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Rollout - but I don't think this is the end of the story

Posted By: Timothy Chow
Date: Friday, 28 May 2010, at 1:41 a.m.

In Response To: One of the stranger positions I've faced lately (Timothy Chow)

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.

gnubg183


 ' '2X2X '3X3O ' '1X1X '

1X1X1X1X2X5O '2O ' '2O2O

tchow171

Position ID: bA4FsCrgMzZwQA Match ID: cIkGAFAACAAA

# Ply Move Equity
1 R bar/24 6/1* +0.085
0.5300.1490.006-0.4700.1480.008 +0.058 +0.085
0.0020.0020.001-0.0020.0020.001 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)
0.5230.1280.006-0.4770.1590.009 +0.012 +0.028
0.0020.0020.000-0.0020.0020.001 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)
0.5010.1330.007-0.4990.1800.006 -0.044 -0.038
0.0020.0020.000-0.0020.0020.001 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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