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Keri in competition?

#1 User is offline   gwnn 

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Posted 2007-February-01, 19:54

I know many people here play Keri.. The question is, what happens after 4th (or even "sixth") hand intervention? Let's assume it just promises weak diamonds or various invitational hands (even 5cM's or 6 card semi-solidsuits), but not diamond slam tries. What are your general principles? "diamonds pass, otherwise bid"? :rolleyes:
... and I can prove it with my usual, flawless logic.
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#2 User is online   awm 

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Posted 2007-February-01, 22:02

Generally I find that takeout doubles work pretty well here. At least the double promises support for diamonds (among other suits) so we are still fairly safe with the diamond one-suiter. I would normally double a two-level overcall by 4th seat if holding the right shape (this is safer than balancing doubles by opener in auctions like 1NT-Bid-Pass-Pass for example because responder always has either diamonds or values).
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#3 User is offline   microcap 

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Posted 2007-February-01, 22:17

I play keri, but am lost a little---can you give me a sample sequence or two?
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#4 User is offline   gwnn 

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Posted 2007-February-02, 03:22

1NT-2-2-

2M=4 or 5 cards (see below)
2NT=bal invite (p/3NT)
3x=good 6 card suit (p/3NT/4M)

...-2M-
p=min, 4(3 if "suit-hand") card support
2 (M is obviously spades)=4 spades, dislikes hearts, min
2NT=dislikes M, min
3=minimum hand, but good 4 card support for M
3=max hand with 4m333
3=4 hearts, less than 4 spades if M=, max
3M=3 card support, max
3NT=max, no interest in majors

I think this is about everything.

The real biggie about this is 3 level 4th hand intervention.. opener shan't know what to do and if responder doubles and opener doesn't have a trump stack and neither is he max, we end up in a 3 level bad contract. If opener is max. and doesn't have a stopper, we may be missing a good 4-4 major fit... There are some serious issues here. Yea, game is less likely with intervention, and 4th hand intervention is rare and 6th hand intervention is even more rare, but I think it's still a definite issue... And Keri is a relatively popular convention so I think there has to be a logical solution for all of this.
... and I can prove it with my usual, flawless logic.
      George Carlin
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#5 User is offline   pclayton 

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Posted 2007-February-02, 13:18

If it starts 1N - p - 2 - 2x?

We play as Klinger suggests; double is penalty oriented but with diamond support in case pard is just transferring.

The tricky auctions are when overcaller's partner competes over our pass / double.
"Phil" on BBO
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#6 User is offline   Apollo81 

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Posted 2007-February-09, 11:03

awm, on Feb 2 2007, 12:02 AM, said:

Generally I find that takeout doubles work pretty well here. At least the double promises support for diamonds (among other suits) so we are still fairly safe with the diamond one-suiter. I would normally double a two-level overcall by 4th seat if holding the right shape (this is safer than balancing doubles by opener in auctions like 1NT-Bid-Pass-Pass for example because responder always has either diamonds or values).

Takeout doubles work very well in these auctions (from experience)
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