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52S-41D-31P-65R-42

Posted By: Timothy Chow
Date: Sunday, 26 May 2019, at 12:54 p.m.

In Response To: 52S-41D-31P-65R-42 (Timothy Chow)

I encountered the position below recently (May 14, 2019) and was going to post it here as a problem, but then I discovered that I had already posted it here back in 2015 (my records indicate that I encountered it on September 3, 2015). Evidently, I didn't learn anything, because I anchored both times.

This is first time I've detected encountering the same fifth-roll position in two different games of mine. Admittedly, the score was different in the two cases, and in one case the move order was 31P-65R-52S-41D while in the other case the move order was 52S-41D-31P-65R.

I'm a little surprised that the rollout results differ slightly; presumably it's because of the slightly different versions of XG.





White is Player 2

score: 0
pip: 151
Unlimited Game
pip: 156
score: 0

Blue is Player 1
XGID=-a---BD-C---eD---d-e--A-A-:0:0:1:42:0:0:0:0:10
Blue to play 42

1.Rollout18/4 6/4eq: +0.357
Player:
Opponent:		57.34% (G:19.70% B:0.55%)
42.66% (G:9.03% B:0.36%)		Conf.: ± 0.008 (+0.349...+0.364) - [100.0%]
Duration: 26 minutes 17 seconds
2.Rollout124/20 22/20eq: +0.328 (-0.029)
Player:
Opponent:		56.81% (G:13.78% B:0.30%)
43.19% (G:4.72% B:0.16%)		Conf.: ± 0.006 (+0.322...+0.334) - [0.0%]
Duration: 29 minutes 07 seconds
1 5184 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.19.207.pre-release

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