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BGonline.org Forums
A tricky one or ... Rollout
Posted By: pierrez In Response To: A tricky one or ... (Bob Koca)
Date: Monday, 25 August 2025, at 2:50 p.m.
All respondents selected 13/7 8/4 but
White is Joueur 2
score: 0
pip: 92Unlimited Game
Jacoby Beaverpip: 111
score: 0
Blue is Joueur 1XGID=-BB-ACB-A---bB--bb-bBcaba-:0:0:1:64:0:0:3:0:10 Blue to play 64
1. Rollout1 13/7 8/4 eq: -0,544
Player:
Opponent:34,03% (G:3,66% B:0,11%)
65,97% (G:3,16% B:0,05%)Conf.: ± 0,008 (-0,552...-0,536) - [53,6%]
Duration: 9 minutes 51 seconds2. Rollout1 20/14 8/4 eq: -0,545 (-0,001)
Player:
Opponent:33,47% (G:4,43% B:0,09%)
66,53% (G:5,92% B:0,06%)Conf.: ± 0,008 (-0,553...-0,537) - [45,1%]
Duration: 8 minutes 57 seconds3. Rollout1 20/10 eq: -0,556 (-0,011)
Player:
Opponent:32,97% (G:5,22% B:0,10%)
67,03% (G:7,83% B:0,14%)Conf.: ± 0,010 (-0,565...-0,546) - [1,2%]
Duration: 6 minutes 55 seconds4. Rollout1 13/3 eq: -0,578 (-0,034)
Player:
Opponent:32,92% (G:5,93% B:0,28%)
67,08% (G:5,63% B:0,27%)Conf.: ± 0,008 (-0,586...-0,570) - [0,0%]
Duration: 7 minutes 39 seconds5. 4-ply 13/9 13/7 eq: -0,567 (-0,023)
Player:
Opponent:31,66% (G:2,01% B:0,02%)
68,34% (G:2,85% B:0,23%)1 1296 Games rolled with Variance Reduction.
Moves: 3-ply, cube decisions: XG RollereXtreme Gammon Version: 2.19.211.pre-release
XG put on an equal step 20/14 8/4 despite Blue is down in the race. So what is the hidden asset of this play ?
Improving Blue board with the 4 is clear. And because of this liability (2 blots) in the White homeboard, then one can assume that the battle will revolve on leaving the respective 13 point. So as long as Blue maintain his own 13 point, White, barring perfect rolls, will bury her checkers deep in her homeboard. Hence increasing her wastage and EPC compared to Blue's EPC.
The trade is : with 13/7 8/4, the remaining blot on the 13 point is safe for one turn, then Blue as to rely on an indirect shot from his anchor when with 20/14 8/4, Blue will keep the 13 point longer and threaten a direct shot.
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