novaBBS - rec.games.backgammon - Is this a backgame? 2

Is this a backgame? 2

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Is this a backgame? 2
Date: Wed, 25 Oct 2023 22:40:29 -0400
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by: Timothy Chow - Thu, 26 Oct 2023 02:40 UTC

XGID=----ACB-Bb---A-b-cbdBBbA-A:1:1:1:55:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| X O O O | | O X X O X |
| O O O | | O X X O |
| O | | O |
| | | O |
| | X | |
| |BAR| |
| | | |
| | | |
| | | X | +---+
| O X | | X X | | 2 |
| O X | | X X X | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 190 O: 120 X-O: 0-0
Cube: 2, X own cube
X to play 55

---
Tim Chow

Re: Is this a backgame? 2

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Subject: Re: Is this a backgame? 2
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by: Frank Berger - Thu, 26 Oct 2023 14:56 UTC

Re: Is this a backgame? 2

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Subject: Re: Is this a backgame? 2
From: bananabo...@gmail.com (Stick Rice)
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by: Stick Rice - Thu, 26 Oct 2023 17:00 UTC

On Wednesday, October 25, 2023 at 10:40:32 PM UTC-4, Timothy Chow wrote:
> XGID=----ACB-Bb---A-b-cbdBBbA-A:1:1:1:55:0:0:0:0:10
>
> Score is X:0 O:0. Unlimited Game
> +13-14-15-16-17-18------19-20-21-22-23-24-+
> | X O O O | | O X X O X |
> | O O O | | O X X O |
> | O | | O |
> | | | O |
> | | X | |
> | |BAR| |
> | | | |
> | | | |
> | | | X | +---+
> | O X | | X X | | 2 |
> | O X | | X X X | +---+
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 190 O: 120 X-O: 0-0
> Cube: 2, X own cube
> X to play 55
>
> ---
> Tim Chow

Obvi.

Stick

Re: Is this a backgame? 2

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From: ah_c...@ymail.com (ah...Clem)
Newsgroups: rec.games.backgammon
Subject: Re: Is this a backgame? 2
Date: Fri, 27 Oct 2023 11:46:50 -0400
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by: ah...Clem - Fri, 27 Oct 2023 15:46 UTC

On 10/25/2023 10:40 PM, Timothy Chow wrote:
> XGID=----ACB-Bb---A-b-cbdBBbA-A:1:1:1:55:0:0:0:0:10
>
> Score is X:0 O:0. Unlimited Game
> +13-14-15-16-17-18------19-20-21-22-23-24-+
> | X     O     O O |   | O X X O X    |
> |       O     O O |   | O X X O       |
> |             O    |   | O                |
> |                  |   | O                |
> |                  | X |                  |
> |                  |BAR|                  |
> |                  |   |                  |
> |                  |   |                  |
> |                  |   |    X             | +---+
> |          O X    |   | X X             | | 2 |
> |          O X    |   | X X X          | +---+
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 190 O: 120 X-O: 0-0
> Cube: 2, X own cube
> X to play 55

Well, it was until X rolled the 55. 70 pips of timing is adequate for a
backgame. 50 is not enough.

So, looks like it's time to run off the anchor. bar/20 21/16(2) 13/8 and
hope O coughs up a shot.

Rollout: Is this a backgame? 2

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Is this a backgame? 2
Date: Sat, 28 Oct 2023 08:52:17 -0400
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by: Timothy Chow - Sat, 28 Oct 2023 12:52 UTC

XGID=----ACB-Bb---A-b-cbdBBbA-A:1:1:1:55:0:0:0:0:10

Sometimes I panic too soon when I get a roll like this. Like ah...Clem,
I decided to abandon one of my anchors, fearing that my position would
otherwise collapse because of poor timing. However, abandoning an
anchor is very committal, and XG strongly recommends sitting tight for
now. This 55 can be absorbed, and O's broken four-prime is not so
threatening---X has good chances of being able to free another checker
soon and preserve his timing.

1. Rollout¹ Bar/20 13/3 8/3 eq:-0.301
Player: 34.46% (G:5.85% B:0.19%)
Opponent: 65.54% (G:17.65% B:0.42%)
Confidence: ±0.010 (-0.310..-0.291) - [100.0%]

2. Rollout¹ Bar/20 13/3 6/1 eq:-0.484 (-0.183)
Player: 29.64% (G:4.02% B:0.14%)
Opponent: 70.36% (G:22.86% B:0.50%)
Confidence: ±0.010 (-0.494..-0.474) - [0.0%]

3. Rollout¹ Bar/20 13/8 6/1(2) eq:-0.511 (-0.210)
Player: 27.78% (G:3.48% B:0.08%)
Opponent: 72.22% (G:20.69% B:0.31%)
Confidence: ±0.009 (-0.519..-0.502) - [0.0%]

4. Rollout¹ Bar/20 8/3(2) 6/1 eq:-0.514 (-0.213)
Player: 30.99% (G:4.87% B:0.17%)
Opponent: 69.01% (G:30.31% B:0.80%)
Confidence: ±0.011 (-0.526..-0.503) - [0.0%]

5. Rollout¹ Bar/20 21/16(2) 8/3 eq:-0.533 (-0.232)
Player: 30.97% (G:5.75% B:0.24%)
Opponent: 69.03% (G:31.99% B:1.76%)
Confidence: ±0.010 (-0.543..-0.522) - [0.0%]

6. Rollout¹ Bar/20 21/16(2) 13/8 eq:-0.546 (-0.246)
Player: 26.57% (G:4.50% B:0.16%)
Opponent: 73.43% (G:22.17% B:0.40%)
Confidence: ±0.009 (-0.555..-0.537) - [0.0%]

7. Rollout¹ Bar/20 21/6 eq:-0.547 (-0.246)
Player: 31.31% (G:5.84% B:0.23%)
Opponent: 68.69% (G:34.89% B:1.67%)
Confidence: ±0.010 (-0.557..-0.536) - [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=---AACB-Ab---A-b-cbdBBbA-A:1:1:1:55:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| X O O O | | O X X O X |
| O O O | | O X X O |
| O | | O |
| | | O |
| | X | |
| |BAR| |
| | | |
| | | |
| | | X | +---+
| O | | X X | | 2 |
| O X | | X X X X | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 185 O: 120 X-O: 0-0
Cube: 2, X own cube
X to play 55

1. Rollout¹ Bar/20 13/3 8/3 eq:-0.404
Player: 30.65% (G:4.70% B:0.16%)
Opponent: 69.35% (G:17.20% B:0.35%)
Confidence: ±0.009 (-0.413..-0.395) - [100.0%]

2. Rollout¹ Bar/20 21/16(2) 8/3 eq:-0.430 (-0.026)
Player: 32.04% (G:6.09% B:0.24%)
Opponent: 67.96% (G:25.08% B:0.92%)
Confidence: ±0.010 (-0.440..-0.420) - [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

Your lucky color has faded.

interests / rec.games.backgammon / Is this a backgame? 2

interests / rec.games.backgammon / Is this a backgame? 2

Subject	Author
Is this a backgame? 2	Timothy Chow
Re: Is this a backgame? 2	Frank Berger
Re: Is this a backgame? 2	Stick Rice
Re: Is this a backgame? 2	ah...Clem
Rollout: Is this a backgame? 2	Timothy Chow