p_t_red Posted September 30, 2011 Report Share Posted September 30, 2011 North: ♣Q8 ♦QT3 ♥T962 ♠A976East: ♣J5 ♦K ♥J843 ♠KQT842South: ♣AT976 ♦A87654 ♥A ♠3West: ♣K432 ♦J92 ♥KQ75 ♠J5 The Auction:West North East South____ Pass Pass 1♦Pass 1♥ 1♠ 2♣Pass 2♦ 2♠ 3♦3♠ 3NT Pass PassPass Okay, the auction wasn't great. 8♠ lead by East.♠E8 S3 WJ NA♦N3 EK SA W2♦S8 W9 NQ ♥E4The problem here is that East played the King on the first diamond.Holding KJ the proper play on the first round is the Jack,so North has a "proven" finesse against West for the Jackon the second round. Quote Link to comment Share on other sites More sharing options...
cloa513 Posted October 1, 2011 Report Share Posted October 1, 2011 North: ♣Q8 ♦QT3 ♥T962 ♠A976East: ♣J5 ♦K ♥J843 ♠KQT842South: ♣AT976 ♦A87654 ♥A ♠3West: ♣K432 ♦J92 ♥KQ75 ♠J5 The Auction:West North East South____ Pass Pass 1♦Pass 1♥ 1♠ 2♣Pass 2♦ 2♠ 3♦3♠ 3NT Pass PassPass Okay, the auction wasn't great. 8♠ lead by East.♠E8 S3 WJ NA ♦N3 EK SA W2♦S8 W9 NQ ♥E4The problem here is that East played the King on the first diamond.Holding KJ the proper play on the first round is the Jack,so North has a "proven" finesse against West for the Jackon the second round.Read the thread and post the hand.http://www.bridgebase.com/forums/topic/35879-when-reporting-gibs-bugs/ Quote Link to comment Share on other sites More sharing options...
cloa513 Posted October 2, 2011 Report Share Posted October 2, 2011 Read the thread and post the hand.http://www.bridgebase.com/forums/topic/35879-when-reporting-gibs-bugs/Here is the hand Quote Link to comment Share on other sites More sharing options...
barmar Posted October 2, 2011 Report Share Posted October 2, 2011 Was this a basic or advanced robot? Quote Link to comment Share on other sites More sharing options...
cloa513 Posted October 2, 2011 Report Share Posted October 2, 2011 Was this a basic or advanced robot?Why would either robot type simulate that East would false card with KJ of diamonds? Quote Link to comment Share on other sites More sharing options...
barmar Posted October 2, 2011 Report Share Posted October 2, 2011 Not sure. But I know I've seen the robots get this right, and I only play with advanced robots. Quote Link to comment Share on other sites More sharing options...
rduran1216 Posted October 3, 2011 Report Share Posted October 3, 2011 http://tinyurl.com/3jj9aet hahahaha Quote Link to comment Share on other sites More sharing options...
barmar Posted October 5, 2011 Report Share Posted October 5, 2011 That's different. West could have ducked with Kx, trying to get an extra undertrick if declarer started with a doubleton. In general, GIB doesn't assume that just because a finesse worked the first time, it will work the next time. Of course, what the GIB declarer doesn't know is that a GIB defender will never duck like this, because it bases its defense on double dummy analysis, so it thinks declarer will play the Ace next time. But there's unlikely to be a reason in the original hand for the defender to play K from KJ, unless it needs to avoid being end-played. Quote Link to comment Share on other sites More sharing options...
cloa513 Posted October 5, 2011 Report Share Posted October 5, 2011 When GIB simulates the cards for each play, does it simulate every single card or just the suit involved? Quote Link to comment Share on other sites More sharing options...
barmar Posted October 5, 2011 Report Share Posted October 5, 2011 I'm not sure I completely understand your question, but I presume it simulates every LEGAL card to play. Quote Link to comment Share on other sites More sharing options...
Bbradley62 Posted May 1, 2014 Report Share Posted May 1, 2014 Here's another one, at matchpoints, with a basic bot:[hv=lin=pn|bbradley62,~~M9672f82,~~M8956g02,~~M57326dr|st%7C%7Cmd%7C2S78KH49D26TC68TJQ%2CS245QAH5KD3589KC4%2CS36H267TQAD47C37A%2C%7Crh%7C%7Cah%7CBoard%2016%7Csv%7Ce%7Cmb%7C1S%7Can%7CMajor%20suit%20opening%20--%205%2B%20%21S%3B%2011-21%20HCP%3B%2012-22%20total%20points%20%7Cmb%7C2H%7Can%7CTwo-level%20overcall%20--%205%2B%20%21H%3B%2010%2B%20HCP%3B%2011-18%20total%20points%20%7Cmb%7C3H%7Can%7CCue%3A%20limit%20raise%20or%20better%20--%203%2B%20%21S%3B%2011%2B%20total%20points%20%7Cmb%7Cp%7Cmb%7C4S%7Can%7C5%2B%20%21S%3B%2014-19%20total%20points%20%7Cmb%7Cp%7Cmb%7Cp%7Cmb%7Cp%7Cpc%7CHA%7Cpc%7CH8%7Cpc%7CH9%7Cpc%7CH5%7Cpc%7CH2%7Cpc%7CH3%7Cpc%7CH4%7Cpc%7CHK%7Cpc%7CC4%7Cpc%7CCA%7Cpc%7CC2%7Cpc%7CC6%7Cpc%7CC3%7Cpc%7CCK%7Cpc%7CC8%7Cpc%7CD5%7Cpc%7CSJ%7Cpc%7CS7%7Cpc%7CS4%7Cpc%7CS3%7Cpc%7CST%7Cpc%7CS8%7Cpc%7CSA%7Cpc%7CS6%7Cpc%7CS5%7Cpc%7CHT%7Cpc%7CS9%7Cpc%7CSK%7Cpc%7CCQ%7Cpc%7CSQ%7Cpc%7CC7%7Cpc%7CC9%7Cpc%7CD3%7Cpc%7CD4%7Cpc%7CDQ%7Cpc%7CD2%7Cpc%7CDJ%7Cpc%7CD6%7Cpc%7CD8%7Cpc%7CD7%7Cpc%7CDA%7Cpc%7CDT%7Cpc%7CDK%7Cpc%7CH6%7Cpc%7CC5%7Cpc%7CCT%7Cpc%7CS2%7Cpc%7CH7%7Cpc%7CD9%7Cpc%7CHQ%7Cpc%7CHJ%7Cpc%7CCJ%7C]360|270[/hv] Quote Link to comment Share on other sites More sharing options...
uday Posted May 2, 2014 Report Share Posted May 2, 2014 This one was interesting so I dug ( then scratched my head, then asked around for help ) The basic bot uses the weaker of GIB's two internal play-card engines ( bec. this engine is faster ). This engine simply deals out the enemy cards and takes the best DD action based on the form of scoring. It isn't smart about some things like this. It simply recognizes that an original Kx with north occurs more frequently than Kxx or Kxxx with south in the sample deals it uses to decide what to play for. Quote Link to comment Share on other sites More sharing options...
Bbradley62 Posted May 2, 2014 Report Share Posted May 2, 2014 retracted messy stats stuff... much ado about nothing... Thanks for your help, Uday. Just looks like basic GIB's small sample size produced a strange result. Quote Link to comment Share on other sites More sharing options...
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