novaBBS - rec.games.backgammon

Gammon go play 2

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Gammon go play 2
Date: Tue, 24 Jan 2023 09:58:54 -0500
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by: Timothy Chow - Tue, 24 Jan 2023 14:58 UTC

XGID=-BbBCBB----Ab--b-bBb--Ada-:0:0:1:65:0:1:1:2:10

Score is X:0 O:1 2 pt.(s) match.
+13-14-15-16-17-18------19-20-21-22-23-24-+
| O O X | | O X O O |
| O O X | | O O |
| | | O |
| | | O |
| | | |
| |BAR| |
| | | |
| | | |
| | | X |
| O | | X X X X O X |
| O X | | X X X X O X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 111 O: 129 X-O: 0-1/2 Crawford
Cube: 1
X to play 65

---
Tim Chow

Rollout: Gammon go play 2

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Gammon go play 2
Date: Thu, 26 Jan 2023 08:07:17 -0500
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by: Timothy Chow - Thu, 26 Jan 2023 13:07 UTC

XGID=-BbBCBB----Ab--b-bBb--Ada-:0:0:1:65:0:1:1:2:10

X obviously has a massive positional advantage. He has a five-point
board, while O has a bunch of semi-dead checkers and stripped points.
At gammon go, X wants to maximize contact, and blots be damned.

1. Rollout¹ 18/13 11/5 eq:+0.973
Player: 77.12% (G:21.51% B:4.49%)
Opponent: 22.88% (G:2.61% B:0.03%)
Confidence: ±0.006 (+0.967..+0.978) - [100.0%]

2. Rollout¹ 18/7 eq:+0.906 (-0.067)
Player: 73.33% (G:21.96% B:3.22%)
Opponent: 26.67% (G:5.84% B:0.18%)
Confidence: ±0.006 (+0.900..+0.911) - [0.0%]

3. Rollout¹ 22/11 eq:+0.899 (-0.074)
Player: 81.77% (G:13.18% B:1.58%)
Opponent: 18.23% (G:1.11% B:0.02%)
Confidence: ±0.005 (+0.894..+0.904) - [0.0%]

4. Rollout¹ 22/16 11/6 eq:+0.894 (-0.079)
Player: 80.76% (G:13.92% B:1.88%)
Opponent: 19.24% (G:1.63% B:0.02%)
Confidence: ±0.005 (+0.889..+0.899) - [0.0%]

5. Rollout¹ 22/16 18/13 eq:+0.861 (-0.111)
Player: 79.60% (G:13.46% B:1.35%)
Opponent: 20.40% (G:2.80% B:0.07%)
Confidence: ±0.005 (+0.857..+0.866) - [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, MET: Kazaross XG2

---
Tim Chow

Re: Gammon go play 2

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Subject: Re: Gammon go play 2
From: pepste...@gmail.com (peps...@gmail.com)
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by: peps...@gmail.com - Fri, 27 Jan 2023 15:45 UTC

On Tuesday, January 24, 2023 at 2:58:55 PM UTC, Tim Chow wrote:
> XGID=-BbBCBB----Ab--b-bBb--Ada-:0:0:1:65:0:1:1:2:10
>
> Score is X:0 O:1 2 pt.(s) match.
> +13-14-15-16-17-18------19-20-21-22-23-24-+
> | O O X | | O X O O |
> | O O X | | O O |
> | | | O |
> | | | O |
> | | | |
> | |BAR| |
> | | | |
> | | | |
> | | | X |
> | O | | X X X X O X |
> | O X | | X X X X O X |
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 111 O: 129 X-O: 0-1/2 Crawford
> Cube: 1
> X to play 65
>
> ---
> Tim Chow

Since you say "at gammon go", I'm a bit surprised
that you're not posting variantizations for DMP and money.

Any rebuttal of the form "Why don't you do it yourself?"
is answered by the fact that my only computer with XG on
is busted. I know there are workarounds for that, but I'm lazy.

Paul

Re: Gammon go play 2

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Re: Gammon go play 2
Date: Fri, 27 Jan 2023 23:51:11 -0500
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by: Timothy Chow - Sat, 28 Jan 2023 04:51 UTC

On 1/27/2023 10:45 AM, peps...@gmail.com wrote:
> Since you say "at gammon go", I'm a bit surprised
> that you're not posting variantizations for DMP and money.

Fair enough. Below is a money rollout. I don't think that a DMP
rollout is necessary since 18/13 11/5 is not remotely close at DMP.

XGID=-BbBCBB----Ab--b-bBb--Ada-:1:-1:1:65:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| O O X | | O X O O | +---+
| O O X | | O O | | 2 |
| | | O | +---+
| | | O |
| | | |
| |BAR| |
| | | |
| | | |
| | | X |
| O | | X X X X O X |
| O X | | X X X X O X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 111 O: 129 X-O: 0-0
Cube: 2, O own cube
X to play 65

1. Rollout¹ 22/11 eq:+0.673
Player: 80.26% (G:15.64% B:0.66%)
Opponent: 19.74% (G:1.48% B:0.03%)
Confidence: ±0.006 (+0.667..+0.679) - [100.0%]

2. Rollout¹ 22/16 11/6 eq:+0.654 (-0.019)
Player: 78.94% (G:16.80% B:0.73%)
Opponent: 21.06% (G:1.87% B:0.04%)
Confidence: ±0.006 (+0.648..+0.661) - [0.0%]

3. Rollout¹ 18/13 11/5 eq:+0.618 (-0.055)
Player: 74.64% (G:25.47% B:1.34%)
Opponent: 25.36% (G:4.25% B:0.14%)
Confidence: ±0.008 (+0.610..+0.625) - [0.0%]

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

---
Tim Chow
eXtreme Gammon Version: 2.19.211.pre-release

---
Tim Chow

Re: Gammon go play 2

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From: ah_c...@ymail.com (ah...Clem)
Newsgroups: rec.games.backgammon
Subject: Re: Gammon go play 2
Date: Sat, 28 Jan 2023 08:11:13 -0500
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by: ah...Clem - Sat, 28 Jan 2023 13:11 UTC

On 1/24/2023 9:58 AM, Timothy Chow wrote:
> XGID=-BbBCBB----Ab--b-bBb--Ada-:0:0:1:65:0:1:1:2:10
>
> Score is X:0 O:1 2 pt.(s) match.
> +13-14-15-16-17-18------19-20-21-22-23-24-+
> |       O     O X |   | O        X O O |
> |       O     O X |   | O           O    |
> |                  |   |             O    |
> |                  |   |             O    |
> |                  |   |                  |
> |                  |BAR|                  |
> |                  |   |                  |
> |                  |   |                  |
> |                  |   |       X          |
> | O                |   | X X X X O X |
> | O X             |   | X X X X O X |
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 111 O: 129 X-O: 0-1/2 Crawford
> Cube: 1
> X to play 65

O's structure is awful and an exchange of hits massively favors X. So,
I'll provoke that with 18/7. Not sure if it's right, but also not sure
if it is right for O to hit.

Why is it taking so long for her to bring out all the good in you?

interests / rec.games.backgammon / Gammon go play 2

Subject	Author
Gammon go play 2	Timothy Chow
Rollout: Gammon go play 2	Timothy Chow
Re: Gammon go play 2	peps...@gmail.com
Re: Gammon go play 2	Timothy Chow
Re: Gammon go play 2	ah...Clem