3rh hand high

[thorvald]

[hv=pc=n&n=sqj64hq3dj83cqj86&e=s752haj2dat62ct53&d=n&v=n&b=5&a=pp1np2cp2hp2sp3hp3nppp]266|200[/hv]

 

Against 3N partner started with ♦5, and dummy played low.

 

 

I know the robots don't follow the rule of 3rd hand high, but here I was not able to find a situation, where playing the 6 could be right

 

But playing the 6 wasn't right with this layout

 

[hv=url=https://www.bridgebase.com/tools/handviewer.html?bbo=y&lin=pn%7CHuman%2CRobot%2CRobot%2CRobot%7Cst%7C%7Cmd%7C3SK8HK9854DK94CAK7%2CSAT93HT76DQ75C942%2CSQJ64HQ3DJ83CQJ86%2CS752HAJ2DAT62CT53%7Csv%7CN%7Cah%7CBoard%205%7Cmb%7CP%7Cmb%7CP%7Cmb%7C1N%7Can%7Cnotrump%20opener.%20Could%20have%205M.%20--%202-5%20%21C%3B%202-5%20%21D%3B%202-5%20%21H%3B%202-5%20%21S%3B%2015-17%20HCP%3B%2018-%20total%20points%7Cmb%7CP%7Cmb%7C2C%7Can%7CStayman%20--%2011-%20HCP%3B%2012-%20total%20points%7Cmb%7CP%7Cmb%7C2H%7Can%7C2-5%20%21C%3B%202-5%20%21D%3B%204-5%20%21H%3B%202-4%20%21S%3B%2015-17%20HCP%3B%2018-%20total%20points%7Cmb%7CP%7Cmb%7C2S%7Can%7C3-%20%21H%3B%204%20%21S%3B%209%20HCP%7Cmb%7CP%7Cmb%7C3H%7Can%7C2-5%20%21C%3B%202-5%20%21D%3B%205-%20%21H%3B%202-4%20%21S%3B%2015-17%20HCP%3B%20rebiddable%20%21H%3B%2018-%20total%20points%7Cmb%7CP%7Cmb%7C3N%7Can%7C3-%20%21H%3B%204%20%21S%3B%209%20HCP%3B%2010%2B%20total%20points%7Cmb%7CP%7Cmb%7CP%7Cmb%7CP%7Cpc%7CD5%7Cpc%7CD3%7Cpc%7CD6%7Cpc%7CD9%7Cpc%7CH4%7Cpc%7CH7%7Cpc%7CHQ%7Cpc%7CHA%7Cpc%7CHJ%7Cpc%7CHK%7Cpc%7CH6%7Cpc%7CH3%7Cpc%7CH9%7Cpc%7CHT%7Cpc%7CS4%7Cpc%7CH2%7Cpc%7CSA%7Cpc%7CS6%7Cpc%7CS2%7Cpc%7CSK%7Cpc%7CD7%7Cpc%7CD8%7Cpc%7CDA%7Cpc%7CD4%7Cpc%7CDT%7Cpc%7CDK%7Cpc%7CDQ%7Cpc%7CDJ%7Cmc%7C9%7C]399|300[/hv]

[pescetom]

If you held KQ4 it doesn't cost, but thats still no reason to risk.

[smerriman]

but here I was not able to find a situation, where playing the 6 could be right

It's not about finding situations where playing 6 was right, it's about how many situations playing 6 wasn't wrong.

 

By my calculations:

 

- a 10 deal simulation will tell GIB to play low 9.2% of the time

- a 20 deal simulation will tell GIB to play low 2.5% of the time

- a 30 deal simulation will tell GIB to play low 0.7% of the time

- a 40 deal simulation will tell GIB to play low 0.2% of the time

 

We don't know how exactly how many deals BBO has configured GIB to simulate, but according to barmar it is "a few dozen" for advanced robots, so playing low will be rare but still within the realms of possibility, even if there weren't any bugs in the intended algorithm. (And of course, with basic bots it would be considerably less rare).