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interests / rec.games.backgammon / Re: Rollout: Hit or step up?

Hit or step up?

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Hit or step up?
Date: Sun, 27 Feb 2022 09:48:53 -0500
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by: Timothy Chow - Sun, 27 Feb 2022 14:48 UTC

XGID=--AC-CCbB---aBa--bbcbb-A--:1:1:1:41:0:0:0:0:10

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 O O X |
| X O O | | O O O |
| | | O |
| | | |
| | | |
| |BAR| |
| | | |
| | | |
| | | X X X | +---+
| X O | | X X X | | 2 |
| O X O | | X X X X | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 109 O: 126 X-O: 0-0
Cube: 2, X own cube
X to play 41

---
Tim Chow

Rollout: Hit or step up?

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Hit or step up?
Date: Tue, 1 Mar 2022 08:37:12 -0500
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by: Timothy Chow - Tue, 1 Mar 2022 13:37 UTC

XGID=--AC-CCbB---aBa--bbcbb-A--:1:1:1:41:0:0:0:0:10

I wanted to post this now, but am in a bit of a hurry so I won't post
any commentary right now. Maybe later.

1. Rollout¹ 13/12* 6/2 eq:-0.322
Player: 31.09% (G:13.99% B:0.28%)
Opponent: 68.91% (G:15.89% B:0.94%)
Confidence: ±0.009 (-0.331..-0.313) - [100.0%]

2. Rollout¹ 23/22 6/2 eq:-0.402 (-0.080)
Player: 28.62% (G:9.23% B:0.22%)
Opponent: 71.38% (G:15.71% B:0.57%)
Confidence: ±0.008 (-0.409..-0.394) - [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: Hit or step up?

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Re: Rollout: Hit or step up?
Date: Tue, 1 Mar 2022 22:01:57 -0500
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by: Timothy Chow - Wed, 2 Mar 2022 03:01 UTC

I don't have too many comments about this position, but here is a
variant in which O's return shots are more potent than in the original
position.

XGID=--AC-CCcB---aB---bbcbb-A--:1:1:1:41:0:0:0:0:10

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 O X |
| X O O | | O O O |
| | | O |
| | | |
| | | |
| |BAR| |
| | | |
| | | |
| O | | X X X | +---+
| X O | | X X X | | 2 |
| O X O | | X X X X | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 109 O: 133 X-O: 0-0
Cube: 2, X own cube
X to play 41

1. Rollout¹ 23/22 6/2 eq:-0.234
Player: 34.45% (G:11.15% B:0.19%)
Opponent: 65.55% (G:14.18% B:0.50%)
Confidence: ±0.008 (-0.243..-0.226) - [100.0%]

2. Rollout¹ 13/12* 6/2 eq:-0.300 (-0.065)
Player: 31.73% (G:14.32% B:0.15%)
Opponent: 68.27% (G:15.27% B:0.81%)
Confidence: ±0.008 (-0.308..-0.291) - [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

On 3/1/2022 8:37 AM, Timothy Chow wrote:
> XGID=--AC-CCbB---aBa--bbcbb-A--:1:1:1:41:0:0:0:0:10
>
> 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 O O     X    |
> | X           O O |   | O O O          |
> |                  |   | O                |
> |                  |   |                  |
> |                  |   |                  |
> |                  |BAR|                  |
> |                  |   |                  |
> |                  |   |                  |
> |                  |   | X X     X       | +---+
> |             X O |   | X X     X       | | 2 |
> | O           X O |   | X X     X X    | +---+
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 109 O: 126 X-O: 0-0
> Cube: 2, X own cube
> X to play 41
>
> I wanted to post this now, but am in a bit of a hurry so I won't post
> any commentary right now. Maybe later.
>
>     1. Rollout¹    13/12* 6/2                   eq:-0.322
>       Player:   31.09% (G:13.99% B:0.28%)
>       Opponent: 68.91% (G:15.89% B:0.94%)
>       Confidence: ±0.009 (-0.331..-0.313) - [100.0%]
>
>     2. Rollout¹    23/22 6/2                    eq:-0.402 (-0.080)
>       Player:   28.62% (G:9.23% B:0.22%)
>       Opponent: 71.38% (G:15.71% B:0.57%)
>       Confidence: ±0.008 (-0.409..-0.394) - [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

Subject	Author
Hit or step up?	Timothy Chow
Rollout: Hit or step up?	Timothy Chow
Re: Rollout: Hit or step up?	Timothy Chow