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Advanced Backgammon #192 and #193 -- Rollouts

Posted By: Igor
Date: Wednesday, 25 June 2014, at 1:03 p.m.

In Response To: Advanced Backgammon #192 and #193 (Igor)

Robertie advocates the kamikaze play in 192 and quiet 8/3 in 193 since in the latter position blue might find it difficult recirculating checkers due to the 5-prime by white. However, XG seems to like kamikaze play in both positions. I won't try to explain why since in #185 it was all about safe play (as opposed to #193) and I have absolutely no idea how to differentiate those two.





White is Player 2

score: 0
pip: 112
Unlimited Game
Jacoby Beaver
pip: 177
score: 0

Blue is Player 1
XGID=---Aa-DBC----a---cccbBbBA-:1:1:1:41:0:0:3:0:10
Blue to play 41

1.Rollout18/4* 6/5eq: -0.378
Player:
Opponent:		39.24% (G:4.93% B:0.22%)
60.76% (G:35.96% B:2.86%)		Conf.: ± 0.009 (-0.387...-0.368) - [100.0%]
Duration: 52 minutes 46 seconds
2.Rollout17/3 6/5eq: -0.444 (-0.067)
Player:
Opponent:		35.16% (G:4.10% B:0.17%)
64.84% (G:31.99% B:1.93%)		Conf.: ± 0.008 (-0.452...-0.436) - [0.0%]
Duration: 36 minutes 37 seconds
3.Rollout18/4* 4/3eq: -0.452 (-0.074)
Player:
Opponent:		33.02% (G:4.41% B:0.17%)
66.98% (G:27.81% B:1.54%)		Conf.: ± 0.008 (-0.459...-0.444) - [0.0%]
Duration: 37 minutes 27 seconds
4.Rollout28/3eq: -0.476 (-0.098)
Player:
Opponent:		32.07% (G:3.72% B:0.13%)
67.93% (G:27.08% B:1.30%)		Conf.: ± 0.007 (-0.483...-0.469) - [0.0%]
Duration: 30 minutes 26 seconds
1 1296 Games rolled with Variance Reduction.
Dice Seed: 84735248
Moves: 4-ply, cube decisions: XG Roller+

2 1296 Games rolled with Variance Reduction.
Dice Seed: 12415642
Moves: 4-ply, cube decisions: XG Roller+

eXtreme Gammon Version: 2.10
White is Player 2

score: 0
pip: 134
Unlimited Game
Jacoby Beaver
pip: 179
score: 0

Blue is Player 1
XGID=---Aa-DBC-a-ba---bbbbbBBA-:1:1:1:41:0:0:3:0:10
Blue to play 41

1.Rollout18/4* 6/5eq: -0.903
Player:
Opponent:		21.85% (G:1.93% B:0.09%)
78.15% (G:41.81% B:3.47%)		Conf.: ± 0.010 (-0.913...-0.894) - [100.0%]
Duration: 50 minutes 34 seconds
2.Rollout17/3 6/5eq: -0.931 (-0.028)
Player:
Opponent:		18.62% (G:1.94% B:0.10%)
81.38% (G:37.48% B:2.41%)		Conf.: ± 0.008 (-0.939...-0.924) - [0.0%]
Duration: 38 minutes 37 seconds
3.Rollout18/3eq: -0.938 (-0.035)
Player:
Opponent:		17.43% (G:1.79% B:0.08%)
82.57% (G:35.32% B:2.00%)		Conf.: ± 0.007 (-0.945...-0.931) - [0.0%]
Duration: 35 minutes 35 seconds
4.Rollout17/6 7/3eq: -0.954 (-0.051)
Player:
Opponent:		16.94% (G:1.64% B:0.08%)
83.06% (G:36.02% B:2.04%)		Conf.: ± 0.007 (-0.961...-0.947) - [0.0%]
Duration: 36 minutes 05 seconds
5.Rollout18/4* 4/3eq: -0.963 (-0.060)
Player:
Opponent:		17.19% (G:2.10% B:0.11%)
82.81% (G:37.32% B:2.41%)		Conf.: ± 0.007 (-0.971...-0.956) - [0.0%]
Duration: 40 minutes 53 seconds
1 1296 Games rolled with Variance Reduction.
Dice Seed: 84735248
Moves: 4-ply, cube decisions: XG Roller+

eXtreme Gammon Version: 2.10

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