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interests / rec.games.backgammon / Rollout: Anchor or not?

SubjectAuthor
* Anchor or not?Timothy Chow
`* Rollout: Anchor or not?Timothy Chow
 `* Re: Rollout: Anchor or not?Stick Rice
  `- Re: Rollout: Anchor or not?Timothy Chow

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Anchor or not?

<t3h40p$3ss$2@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Anchor or not?
Date: Sun, 17 Apr 2022 09:17:12 -0400
Organization: A noiseless patient Spider
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 by: Timothy Chow - Sun, 17 Apr 2022 13:17 UTC

XGID=-a--B-BBBAB-bB--dc-c-b-A-A:0:0:1:52:0:0:0:0:10

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-+
| X O O | | O O X |
| X O O | | O O |
| O O | | O |
| O | | |
| | X | |
| |BAR| |
| | | |
| | | |
| | | |
| O X X X | | X X |
| O X X X X | | X X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 153 O: 136 X-O: 0-0
Cube: 1
X to play 52

---
Tim Chow

Rollout: Anchor or not?

<t3ma0i$81e$1@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Anchor or not?
Date: Tue, 19 Apr 2022 08:30:09 -0400
Organization: A noiseless patient Spider
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 by: Timothy Chow - Tue, 19 Apr 2022 12:30 UTC

XGID=-a--B-BBBAB-bB--dc-c-b-A-A:0:0:1:52:0:0:0:0:10

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-+
| X O O | | O O X |
| X O O | | O O |
| O O | | O |
| O | | |
| | X | |
| |BAR| |
| | | |
| | | |
| | | |
| O X X X | | X X |
| O X X X X | | X X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 153 O: 136 X-O: 0-0
Cube: 1
X to play 52

The subject line is slightly devious because the real conundrum for
most players is whether to slot the 5pt. Yes, says XG. But I did
not consider slotting OTB.

1. Rollout¹ Bar/23 10/5 eq:-0.157
Player: 47.60% (G:11.35% B:0.43%)
Opponent: 52.40% (G:17.50% B:1.14%)
Confidence: ±0.015 (-0.172..-0.142) - [100.0%]

2. Rollout¹ Bar/23 13/8 eq:-0.233 (-0.076)
Player: 44.69% (G:10.80% B:0.38%)
Opponent: 55.31% (G:15.65% B:0.90%)
Confidence: ±0.015 (-0.248..-0.217) - [0.0%]

3. Rollout¹ Bar/18 eq:-0.238 (-0.081)
Player: 46.14% (G:10.48% B:0.47%)
Opponent: 53.86% (G:20.83% B:1.11%)
Confidence: ±0.015 (-0.254..-0.223) - [0.0%]

4. Rollout¹ Bar/20 9/7 eq:-0.258 (-0.101)
Player: 44.80% (G:10.89% B:0.49%)
Opponent: 55.20% (G:18.58% B:0.77%)
Confidence: ±0.016 (-0.274..-0.242) - [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

Re: Rollout: Anchor or not?

<5cb01363-6516-4a9a-bd5c-c093b9e6fff7n@googlegroups.com>

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Subject: Re: Rollout: Anchor or not?
From: bananabo...@gmail.com (Stick Rice)
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 by: Stick Rice - Wed, 20 Apr 2022 20:36 UTC

On Tuesday, April 19, 2022 at 8:30:12 AM UTC-4, Tim Chow wrote:
> XGID=-a--B-BBBAB-bB--dc-c-b-A-A:0:0:1:52:0:0:0:0:10
>
> 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-+
> | X O O | | O O X |
> | X O O | | O O |
> | O O | | O |
> | O | | |
> | | X | |
> | |BAR| |
> | | | |
> | | | |
> | | | |
> | O X X X | | X X |
> | O X X X X | | X X O |
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 153 O: 136 X-O: 0-0
> Cube: 1
> X to play 52
> The subject line is slightly devious because the real conundrum for
> most players is whether to slot the 5pt. Yes, says XG. But I did
> not consider slotting OTB.
>
> 1. Rollout¹ Bar/23 10/5 eq:-0.157
> Player: 47.60% (G:11.35% B:0.43%)
> Opponent: 52.40% (G:17.50% B:1.14%)
> Confidence: ±0.015 (-0.172..-0.142) - [100.0%]
>
> 2. Rollout¹ Bar/23 13/8 eq:-0.233 (-0.076)
> Player: 44.69% (G:10.80% B:0.38%)
> Opponent: 55.31% (G:15.65% B:0.90%)
> Confidence: ±0.015 (-0.248..-0.217) - [0.0%]
>
> 3. Rollout¹ Bar/18 eq:-0.238 (-0.081)
> Player: 46.14% (G:10.48% B:0.47%)
> Opponent: 53.86% (G:20.83% B:1.11%)
> Confidence: ±0.015 (-0.254..-0.223) - [0.0%]
>
> 4. Rollout¹ Bar/20 9/7 eq:-0.258 (-0.101)
> Player: 44.80% (G:10.89% B:0.49%)
> Opponent: 55.20% (G:18.58% B:0.77%)
> Confidence: ±0.016 (-0.274..-0.242) - [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

How did you not consider slotting? I mean that seriously, not sarcastically. After looking for two seconds I saw the two was *forced so I played bar/23. After that there are not a lot of reasonable fives to consider. Have to look at them all.

Stick

Re: Rollout: Anchor or not?

<t3rl8e$4v9$1@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Re: Rollout: Anchor or not?
Date: Thu, 21 Apr 2022 09:12:44 -0400
Organization: A noiseless patient Spider
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 by: Timothy Chow - Thu, 21 Apr 2022 13:12 UTC

On 4/20/2022 4:36 PM, Stick Rice wrote:

> How did you not consider slotting?

https://www.youtube.com/watch?v=uYOES3zZDu0&t=590s

---
Tim Chow

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