Stephen Tu Posted July 3, 2012 Report Share Posted July 3, 2012 GIB to me passes way too aggressively on takeout doubles of opening preempts and preemptive overcalls, letting opps doubled into game w/ overtricks rather than taking a smaller minus by bidding on. I'm often on the receiving end of this largesse but this time was for the bad guys. [hv=sn=stephtu&s=SAHAT54DQ87CAKQ32&wn=Robot&w=SQT985432HK8DKJC8&nn=Robot&n=SK6HJ9732DT92CJT4&en=Robot&e=SJ7HQ6DA6543C9765&d=s&v=o&b=27&a=1C(Minor suit opening -- 3+ C%3B 11-21 HCP%3B 1)3S(Aggressive weak jump overcall -- 6+ S%3B 10- HCP%3B 3+ total points)PPD(Takeout double -- 3+ C%3B 21- HCP%3B 16-22 t)PPP&p=DTD3DQDKS8SKS7SACKC8C4C9CAS9CJC5DJD2D4D7S2S6SJH4DAD8H8D9D6C2HKH2H6HASQH9STH7C6H5S4H3D5HTS5CTC7C3S3HJHQCQ]400|300[/hv] Why pass with one only trump trick, and a reasonable suit to bid? Is it the default to bid after these takeout doubles and being overridden by sim? Shouldn't the takeout double show more than just "3+ clubs", and also show 3+ H, 3+D, and 2- spades? Maybe for sim purposes it should assume 1- spade? Quote Link to comment Share on other sites More sharing options...
jamegumb Posted July 3, 2012 Report Share Posted July 3, 2012 This is a frequent complaint. My main question regarding GIB's simulations: Does the bot base its decision on which outcome is more frequently correct? Or based on the expected outcome of each outcome? That is, let's say the bot simulates this 100 times, of which 60 times 3S and 4H go off 1, and 40 times 3S and 4H make. It's right in this case to pass 60% of the time, but it's such a spectacularly wrong decision when incorrect that you'd still want the bot to pull the double. Quote Link to comment Share on other sites More sharing options...
Stephen Tu Posted July 3, 2012 Author Report Share Posted July 3, 2012 Does the bot base its decision on which outcome is more frequently correct? Or based on the expected outcome of each outcome? That is, let's say the bot simulates this 100 times, of which 60 times 3S and 4H go off 1, and 40 times 3S and 4H make. It's right in this case to pass 60% of the time, but it's such a spectacularly wrong decision when incorrect that you'd still want the bot to pull the double. You'd want to weigh by expected outcome at IMPs/total points but by frequency if it's matchpoints. GIB does factor in form of scoring so I'm pretty sure it gets that right. I think it's passes too often probably because it has bad inputs into the simulated hands, not having representative sample of what doubler has and what preemptor has (here it says 3s only promises 6+ spades; shouldn't it expect 7+ spades?). Either that or maybe bad definitions of the continuations? Quote Link to comment Share on other sites More sharing options...
Bbradley62 Posted August 10, 2012 Report Share Posted August 10, 2012 Another example. IMPs, btw.[hv=lin=pn|bbradley62,~~M29958,~~M29956,~~M29957|st%7C%7Cmd%7C2S5KAH4TQAD47QKC36%2CS67TH27KD9C4579KA%2CS234H568D2368C2TQ%2C%7Crh%7C%7Cah%7CBoard%208%7Csv%7Co%7Cmb%7Cp%7Cmb%7Cp%7Cmb%7Cp%7Cmb%7C1D%7Can%7CMinor%20suit%20opening%20--%203%2B%20D%3B%2011-21%20HCP%3B%201%7Cmb%7C2C%7Can%7CTwo-level%20overcall%20--%205%2B%20C%3B%2010-11%20HCP%3B%2011-12%20total%20points%20%7Cmb%7Cp%7Cmb%7Cp%7Cmb%7Cd%7Can%7C2-%20C%3B%204-7%20D%3B%203%2B%20H%3B%203%2B%20S%3B%2011-21%20HCP%3B%2012-2%7Cmb%7Cp%7Cmb%7Cp%7Cmb%7Cp%7Cpc%7C]360|270[/hv]I'm amused that I can have 7, but not 8, diamonds with the re-opening double. Quote Link to comment Share on other sites More sharing options...
Quantumcat Posted August 11, 2012 Report Share Posted August 11, 2012 If you have the minimum number of the other suits, 7 is the maximum number of diamonds (0♣ + 3♥ + 3♠ + 7♦ = 13 cards). Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.