This blog provides supplementary thoughts and ideas to the site. If you haven't seen the main site, there is a lot there including the Martel and Rodwell interviews, photos, and articles. This blog is focused on advancing bridge theory by discussing the application of new ideas. All original content is copyright 2009 Glen Ashton.

Thursday, April 06, 2006

Update to Kaplanville

Since the last post I've tinkered with the mappings, to produce the following. To see this with suit symbols, see:

The structure, keeping 2[CL] rebid for a minor or balanced, often 15+.

After 1[HE]-1[SP]:

1NT: Maximum of 14. Balanced or with exactly a four card minor (not 0-5-4-4). Now 2m is to play, 2[SP] is an artificial game force, 2[HE] an invite with 2[HE]s and (or poor invite with 3[HE]s), 3X natural invite.

2[CL]: Four or longer minor and 14/15+, or five or longer minor any strength, or 0-5-4-4 any strength or 15+ balanced. Structure below.

2[DI]: 4+[SP]s, up to 16 (not 5[SP]s if 14-16).

2[SP]: 4+[SP]s, 16/17-18 if 4[SP]s, 14-16 if 5+[SP]s.

2NT: 6/7[HE]s and no void/small singleton 19+, or 5+[HE]s and 4+[SP]s and 19+. Now 3[HE] asks if 4[SP]s, with 3[SP] saying yes and 3NT no. 3[CL] asks hand type, with 3NT denying 4[SP]s and 3X shape showing with 4[SP]s (3[DI] if 4-5-2-2). 3NT is to play, 3[DI] shows long [CL]s and 3[SP] shows long [DI]s.

3[CL]/[DI]: 16/17+ with 6+[HE]s and void/small singleton in suit bid and no other four card or longer suit. 3[HE] is non-forcing but opener bids again with extras.
3[HE]: 16/17-18 with 6+[HE]s, no singleton or [SP] void/small singleton and no other four card or longer suit. 3[SP] asks if short, 3NT says no.
3[SP]: 18/19+ with 6+[HE]s and [SP] void/small singleton and no other four card or longer suit.
3NT: 18+ with solid suit, stoppers or semi-stoppers in other suits.
4[CL]/[DI]: Distributional 6-5 or better, good playing value but not strong.

After 1[HE]-1[SP]--2[CL]:

Pass: Possible with long [CL]s and awful hand.
2[DI]: Up to 9, 4+[DI]s or 3[DI]s and short [HE]s. If 6+[DI]s quite weak Now:
**** Pass: 4+[DI]s, no game interest.
**** 2[HE]: 4[CL]s with 15-18 or 5+[CL]s up to 16 or balanced 15-18. 3[CL] to play and 3[DI] weak with long [DI]s. 2NT is a non-forcing game try with 4/5[CL]s. 2[SP] asks, 2NT shows 15-16, 3[CL] 5-5 not max, 3[DI] if 4[CL]s 17-18, 3[HE] if 6-4, 3[SP] if 5-5 maximum, and 3NT if 17-18 balanced.
**** 2[SP]: 4+[DI]s and game interest, forcing just to 2NT.
**** 2NT: Balanced or semi-balanced hand with good game interest, about 18/19-20.
**** 3[CL]: 18/19+ game force with 4+[CL]s. 3[DI] asks hand type.
**** 3[DI]: 17/18+ game force with 5+[DI]s.
**** 3[HE]: 6+[HE]s and 4+[DI]s, game forcing (bid 2[SP] first if lesser values).
**** 3[SP]: 5-5+ with [CL]s, game force.
**** 3NT: To play.

2[HE]: Up to 9, 2[HE]s & 4-5[CL]s. Now:
**** Pass: 4+[DI]s or balanced, no game interest.
**** 2[SP]: Shows [CL]s suit or fragment, could be 2 or 3 only if game force. Asks responder to bid 2NT if maximum, 3[CL] if minimum, then opener bids 3[CL] to signoff (or passes 3[CL]) or bids 3X to shape out, 3[DI] being a suit or a stopper.
**** 2NT: Balanced or semi-balanced hand with game interest, about 17-18.
**** 3[CL]: 3[CL]s (often with 4+[DI]s), game invite.
**** 3[DI]: 5+[DI]s game invite.
**** 3[HE]: Game invite with 6[HE]s.
**** 3[SP]: 5-5+ with [DI]s, game force.
**** 3NT: To play.

2[SP]: Most hands with 9/10+ (see 2NT and 3[HE]+ alternatives). Now:
**** 2NT asks, not super shapely except can be 5-5 non-game force with [CL]s. Responder bids:

******** 3[CL]: Nothing to say. Now opener can pass if minimum 5-5 or bid 3NT to play, or bids 3[HE] to show [CL]s or 3[SP] to show [DI]s or re-asks with 3[DI]: 3[HE] says fairly flat, and now 3[SP] asks if extras (3NT=no), 3[SP] shows 5[DI]s, 3NT shows 6+[DI]s with 3[CL]s.
******** 3[DI]: 6+[DI]s and fewer than 3[CL]s.
******** 3[HE]: 5[CL]s. 3[SP] asks if 4[DI]s (3NT says no).
******** 3[SP]: 6+[CL]s.
******** 3NT: Maximum without 5+[CL]s. Opener can now continue with natural slam try.
******** 4[CL]: 6+[CL]s and 4+[DI]s.
******** 4[DI]: 6+[DI]s and 4[CL]s.

**** 3[CL] shows 5-5 in the reds, not forcing - responder can pass with long [CL]s or bid 3[DI] with a fit/semi-fit.
**** 3[DI] shows 4+[DI]s, game force, and either 5-5 or 6-4. 3[HE] asks, and 3[SP] shows 5-5, all other bids showing 6-4 or better.
**** 3[HE] shows 4+[CL]s, game force, and either 5-5 or 6-4. 3[SP] asks, and 3NT or 4[CL] shows 5-5 (the latter with considerable extras), all other bids showing 6-4 or better.
**** 3[SP] shows weak doubleton [SP] or shorter, asks partner to bid 3NT with [SP]s stopped or to explore for a best minor suit game or slam.
**** 3NT to play, responder should pass even with 12.
**** 4[CL]/[DI] with big 6-5+.
**** 4[HE] with 6+[HE]s, 4[CL]s and 18/19+.

2NT: 10+ with 4-2-2-5 exactly and a hand that wants to play 2NT opposite 5[DI]s up to 13.
**** 3X is now natural and forcing to 3NT or 4X.

3[CL]/[DI]: Six or longer suit, up to bad 9. 3X by opener is now forcing to 3NT.

3[HE]: Game invite with 3[HE]s. Opener only passes with minimum 5-5.

3[SP]: 5-5 in the minors, 9/10+.

3NT: Game going with 3[HE]s - offers opener the chance to try for slam by cuebidding.

4[CL]/[DI]: 6-5 or better in the minors, 9/10+.


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