Bridges

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Inverted Minors

1C-2C; 2D F1

2M F1

2NT nonforcing

3C nonforcing

3D splinter

3M splinter

3NT 18-19 Bal

(1m-2m; 2NT/3m and 1m-2m; 2X-2NT/3m are the only nonforcing sequences.)

1D-2C; 2D nonforcing (2NT/3C follow-up is nonforcing)

2M GF

2NT nonforcing (3C follow-up is nonforcing)

3C nonforcing

3D Nat

3M splinter

3NT 18-19 Bal

1m-2NT; 3C puppet to 3D (to show 4-card Major)

3D splinter in om

3M splinter

Two-Way Checkback

1m-1M; 1NT- 2C puppet to 2D, usually to s/o

2D Art, GF

2M Inv

2NT puppet to 3C, usually to s/o

3C slam try

3D slam try

3M slam try, sets trump

4m splinter

1m-1M; 1NT-2C; 2D- 2M s/o

2NT 11-12 Bal, Inv

3C Inv

3D Inv

3S Inv to 3NT

3NT mild slam try

4m void

Wolff

1m-1M; 2NT- 3C Art, asks for 3-card M (could also be s/o attempt)

3D Art, GF with m support

3M GF, 6+M

4M slam try

Blackout

1C-1S; 2D- 2H Art, weak (cheapest bid of 4th suit / 2NT)

2S 5+♠

2NT Art, GF

Spiral

1C-1H; 2H-2S; 2NT 3♥, min

3C 3♥, max

3D 4♥, min

3H 4♥, max

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Major Opening Structure

1H- 1S Nat

1NT F1

2m GF except for 1H-2m; 2H-3m / 1S-2m; 2M-3m

2H 8-10

2S 4+♥, Jacoby Raise

2NT 4+♥, Splinter Raise, just GF

3C 4+♥, Inv

3D 4+♥, Mixed Raise

3H preemptive

3S 4+♥, strong Splinter Raise

3NT 4+♥, void in ♠

4m 4+♥, void in m

Forcing NT

1S-1NT; 2C 2+♣ or 16+ any

2D 4+♦, 12-15

2H 4+♥, 12-15

2S 6+♠, 12-15

2NT single-suited, 7-8 playing tricks

3m 5♠ & 5m, 12-15, concentrated values

3S single-suited, 6-7 playing tricks

1H-2H; 2S Art, game try (asks for secondary values)

3m Nat, slam try

3H 6+♥, Inv to 3NT

4m splinter, slam try

1H-2H; 2S- 2NT secondary values in ♠

3C secondary values in ♣

3D secondary values in ♦

Both the game try structure here and Spiral adhere to the principle of concealing the closed hand.

Transfer Responses after Double

1H-(Dbl)- Rdbl Forcing to 2NT

1S Nat

1NT ♣

2C ♦

2D ♥, Constructive Raise

Gazzilli

1S-1NT; 2C- 2D GF opposite any 16+

2H 5+♥, weak

2S 1+♠, weak

2NT minors, weak

3C 6+♣, weak

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NT Structure

(Systems on only after artificial doubles and artificial 2C overcalls with no anchor)

1NT- 2C Stayman

2D ♥ (bid worthless doubleton to superaccept, retransfers are on)

2H ♠

2S ♣ (2NT superaccept)

2NT ♦

3C Puppet Stayman

3D 5♦ & 5♣

3H splinter, 31(54)

3S splinter, 13(54)

3NT 9-14