 10-14, 0+, often 11-13 bal 2) If a passed hand: 8-11 w/5+

  1            1) 9-14 2) If a passed hand: 7-10

  1            1) 9-14 2) If a passed hand: 7-10

  1NT            1) 14-16 2) If a passed hand: 7-10 w/5-5 in minors

  2            1) 10-14 2) If a passed hand: 7-10 w/both majors (5-4 or better)

  2            1) Multi (Weak-Two in-a-major) 2) If a passed hand: Preempt w/6+

  2            1) Bad preempt in 2) If a passed hand: Preempt in

  2            1) Bad preempt in 2) If a passed hand: Preempt in

  2NT            1) Good preempt in 2) If a passed hand: Preemt in minors (6-5)

  3            1) God preempt in 2) If a passed hand: Preempt in

  3            1) suit 2) If a passed hand: Preempt in

  3            1) suit 2) If a passed hand: Preemt in

  3            1) Any solid minor 2)If a passed hand: Preemt in

  4            

  4            


After bidding (1NT)
  2            Both majors - at least 5-4

  2            6crd in unknown major

  2            5+ & 4+ in unknown minor

  2            5+ & 4+ in unknown minor

  2NT            5+ & 5+ or any strong 2-suiter


After bidding (1)
  2NT            5+ & 5+

  3            5+ & 5+


After bidding (1)
  2NT            5+ & 5+

  3            5+ & 5+


After bidding (1)
  2NT            5+ & 5+

  3            5+ & 5+


After bidding (2)
  2            (if 2 is "strong") Multi

  2            (If 2 is "strong") 5-5 in / OR /

  2            (If 2 is "strong") 5-5 in / (reds) OR 5-5 in / (blacks)

  2NT            (If 2 is "strong") 5-5 in minors OR 5-5 in majors

Defensive bidding
Bidding diagrams
(1)Opps Bid
(1)Opps Bid
(1)Opps Bid
(1)Opps Bid
(1NT)Opps Bid
(2)Opps Bid


After bidding 1
 (D)        Opps Bid
  RD       3-5
  1       6-8
   1      16-21 Usually 5+ s
    1     
    1NT     
    2     
    2     
    2     
    2     Three-suited
    2NT     3-suited short in hearts
    3     Three-suited
    3     3-suited
   1      16-21 HCP. Usually 5+ s
    1NT     
    2     
    2     
    2     
    2     
    2NT     3-suited short in hearts
    3     Three-suited
    3     3-suited
    3     Three-suited
   1NT      16-18
    2     Stayman
    2     
    2     
    2     Weak with either minor
    2NT     
    3     
    3     
   2      16-21
    2     
    2     
    2     
    2NT     
    3     
    3     Three-suited
    3     Thre-suited
    3     Three-suited
   2      16-21 HCP
   2      
   2      
   2NT      19-21
    3     Stayman
    3     
    3     
   3      
   3      
   3NT      24-27
  1       Bal or 5+
  1       
  1NT       5+
   2