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Bot Battle #6 Rollout

Posted By: Jason Lee
Date: Wednesday, 20 March 2024, at 11:21 p.m.

In Response To: Bot Battle #6 (Jason Lee)





White is Player 2

score: 0
pip: 146
9 point match
pip: 122
score: 3

Blue is Player 1
XGID=-a-BCBB-A---aBa--cbcbb--C-:1:-1:-1:00:0:3:0:9:10
Blue on roll, cube action?

Analyzed in Rollout No redouble Redouble/Take
Player Winning Chances: 79.73% (G:30.75% B:4.54%) 79.23% (G:31.64% B:9.09%)
Opponent Winning Chances: 20.27% (G:3.55% B:0.19%) 20.77% (G:3.77% B:0.28%)
Cubeless Equities +0.902 +1.314
Cubeful Equities
No redouble:+0.963±0.008 (+0.955..+0.971)
Redouble/Take:+0.943 (-0.020)±0.014 (+0.929..+0.957)
xg Redouble/Pass:+1.000 (+0.037)
Best Cube action: No redouble / Take
Percentage of wrong pass needed to make the double decision right: 35.1%
Rollout details
1296 Games rolled with Variance Reduction.
Dice Seed: 80411969
First 6 moves and cube decisions: XG Roller++
Remaining moves and cube decisions: 4-ply
Double Decision confidence:99.2%
Take Decision confidence:100.0%
Duration: 17 hours 02 minutes

eXtreme Gammon Version: 2.19.211.pre-release, MET: Kazaross XG2

Like Bob, Chuck and I thought this was a play on, and we were (a) surprised to get cubed and (b) more surprised it's a take.

There are fundamental limits to what I am capable of getting right in backgammon, and this is beyond those limits. Yes, yes, match score, some counterpriming going on... doesn't matter. I will never get this one right. Give me the same position in a month, and I will get it wrong again.

JLee

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