Today's Double that confuses the bot

[thorvald]

This deal looks pretty normal

[hv=url=https://www.bridgebase.com/tools/handviewer.html?bbo=y&lin=pn%7Cplayer%2CRobot%2CRobot%2CRobot%7Cst%7C%7Cmd%7C1SKT94HA94D3CAK842%2CSQJ763HJT832DATC3%2CS2HQ75DQJ98542C97%2CSA85HK6DK76CQJT65%7Csv%7CE%7Cah%7CBoard%203%7Cmb%7C1C%7Can%7CMinor%20suit%20opening%20--%203%2B%20%21C%3B%2011-21%20HCP%3B%2012-22%20total%20points%7Cmb%7C1S%7Can%7COne-level%20overcall%20--%205%2B%20%21S%3B%208-17%20HCP%3B%209-19%20total%20points%7Cmb%7CP%7Cmb%7C2C%7Can%7CGood%20support%20in%20S%20--%203%2B%20%21S%3B%2010%2B%20total%20points%7Cmb%7CP%7Cmb%7C2S%7Can%7C5%2B%20%21S%3B%208%2B%20HCP%3B%209-13%20total%20points%7Cmb%7CP%7Cmb%7CP%7Cmb%7CP%7Cpc%7CC9%7Cpc%7CCQ%7Cpc%7CCK%7Cpc%7CC3%7Cpc%7CD3%7Cpc%7CDT%7Cpc%7CDJ%7Cpc%7CDK%7Cpc%7CCJ%7Cpc%7CCA%7Cpc%7CS3%7Cpc%7CC7%7Cpc%7CS6%7Cpc%7CS2%7Cpc%7CSA%7Cpc%7CS4%7Cpc%7CCT%7Cpc%7CC2%7Cpc%7CH3%7Cpc%7CD5%7Cpc%7CS5%7Cpc%7CS9%7Cpc%7CSQ%7Cpc%7CD4%7Cpc%7CH2%7Cpc%7CH5%7Cpc%7CHK%7Cpc%7CHA%7Cpc%7CH4%7Cpc%7CHT%7Cpc%7CHQ%7Cpc%7CH6%7Cpc%7CD2%7Cpc%7CD7%7Cpc%7CST%7Cpc%7CDA%7Cpc%7CSK%7Cpc%7CS7%7Cpc%7CH7%7Cpc%7CS8%7Cpc%7CC8%7Cpc%7CSJ%7Cpc%7CDQ%7Cpc%7CC5%7Cpc%7CHJ%7Cpc%7CD9%7Cpc%7CD6%7Cpc%7CH9%7Cpc%7CH8%7Cpc%7CD8%7Cpc%7CC6%7Cpc%7CC4%7C]399|300[/hv]

 

but see, what happens when I double 2♣

 

[hv=url=https://www.bridgebase.com/tools/handviewer.html?bbo=y&lin=pn%7CThorvald%2CRobot%2CRobot%2CRobot%7Cst%7C%7Cmd%7C1SKT94HA94D3CAK842%2CSQJ763HJT832DATC3%2CS2HQ75DQJ98542C97%2CSA85HK6DK76CQJT65%7Csv%7CE%7Cah%7CBoard%203%7Cmb%7C1C%7Can%7CMinor%20suit%20opening%20--%203%2B%20%21C%3B%2011-21%20HCP%3B%2012-22%20total%20points%7Cmb%7C1S%7Can%7COne-level%20overcall%20--%205%2B%20%21S%3B%208-17%20HCP%3B%209-19%20total%20points%7Cmb%7CP%7Cmb%7C2C%7Can%7CGood%20support%20in%20S%20--%203%2B%20%21S%3B%2010%2B%20total%20points%7Cmb%7CD%7Can%7C11-21%20HCP%3B%20rebiddable%20%21C%3B%20%21CKQ%3B%2012-22%20total%20points%7Cmb%7C2D%7Can%7C3%2B%20%21D%3B%205%2B%20%21S%3B%20Q%2B%20in%20%21D%3B%2012-14%20total%20points%3B%20forcing%20to%203S%7Cmb%7CP%7Cmb%7C4S%7Can%7C3%2B%20%21S%3B%2010%2B%20total%20points%7Cmb%7CD%7Can%7CTakeout%20double%20--%205-%20%21D%3B%204%2B%20%21H%3B%205-%20%21S%3B%2021-%20HCP%3B%20rebiddable%20%21C%3B%20%21CKQ%3B%2018-22%20total%20points%7Cmb%7CP%7Cmb%7CP%7Cmb%7CP%7Cpc%7CC9%7Cpc%7CCQ%7Cpc%7CCK%7Cpc%7CC3%7Cpc%7CD3%7Cpc%7CDA%7Cpc%7CD8%7Cpc%7CD6%7Cpc%7CHJ%7Cpc%7CHQ%7Cpc%7CHK%7Cpc%7CHA%7Cpc%7CH4%7Cpc%7CH8%7Cpc%7CH7%7Cpc%7CH6%7Cpc%7CH2%7Cpc%7CH5%7Cpc%7CS5%7Cpc%7CH9%7Cpc%7CSA%7Cpc%7CS4%7Cpc%7CS3%7Cpc%7CS2%7Cpc%7CS8%7Cpc%7CST%7Cpc%7CSQ%7Cpc%7CD5%7Cpc%7CS7%7Cpc%7CD4%7Cpc%7CC5%7Cpc%7CS9%7Cpc%7CSK%7Cpc%7CSJ%7Cpc%7CD9%7Cpc%7CC6%7Cpc%7CCA%7Cpc%7CS6%7Cpc%7CC7%7Cpc%7CCT%7Cpc%7CHT%7Cpc%7CD2%7Cpc%7CD7%7Cpc%7CC2%7Cpc%7CDT%7Cpc%7CDQ%7Cpc%7CDK%7Cpc%7CC4%7Cpc%7CCJ%7Cpc%7CC8%7Cpc%7CH3%7Cpc%7CDJ%7C]399|300[/hv]

 

Explanation of 2♦=3+♦, 12-14 total points, forcing to 3♠

[smerriman]

Not sure there's much to this one. 2♦ is an advanced robot bid; if its simulation of hands where you have rebiddable clubs finds that a game is worth a shot if partner has an accept of a diamond game try (it surely increases the odds, knowing your club honors are less valuable to you), then I can't argue with it. With better breaks it might have made..

[thorvald]

Not sure there's much to this one. 2♦ is an advanced robot bid; if its simulation of hands where you have rebiddable clubs finds that a game is worth a shot if partner has an accept of a diamond game try (it surely increases the odds, knowing your club honors are less valuable to you), then I can't argue with it. With better breaks it might have made..

 

I find it Ok, that West might upgrade the club-shortage, but then East should downgrade all hcp in ♣

[smerriman]

I find it Ok, that West might upgrade the club-shortage, but then East should downgrade all hcp in ♣

East's bid is based on a simulation too, so the human construct of "downgrading" is included in that.

 

From East's perspective, simulating hands where West has 12-14 points and at least a queen in diamonds, and South has those clubs, still shows game making almost every time, so it's not even close to a reject.

 

It's true that GIB can be a bit aggressive, since East's simulation doesn't take into account that West may have simulated too.. and conversely, West's simulation assumes East will only accept when it has a book-accept.. but there's really nothing you can do about that.