lycier Posted December 13, 2013 Report Share Posted December 13, 2013 [hv=sn=lycier&s=SKJ84HAK96DAT7CT7&wn=机器人&w=ST32HQJT8D9862CK2&nn=机器人&n=SH743DKQ5CAQJ8654&en=机器人&e=SAQ9765H52DJ43C93&d=w&v=o&b=12&a=P1C(Minor%20suit%20opening%20--%203+%20C%3B%2011-21%20HCP%3B%2012-22%20total%20points)2S(Aggressive%20weak%20jump%20overcall%20--%206+%20S%3B%209-%20HCP%3B%203+%20total%20points)D(Negative%20double%20--%204+%20H%3B%209+%20total%20points)3S(2+%20S%3B%2011-%20HCP%3B%2012-%20total%20points)PPD(2-%20C%3B%204+%20H%3B%2010+%20HCP%3B%20biddable%20S)P4H(3+%20C%3B%204+%20H%3B%2015-20%20total%20points)PPP&p=C9CTC2C8C7CKCAC3CQH5H6D6DAD9D5D3S4S2H7S9DQD4D7D8CJH2S8S3DJDTD2DKH4S7HAH8SJSTH3SQC5S5H9HTHQC6S6HK]499|350[/hv] 3♠ was overbid actually,down 5 tricks.but the GIB don't think so,we lost a good chance.No way to make penalty double for opp's overbid. Quote Link to comment Share on other sites More sharing options...
helene_t Posted December 13, 2013 Report Share Posted December 13, 2013 The problem is that your double is not a penalty double. You would double with for example xx-KQJx-AJxx-Kxx. With the hand given it is better to bid 3NT. GIB's choice of 4♥ is weird, though, especially given that it is described as showing 4♥. I can sympatize with GIB finding that 4♥ has the best EV in simulations, but bidding 4♣ would lead to a 4♥ contract on some of those hand on which 4♥ is right. Probably it would be best if GIB weeded out "incorrect" calls before performing the sims. Here, pass, 4♣, 5♣, 6♣ and 7♣ should be the only correct calls to consider. Edit: thanks cloa and antrax, I stand corrected. I suppose that South's double then transfers captainship so that North just simulates its way to the best spot. Quote Link to comment Share on other sites More sharing options...
cloa513 Posted December 13, 2013 Report Share Posted December 13, 2013 The problem is that your double is not a penalty double. You would double with for example xx-KQJx-AJxx-Kxx. With the hand given it is better to bid 3NT. GIB's choice of 4♥ is weird, though, especially given that it is described as showing 4♥. I can sympatize with GIB finding that 4♥ has the best EV in simulations, but bidding 4♣ would lead to a 4♥ contract on some of those hand on which 4♥ is right. Probably it would be best if GIB weeded out "incorrect" calls before performing the sims. Here, pass, 4♣, 5♣, 6♣ and 7♣ should be the only correct calls to consider.The second double says biddable spades- its not a penalty double double than nothing is. Quote Link to comment Share on other sites More sharing options...
Antrax Posted December 13, 2013 Report Share Posted December 13, 2013 helene, in GIB's weird system the second double actually shows a desire to penalize and 4+ spades. Quote Link to comment Share on other sites More sharing options...
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