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BGonline.org Forums
Rollout - but I don't think this is the end of the story
Posted By: Timothy Chow In Response To: One of the stranger positions I've faced lately (Timothy Chow)
Date: Friday, 28 May 2010, at 1:41 a.m.
Clearly, I'm not the only one who finds this position interesting and difficult! OTB I played bar/24 18/13. The rollout below prefers hitting loose on the 1-point, which has certain merits as various people have suggested. For me, however, a rollout of a given position is only a starting point, not the ending point. Until I find a theory I like, and am able to test that theory by varying the position and seeing if the theory's predictions match rollout results (or predict that the bot will misplay the game in a certain way), I don't consider myself to have any understanding of the position. I will have to mull over everyone's thoughts and see what I can come up with.
gnubg 183
tchow 171 Position ID: bA4FsCrgMzZwQA Match ID: cIkGAFAACAAA
# Ply Move Equity • 1 R bar/24 6/1* +0.085
0.530 0.149 0.006 - 0.470 0.148 0.008 +0.058 +0.085 0.002 0.002 0.001 - 0.002 0.002 0.001 0.006 0.015 Full cubeful rollout with var.redn. 1296 games, Mersenne Twister dice gen. with seed 853206789 and quasi-random dice Play: supremo 2-ply cubeful prune [world class] keep the first 0 0-ply moves and up to 16 more moves within equity 0.32 Skip pruning for 1-ply moves. Cube: 2-ply cubeful prune [world class] 2 R bar/24 18/13 +0.028 ( -0.057)
0.523 0.128 0.006 - 0.477 0.159 0.009 +0.012 +0.028 0.002 0.002 0.000 - 0.002 0.002 0.001 0.006 0.015 Full cubeful rollout with var.redn. 1296 games, Mersenne Twister dice gen. with seed 853206789 and quasi-random dice Play: supremo 2-ply cubeful prune [world class] keep the first 0 0-ply moves and up to 16 more moves within equity 0.32 Skip pruning for 1-ply moves. Cube: 2-ply cubeful prune [world class] 3 R bar/20 12/11 -0.038 ( -0.123)
0.501 0.133 0.007 - 0.499 0.180 0.006 -0.044 -0.038 0.002 0.002 0.000 - 0.002 0.002 0.001 0.007 0.016 Full cubeful rollout with var.redn. 1296 games, Mersenne Twister dice gen. with seed 853206789 and quasi-random dice Play: supremo 2-ply cubeful prune [world class] keep the first 0 0-ply moves and up to 16 more moves within equity 0.32 Skip pruning for 1-ply moves. Cube: 2-ply cubeful prune [world class]
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