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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

aoleg to play 12

gnubg120


 '2X2X2X2X2X '1X ' ' '3O

 '2X2O3O '2O3O2O ' ' '2X

aoleg1106

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
WinW gW bg LoseL gL bgБез кубаCubeful
Centered 1-cube0,7680,0490,001-0,2320,0200,000 +0,566 +0,995
Standard error0,0010,0010,000-0,0010,0000,000 0,002 0,004
Player gnubg owns 2-cube0,7730,0490,001-0,2270,0190,000 +1,153 +1,021
Standard error0,0010,0010,000-0,0010,0010,000 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
WinW gW bg LoseL gL bgБез кубаCubeful
Centered 1-cube0,7640,0510,001-0,2360,0220,000 +0,557 +0,968
Standard error0,0050,0010,000-0,0050,0010,000 0,011 0,029
Player gnubg owns 2-cube0,7660,0510,001-0,2340,0200,000 +1,126 +0,995
Standard error0,0070,0020,000-0,0070,0010,000 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]

Messages In This Thread

  • take with 2pt ancor
    aoleg1 -- Thursday, 29 January 2009, at 12:37 p.m.

 

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