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interests / rec.games.backgammon / Re: Which double hit?

SubjectAuthor
* Which double hit?Timothy Chow
+* Re: Which double hit?Robert Zimmerman
|`* Rollout: Which double hit?Timothy Chow
| `- Re: Rollout: Which double hit?Robert Zimmerman
`- Re: Which double hit?MK

1
Which double hit?

<u1u4hd$2p7oh$2@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Which double hit?
Date: Fri, 21 Apr 2023 09:53:48 -0400
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 by: Timothy Chow - Fri, 21 Apr 2023 13:53 UTC

XGID=-a---aE-DA--eC---b-ea---AA: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 X |
| X O | | O |
| X | | O |
| | | O |
| | X | O |
| |BAR| |
| O | | X |
| O X | | X |
| O X | | X |
| O X | | X |
| O X X | | X O O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 159 O: 160 X-O: 0-0
Cube: 1
X to play 55

---
Tim Chow

Re: Which double hit?

<c2d97a2d-ce62-4e59-9100-e157d63fe70bn@googlegroups.com>

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Newsgroups: rec.games.backgammon
Date: Fri, 21 Apr 2023 09:34:43 -0700 (PDT)
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Subject: Re: Which double hit?
From: zimbrook...@gmail.com (Robert Zimmerman)
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 by: Robert Zimmerman - Fri, 21 Apr 2023 16:34 UTC

On Friday, April 21, 2023 at 9:53:51 AM UTC-4, Timothy Chow wrote:
> XGID=-a---aE-DA--eC---b-ea---AA: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 X |
> | X O | | O |
> | X | | O |
> | | | O |
> | | X | O |
> | |BAR| |
> | O | | X |
> | O X | | X |
> | O X | | X |
> | O X | | X |
> | O X X | | X O O |
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 159 O: 160 X-O: 0-0
> Cube: 1
> X to play 55
>
> ---
> Tim Chow
It's a blitz. And things go better when you a. make points and b. excavate the front. So make the ace point. Play 20/15 with the last 5 since 13/8 strips the midpoint and stacks the 8.
Bob

Rollout: Which double hit?

<u23847$3q7ej$1@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Which double hit?
Date: Sun, 23 Apr 2023 08:25:41 -0400
Organization: A noiseless patient Spider
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 by: Timothy Chow - Sun, 23 Apr 2023 12:25 UTC

XGID=-a---aE-DA--eC---b-ea---AA: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 X |
| X O | | O |
| X | | O |
| | | O |
| | X | O |
| |BAR| |
| O | | X |
| O X | | X |
| O X | | X |
| O X | | X |
| O X X | | X O O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 159 O: 160 X-O: 0-0
Cube: 1
X to play 55

I didn't want O to anchor on my 5pt, but XG prefers unstacking the
6pt and making a new home-board point. But see the variant below
for comparison.

1. Rollout¹ Bar/20* 20/15 6/1*(2) eq:+0.723
Player: 64.31% (G:28.59% B:0.87%)
Opponent: 35.69% (G:7.72% B:0.30%)
Confidence: ±0.013 (+0.710..+0.736) - [100.0%]

2. Rollout¹ Bar/20* 13/8 6/1*(2) eq:+0.663 (-0.060)
Player: 62.31% (G:29.22% B:0.85%)
Opponent: 37.69% (G:8.29% B:0.39%)
Confidence: ±0.015 (+0.648..+0.677) - [0.0%]

3. Rollout¹ Bar/20* 20/5* eq:+0.596 (-0.127)
Player: 62.02% (G:23.61% B:1.65%)
Opponent: 37.98% (G:8.14% B:0.32%)
Confidence: ±0.016 (+0.580..+0.611) - [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---aD-DA-AeC---b-ea---AA: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 X |
| X O | | O |
| X | | O |
| | | O |
| | X | O |
| |BAR| |
| O | | |
| O X | | X |
| O X | | X |
| O X | | X |
| O X X X | | X O O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 164 O: 160 X-O: 0-0
Cube: 1
X to play 55

1. Rollout¹ Bar/20* 20/5* eq:+0.646
Player: 63.43% (G:23.43% B:1.63%)
Opponent: 36.57% (G:8.35% B:0.37%)
Confidence: ±0.011 (+0.635..+0.657) - [89.4%]

2. Rollout¹ Bar/20* 11/1* 6/1 eq:+0.636 (-0.010)
Player: 62.13% (G:27.59% B:0.86%)
Opponent: 37.87% (G:8.42% B:0.33%)
Confidence: ±0.011 (+0.625..+0.647) - [10.6%]

¹ 2592 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: Which double hit?

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Subject: Re: Rollout: Which double hit?
From: zimbrook...@gmail.com (Robert Zimmerman)
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 by: Robert Zimmerman - Mon, 24 Apr 2023 18:28 UTC

On Sunday, April 23, 2023 at 8:25:46 AM UTC-4, Timothy Chow wrote:
> XGID=-a---aE-DA--eC---b-ea---AA: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 X |
> | X O | | O |
> | X | | O |
> | | | O |
> | | X | O |
> | |BAR| |
> | O | | X |
> | O X | | X |
> | O X | | X |
> | O X | | X |
> | O X X | | X O O |
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 159 O: 160 X-O: 0-0
> Cube: 1
> X to play 55
> I didn't want O to anchor on my 5pt, but XG prefers unstacking the
> 6pt and making a new home-board point. But see the variant below
> for comparison.
>
> 1. Rollout¹ Bar/20* 20/15 6/1*(2) eq:+0.723
> Player: 64.31% (G:28.59% B:0.87%)
> Opponent: 35.69% (G:7.72% B:0.30%)
> Confidence: ±0.013 (+0.710..+0.736) - [100.0%]
>
> 2. Rollout¹ Bar/20* 13/8 6/1*(2) eq:+0.663 (-0.060)
> Player: 62.31% (G:29.22% B:0.85%)
> Opponent: 37.69% (G:8.29% B:0.39%)
> Confidence: ±0.015 (+0.648..+0.677) - [0.0%]
>
> 3. Rollout¹ Bar/20* 20/5* eq:+0.596 (-0.127)
> Player: 62.02% (G:23.61% B:1.65%)
> Opponent: 37.98% (G:8.14% B:0.32%)
> Confidence: ±0.016 (+0.580..+0.611) - [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---aD-DA-AeC---b-ea---AA: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 X |
> | X O | | O |
> | X | | O |
> | | | O |
> | | X | O |
> | |BAR| |
> | O | | |
> | O X | | X |
> | O X | | X |
> | O X | | X |
> | O X X X | | X O O |
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 164 O: 160 X-O: 0-0
> Cube: 1
> X to play 55
> 1. Rollout¹ Bar/20* 20/5* eq:+0.646
> Player: 63.43% (G:23.43% B:1.63%)
> Opponent: 36.57% (G:8.35% B:0.37%)
> Confidence: ±0.011 (+0.635..+0.657) - [89.4%]
>
> 2. Rollout¹ Bar/20* 11/1* 6/1 eq:+0.636 (-0.010)
> Player: 62.13% (G:27.59% B:0.86%)
> Opponent: 37.87% (G:8.42% B:0.33%)
> Confidence: ±0.011 (+0.625..+0.647) - [10.6%]
>
> ¹ 2592 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
I like that variant! But bear in mind that it leaves a good 6 for X when playing to hit on the 5 point.
Bob

Re: Which double hit?

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Subject: Re: Which double hit?
From: mur...@compuplus.net (MK)
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 by: MK - Fri, 5 May 2023 10:29 UTC

On April 21, 2023 at 7:53:51 AM UTC-6, Timothy Chow wrote:

> XGID=-a---aE-DA--eC---b-ea---AA:0:0:1:55:0:0:0:0:10
> X to play 55

Kind of fun. Bar/1* 6/20* 20/15 6/1

MK

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