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interests / rec.games.backgammon / Double 5's again

SubjectAuthor
* Double 5's againTimothy Chow
`- Rollout: Double 5's againTimothy Chow

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Double 5's again

<ur7i3e$3stjb$2@dont-email.me>

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https://www.novabbs.com/interests/article-flat.php?id=13597&group=rec.games.backgammon#13597

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Double 5's again
Date: Thu, 22 Feb 2024 08:27:09 -0500
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 by: Timothy Chow - Thu, 22 Feb 2024 13:27 UTC

XGID=-a---BDCBA--bB---cbc--bbA-:0:0:1:55:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| X O O | | O O O X |
| X O O | | O O O |
| O | | O |
| | | |
| | | |
| |BAR| |
| | | |
| | | X |
| X | | X |
| O X X | | X X |
| O X X X | | X X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 130 O: 116 X-O: 0-0
Cube: 1
X to play 55

---
Tim Chow

Rollout: Double 5's again

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Double 5's again
Date: Sat, 24 Feb 2024 22:31:03 -0500
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 by: Timothy Chow - Sun, 25 Feb 2024 03:31 UTC

XGID=-a---BDCBA--bB---cbc--bbA-:0:0:1:55:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| X O O | | O O O X |
| X O O | | O O O |
| O | | O |
| | | |
| | | |
| |BAR| |
| | | |
| | | X |
| X | | X |
| O X X | | X X |
| O X X X | | X X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 130 O: 116 X-O: 0-0
Cube: 1
X to play 55

I tried to blitz here, but XG says that's a whopper. If O had another
blot we might pick up, then blitzing would be the clear choice, but
the trouble with blitzing here is that if O manages to hop her blot
into the outfield then our advantage dissipates. Playing 13/3(2)
threatens to make a six-prime, which would be extremely strong.

1. Rollout¹ 13/3(2) eq:+0.455
Player: 60.60% (G:15.51% B:0.56%)
Opponent: 39.40% (G:7.54% B:0.22%)
Confidence: ±0.013 (+0.442..+0.467) - [100.0%]

2. Rollout¹ 8/3(2) 6/1*(2) eq:+0.337 (-0.117)
Player: 57.15% (G:17.72% B:0.23%)
Opponent: 42.85% (G:8.01% B:0.29%)
Confidence: ±0.011 (+0.326..+0.349) - [0.0%]

3. Rollout¹ 7/2(2) 6/1*(2) eq:+0.276 (-0.179)
Player: 55.31% (G:20.08% B:0.17%)
Opponent: 44.69% (G:10.71% B:0.51%)
Confidence: ±0.012 (+0.264..+0.287) - [0.0%]

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

eXtreme Gammon Version: 2.19.211.pre-release

-------
Variant
-------

XGID=-a---BDCB---bC---cbc--bbA-:0:0:1:55:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| X O O | | O O O X |
| X O O | | O O O |
| X O | | O |
| | | |
| | | |
| |BAR| |
| | | |
| | | X |
| X | | X |
| O X X | | X X |
| O X X | | X X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 134 O: 116 X-O: 0-0
Cube: 1
X to play 55

1. Rollout¹ 8/3(2) 6/1*(2) eq:+0.257
Player: 55.63% (G:15.58% B:0.19%)
Opponent: 44.37% (G:7.50% B:0.25%)
Confidence: ±0.010 (+0.247..+0.267) - [99.8%]

2. Rollout¹ 13/3(2) eq:+0.234 (-0.023)
Player: 56.45% (G:15.04% B:0.71%)
Opponent: 43.55% (G:11.13% B:0.33%)
Confidence: ±0.012 (+0.222..+0.246) - [0.2%]

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

eXtreme Gammon Version: 2.19.211.pre-release

---
Tim Chow

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