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Variant positions: Run or prime?
Posted By: Timothy Chow In Response To: Run or prime? (Timothy Chow)
Date: Thursday, 20 May 2010, at 1:34 a.m.
I rolled out two variant positions. It seems that there are some fairly delicate tradeoffs going on despite the sizable shifts in equity. In the first position below, running leaves 15 shots and priming leaves 17 shots but priming is still slightly better; however, best of all is lifting, which leaves 15 shots but only one blot.
In the second position below, running leaves 13 shots and "priming" leaves 15 shots; I put "priming" in quotes because the new point that is made does not really help form a six-prime. Running significantly beats priming here, and lifting, which leaves 15 shots and one blot, is a whopper.
First position:
gnubg 127
tchow 122 Position ID: bPeAATCcbRkDEA Match ID: cAkZAAAAEAAA
# Ply Move Equity • 1 R 23/17 8/6 +0.500
0.647 0.137 0.007 - 0.353 0.122 0.004 +0.313 +0.500 0.001 0.001 0.000 - 0.001 0.001 0.000 0.003 0.008 Full cubeful rollout with var.redn. 1296 games, Mersenne Twister dice gen. with seed 852719734 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 23/17 10/8 +0.469 ( -0.031)
0.649 0.131 0.007 - 0.351 0.130 0.004 +0.302 +0.469 0.001 0.001 0.000 - 0.001 0.001 0.000 0.003 0.008 Full cubeful rollout with var.redn. 1296 games, Mersenne Twister dice gen. with seed 852719734 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 23/15 +0.431 ( -0.069)
0.637 0.123 0.006 - 0.363 0.153 0.006 +0.245 +0.431 0.001 0.001 0.000 - 0.001 0.001 0.000 0.003 0.007 Full cubeful rollout with var.redn. 1296 games, Mersenne Twister dice gen. with seed 852719734 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]
Second position:
gnubg 127
tchow 125 Position ID: bPeAATCcbTIDEA Match ID: cAkZAAAAEAAA
# Ply Move Equity • 1 R 23/15 +0.459
0.632 0.108 0.005 - 0.368 0.139 0.004 +0.235 +0.459 0.001 0.001 0.000 - 0.001 0.001 0.000 0.003 0.008 Full cubeful rollout with var.redn. 1296 games, Mersenne Twister dice gen. with seed 853043987 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 23/17 11/9 +0.392 ( -0.067)
0.623 0.116 0.006 - 0.377 0.138 0.004 +0.226 +0.392 0.001 0.001 0.000 - 0.001 0.001 0.000 0.003 0.010 Full cubeful rollout with var.redn. 1296 games, Mersenne Twister dice gen. with seed 853043987 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 23/17 9/7 +0.307 ( -0.152)
0.602 0.109 0.005 - 0.398 0.144 0.004 +0.171 +0.307 0.001 0.001 0.000 - 0.001 0.002 0.000 0.003 0.008 Full cubeful rollout with var.redn. 1296 games, Mersenne Twister dice gen. with seed 853043987 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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