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BGonline.org Forums
take with 2pt ancor
Posted By: aoleg1
Date: Thursday, 29 January 2009, at 12:37 p.m.
This a position from Paul Money's article. Paul says it is a close take. I rolled out twice: 1) 2-ply for both sides; 2) intermediate (0-ply with some random noise) for checker play and 2-ply for cube decision;
In both cases it is almost too good but a pass in the first and a take in the second. The difference is small but my question is: "Is it sufficient to take this against an intermediate player?
My point is that it is easy to make an error during a 2pt ancor bearoff.
MG
gnubg 120
aoleg1 106 Position ID: tm2CARjs7AYHAA Match ID: cIkIAAAAAAAA
• aoleg1 doubles
Cube decision Rollout cubeless equity +0,566 Cubeful equities: 1. Double, pass +1,000 2. Double, take +1,021 +0,021 3. No double +0,995 -0,005 Proper cube action: Double, pass Rollout details
Win W g W bg Lose L g L bg Без куба Cubeful Centered 1-cube 0,768 0,049 0,001 - 0,232 0,020 0,000 +0,566 +0,995 Standard error 0,001 0,001 0,000 - 0,001 0,000 0,000 0,002 0,004 Player gnubg owns 2-cube 0,773 0,049 0,001 - 0,227 0,019 0,000 +1,153 +1,021 Standard error 0,001 0,001 0,000 - 0,001 0,001 0,000 0,004 0,005 Full cubeful rollout with var.redn. 2592 games, Mersenne Twister dice gen. with seed 810676971 and quasi-random dice Play: супер 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]
Cube decision Rollout cubeless equity +0,557 Cubeful equities: 1. Double, take +0,995 2. Double, pass +1,000 +0,005 3. No double +0,968 -0,027 Proper cube action: Double, take Rollout details
Win W g W bg Lose L g L bg Без куба Cubeful Centered 1-cube 0,764 0,051 0,001 - 0,236 0,022 0,000 +0,557 +0,968 Standard error 0,005 0,001 0,000 - 0,005 0,001 0,000 0,011 0,029 Player gnubg owns 2-cube 0,766 0,051 0,001 - 0,234 0,020 0,000 +1,126 +0,995 Standard error 0,007 0,002 0,000 - 0,007 0,001 0,000 0,027 0,036 Full cubeful rollout with var.redn. 1296 games, Mersenne Twister dice gen. with seed 811573711 and quasi-random dice Play: 0-ply cubeful, noise 0,04 (d) [intermediate] Cube: 2-ply cubeful prune [world class]
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