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21$ 63 oddity

Posted By: David Rockwell
Date: Monday, 4 August 2014, at 12:32 p.m.

In Response To: 21$ 63 oddity (Bob Koca)

I have not solved that puzzle yet. Your idea of the gammon killing four cube is a candidate. Consider these other rollouts.





White is Player 2

score: 0
pip: 159
4 point match
pip: 167
score: 0

Blue is Player 1
XGID=-b----E-C---eE---b-d--b-B-:0:0:1:21:0:0:0:4:10
Blue to play 21

1.Rollout113/11 6/5eq: -0.2324
Player:
Opponent:
46.26% (G:12.56% B:0.92%)
53.74% (G:18.74% B:2.75%)
Conf.: 0.0047 (-0.2371...-0.2277) - [100.0%]
Duration: 4 hours 32 minutes
2.Rollout124/23 13/11eq: -0.2481 (-0.0157)
Player:
Opponent:
45.85% (G:12.38% B:0.90%)
54.15% (G:17.92% B:1.47%)
Conf.: 0.0042 (-0.2523...-0.2439) - [0.0%]
Duration: 4 hours 20 minutes
1 31104 Games rolled with Variance Reduction.
Dice Seed: 71940290
Moves and cube decisions: 3-ply

eXtreme Gammon Version: 2.10, MET: Rockwell-Kazaross





White is Player 2

score: 0
pip: 159
5 point match
pip: 167
score: 0

Blue is Player 1
XGID=-b----E-C---eE---b-d--b-B-:0:0:1:21:0:0:0:5:10
Blue to play 21

1.Rollout124/23 13/11eq: -0.2061
Player:
Opponent:
45.96% (G:12.40% B:0.63%)
54.04% (G:17.95% B:0.93%)
Conf.: 0.0030 (-0.2092...-0.2031) - [90.0%]
Duration: 3 hours 42 minutes
2.Rollout113/11 6/5eq: -0.2091 (-0.0030)
Player:
Opponent:
46.33% (G:12.58% B:0.66%)
53.67% (G:18.67% B:1.67%)
Conf.: 0.0034 (-0.2125...-0.2057) - [10.0%]
Duration: 4 hours 00 minute
1 31104 Games rolled with Variance Reduction.
Dice Seed: 8281536
Moves and cube decisions: 3-ply

eXtreme Gammon Version: 2.10, MET: Rockwell-Kazaross

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