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interests / rec.games.backgammon / Anchors away 8

SubjectAuthor
* Anchors away 8Timothy Chow
`* Rollout: Anchors away 8Timothy Chow
 `- Re: Rollout: Anchors away 8Stick Rice

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Anchors away 8

<tn7f9k$2890j$3@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Anchors away 8
Date: Mon, 12 Dec 2022 09:53:40 -0500
Organization: A noiseless patient Spider
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 by: Timothy Chow - Mon, 12 Dec 2022 14:53 UTC

Final problem in this series.

XGID=--b-BbCBC------A-c-bcBBba-:0:0:1:32:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| X O | | O O X X O O |
| O | | O O X X O |
| O | | O |
| | | |
| | | |
| |BAR| |
| | | |
| | | |
| X | | X |
| X X | | X O X O |
| X X | | X O X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 165 O: 142 X-O: 0-0
Cube: 1
X to play 32

---
Tim Chow

Rollout: Anchors away 8

<tnckh0$2q631$2@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Anchors away 8
Date: Wed, 14 Dec 2022 08:53:37 -0500
Organization: A noiseless patient Spider
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 by: Timothy Chow - Wed, 14 Dec 2022 13:53 UTC

XGID=--b-BbCBC------A-c-bcBBba-:0:0:1:32:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| X O | | O O X X O O |
| O | | O O X X O |
| O | | O |
| | | |
| | | |
| |BAR| |
| | | |
| | | |
| X | | X |
| X X | | X O X O |
| X X | | X O X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 165 O: 142 X-O: 0-0
Cube: 1
X to play 32

Even when you have two anchors, breaking one of them can expose you to
an attack. But here, O has four checkers back herself, two of which
aren't so easy to escape, and her own board is not so strong. XG says
that X should take the opportunity to play 21/16, which increases X's
flexibility and outfield control.

1. Rollout¹ 21/16 eq:+0.319
Player: 58.87% (G:16.93% B:0.95%)
Opponent: 41.13% (G:15.99% B:0.53%)
Confidence: ±0.019 (+0.300..+0.338) - [100.0%]

2. Rollout¹ 21/18 15/13 eq:+0.238 (-0.082)
Player: 57.20% (G:16.29% B:0.95%)
Opponent: 42.80% (G:17.81% B:0.57%)
Confidence: ±0.022 (+0.216..+0.260) - [0.0%]

3. Rollout¹ 15/12 8/6 eq:+0.227 (-0.092)
Player: 56.77% (G:15.32% B:0.83%)
Opponent: 43.23% (G:14.53% B:0.33%)
Confidence: ±0.015 (+0.212..+0.242) - [0.0%]

4. Rollout¹ 8/3 eq:+0.218 (-0.101)
Player: 57.11% (G:16.03% B:0.83%)
Opponent: 42.89% (G:16.94% B:0.58%)
Confidence: ±0.017 (+0.201..+0.235) - [0.0%]

5. Rollout¹ 15/12 6/4 eq:+0.209 (-0.110)
Player: 56.09% (G:15.09% B:0.81%)
Opponent: 43.91% (G:14.79% B:0.38%)
Confidence: ±0.015 (+0.194..+0.224) - [0.0%]

6. Rollout¹ 15/10 eq:+0.190 (-0.129)
Player: 55.87% (G:14.86% B:0.74%)
Opponent: 44.13% (G:15.38% B:0.39%)
Confidence: ±0.015 (+0.175..+0.206) - [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

---
Tim Chow

Re: Rollout: Anchors away 8

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Subject: Re: Rollout: Anchors away 8
From: bananabo...@gmail.com (Stick Rice)
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 by: Stick Rice - Wed, 14 Dec 2022 19:46 UTC

On Wednesday, December 14, 2022 at 8:53:38 AM UTC-5, Tim Chow wrote:
> XGID=--b-BbCBC------A-c-bcBBba-:0:0:1:32:0:0:0:0:10
>
> Score is X:0 O:0. Unlimited Game
> +13-14-15-16-17-18------19-20-21-22-23-24-+
> | X O | | O O X X O O |
> | O | | O O X X O |
> | O | | O |
> | | | |
> | | | |
> | |BAR| |
> | | | |
> | | | |
> | X | | X |
> | X X | | X O X O |
> | X X | | X O X O |
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 165 O: 142 X-O: 0-0
> Cube: 1
> X to play 32
> Even when you have two anchors, breaking one of them can expose you to
> an attack. But here, O has four checkers back herself, two of which
> aren't so easy to escape, and her own board is not so strong. XG says
> that X should take the opportunity to play 21/16, which increases X's
> flexibility and outfield control.
>
> 1. Rollout¹ 21/16 eq:+0.319
> Player: 58.87% (G:16.93% B:0.95%)
> Opponent: 41.13% (G:15.99% B:0.53%)
> Confidence: ±0.019 (+0.300..+0.338) - [100.0%]
>
> 2. Rollout¹ 21/18 15/13 eq:+0.238 (-0.082)
> Player: 57.20% (G:16.29% B:0.95%)
> Opponent: 42.80% (G:17.81% B:0.57%)
> Confidence: ±0.022 (+0.216..+0.260) - [0.0%]
>
> 3. Rollout¹ 15/12 8/6 eq:+0.227 (-0.092)
> Player: 56.77% (G:15.32% B:0.83%)
> Opponent: 43.23% (G:14.53% B:0.33%)
> Confidence: ±0.015 (+0.212..+0.242) - [0.0%]
>
> 4. Rollout¹ 8/3 eq:+0.218 (-0.101)
> Player: 57.11% (G:16.03% B:0.83%)
> Opponent: 42.89% (G:16.94% B:0.58%)
> Confidence: ±0.017 (+0.201..+0.235) - [0.0%]
>
> 5. Rollout¹ 15/12 6/4 eq:+0.209 (-0.110)
> Player: 56.09% (G:15.09% B:0.81%)
> Opponent: 43.91% (G:14.79% B:0.38%)
> Confidence: ±0.015 (+0.194..+0.224) - [0.0%]
>
> 6. Rollout¹ 15/10 eq:+0.190 (-0.129)
> Player: 55.87% (G:14.86% B:0.74%)
> Opponent: 44.13% (G:15.38% B:0.39%)
> Confidence: ±0.015 (+0.175..+0.206) - [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
>
> ---
> Tim Chow

It's only right to run because of the opp's blotted ace point. Bring that checker back into play remaining in the zone and it won't be.

Stick

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