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BGonline.org Forums
Preliminary rollout info
Posted By: Timothy Chow In Response To: A tricky decision (Timothy Chow)
Date: Friday, 2 October 2009, at 12:07 a.m.
O.K., I confess that I set a little trap here. I was vague about what "decision" it was that I was having trouble with. The position was set up to make you think that I was trying to decide between making the outfield point and anchoring. And sure enough, that's what most people seem to have assumed. However, in reality, the "tricky decision" I was alluding to was, "Do I hit with 6/1*?"
If your reaction is, "Hit on the 1-point? What have you been smoking?" then I can only say that I agree with you. However, a 1296-game supremo rollout with gnubg puts 13/11 6/1* on top—albeit by a small margin. I'm running a 5184-game rollout now and will post the results when they're available.
This all started when I was looking at one of Robertie's 501 problems, which was the same as the position I posted except that Robertie has a Blue checker on the 20-point instead of the 22-point. GNU 2-ply put 13/11 6/1* at the top of the pile for Robertie's position. When I saw this, I thought, "What in the world...?! You can't be serious." The result was narrowly reversed when I rolled it out. Then I tried slight variations of the position. After most modifications I tried, GNU found something better than 6/1*, with the position I posted being the one exception.
Even if a longer rollout edges out 13/11 6/1* from its top spot, it's clear that GNU sees some merit in hitting that eludes me. Anybody have any clue? Do other bots concur with GNU?
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