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55 to play

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: 55 to play
Date: Sat, 9 Jul 2022 22:37:07 -0400
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by: Timothy Chow - Sun, 10 Jul 2022 02:37 UTC

XGID=-aABBBBB-A------ccbbBAbaa-:1:-1:1:55:0:0:0:0:10

X:Player 1 O:Player 2
Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| O O O | | O X X O O O | +---+
| O O O | | O X O | | 2 |
| O O | | | +---+
| | | |
| | | |
| |BAR| |
| | | |
| | | |
| | | |
| X | | X X X X |
| X X | | X X X X X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 122 O: 110 X-O: 0-0
Cube: 2, O own cube
X to play 55

---
Tim Chow

Rollout: 55 to play

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: 55 to play
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by: Timothy Chow - Tue, 12 Jul 2022 01:12 UTC

XGID=-aABBBBB-A------ccbbBAbaa-:1:-1:1:55:0:0:0:0:10

In this position, XG 3-ply plays the pedestrian 20/15 20/5, but
the rollout strongly favors the aggressive point-switching play,
which wins a lot more gammons.

1. Rollout¹ 20/15 7/2 6/1*(2) eq:+0.653
Player: 73.80% (G:31.73% B:0.19%)
Opponent: 26.20% (G:3.97% B:0.23%)
Confidence: ±0.008 (+0.645..+0.661) - [100.0%]

2. Rollout¹ 20/15 20/5 eq:+0.560 (-0.093)
Player: 74.06% (G:26.09% B:1.05%)
Opponent: 25.94% (G:10.14% B:0.53%)
Confidence: ±0.008 (+0.552..+0.568) - [0.0%]

3. Rollout¹ 20/15 20/10 9/4 eq:+0.554 (-0.099)
Player: 73.98% (G:25.71% B:1.16%)
Opponent: 26.02% (G:9.78% B:0.50%)
Confidence: ±0.008 (+0.547..+0.562) - [0.0%]

4. Rollout¹ 20/10(2) eq:+0.486 (-0.167)
Player: 71.67% (G:24.43% B:1.17%)
Opponent: 28.33% (G:10.46% B:0.28%)
Confidence: ±0.008 (+0.477..+0.494) - [0.0%]

¹ 1296 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.19.207.pre-release

---
Tim Chow

The best you get is an even break. -- Franklin Adams

interests / rec.games.backgammon / 55 to play

Subject	Author
55 to play	Timothy Chow
Rollout: 55 to play	Timothy Chow