My 2/1 gameforcing framework

[junyi_zhu]

Playing 2/1 gameforcing, many players don't really have an agreement on the further development once responder makes a two over game forcing response. It's necessary to understand the basic principle of two over one gameforcing structure.

 

Instead of the traditional fast arrival principle, two over one game forcing structure provides a new slow arrival principle. That means once the 2/1 gameforcing situation has been set up, all unneccessary jumps show extra value and mild slam interest. According to this first principle,

the following statements are all induced from it.

 

1 a jump raise to opener's first suit shows slam interest and demands

cuebid from partner. a serious 3NT convention may apply here, so

3NT shows serious slam interest, 4 level cuebids show minimum hand.

example: 1S-2C-2D-3S: slam interest, inviting pd to cuebid.

2 a double raise to opener's first suit shows mild slam interest,

denies side suit controls, 2/1 suit garantees a good 5 card suit.

example: 1S-2C-2D-4S. SAKxx Hxx Dxx CAQJxx

3 a simple raise to opener's first suit shows either a minimum hand or

a hand doesn't justify the above biddings.

4 a jump rebid shows solid suit and slam interest.

(partnership agreement may also play it to show at most one trump

loser? This bid sets up trumps and demands cuebid. serious

3NT also applies here.

example: 1S-2C-3S: SAKQJxx HAxx Dxxx Cx

5 a double jump rebid shows solid suit, denies serious slam interest.

(partnership may also play it to show at most one trump loser)

this bid denies out side aces. may have side suit K or stiff,

I recommend it denies two side suit controls.

example: SAKQJxxx HQxx Dxx Cx, 1S-2C-4S.

5 a two level rebid shows either minimum or 6+ in suit.

6 a low reverse(reverse at 2 level) or a high reverse(new suit at 3 level)

shows extra value.

7 a jumpshift at 3 level is splinter.

8 a 2NT rebid shows minimum, balanced or 18-19, balanced.

9 a 3NT jump rebid shows 15-17, balanced.(not good for 1NT opening)

10 a single raise shows either extra value or good support with minimum hands

example: 1S-2C-3C: SAxxxx Hxx Dxx CAKxx, the quality of c suit justifies the raise.

11 a 2NT rebid by responder is just a relay, usually shows minimum hands or

strong balanced hands.

asking for more details.

opener can bid naturally at 3 level.

over 1S 2C 2S 2NT, 3 level the other major shows

6 card major suit and extra value.

12 a three level new suit by responder shows extra value.

13 a three level rebid by responder shows extra value.

14 a 3NT rebid by responder shows 15-17, balanced hands.

15 a 4th suit bid is natural and shows extra value.

 

within this framework, we now may have a partnership agreement

on how to stop at 4 level minor.

 

When both sides show minimum, 4 level minor is passable:

1S 2D

2S 2NT(relay)

3D 4D(invitational)

 

1S 2D

2S 3D

4D(forcing! because 3D sets up gameforcing sequence)

 

1S 2D

2S 2N(relay)

3C 4C(invitational)

 

1S 2D

2S 3C

4C(forcing! because 3C shows extra)

 

1S 2D

2H 2N(relay)

3D 4D(invitational)

 

1S 2D

2H 2N(relay)

3C 4C(forcing! 4th suit by declarer also shows extra)

 

1S 2D

2S 2N

3D 3S

4D (invitational, because 2NT then 3S doesn't garantee extra)

 

1S 2D

2S 2N

3D 3H

4D(invitational, because 3H here doesn't garantee extra, it shows

stopper in H and asking partner if 3NT is possible.)

 

I have played this structure with Greg Hinze, it works well.

the 2NT relay convention may have some drawback in positional issue

for 3NT. However, the gain of bidding space is great.

[Rado]

Welcome Junyi to BBO forums,

I've just briefly read your post abt 2/1 and found it quite same with the principles we apply here when playing 2/1 FG unless suit rebid. I've made a copy for thorough study of your sequences when more free time (I'm at work now LOL). By the way I think that forums are as much intersting as playing at BBO, big fun !

 

Junyi, please invite Greg to join the forums

 

Best regards,

Rado