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interests / rec.games.backgammon / Slot or not?

SubjectAuthor
* Slot or not?Timothy Chow
+- Re: Slot or not?atila...@gmail.com
`- Rollout: Slot or not?Timothy Chow

1
Slot or not?

<t6b02j$lds$2@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Slot or not?
Date: Sat, 21 May 2022 11:21:54 -0400
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 by: Timothy Chow - Sat, 21 May 2022 15:21 UTC

XGID=-b----EBB---cD--ac-d-b--B-:0:0:1:61:0:0:0:0:10

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 X |
| X O | | O |
| X | | O |
| | | |
| |BAR| |
| | | X |
| | | X |
| O | | X |
| O X X | | X O |
| O X X | | X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 160 O: 152 X-O: 0-0
Cube: 1
X to play 61

---
Tim Chow

Re: Slot or not?

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Subject: Re: Slot or not?
From: atilamal...@gmail.com (atila...@gmail.com)
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 by: atila...@gmail.com - Sat, 21 May 2022 23:11 UTC

21 Mayıs 2022 Cumartesi tarihinde saat 18:21:57 UTC+3 itibarıyla Tim Chow şunları yazdı:
> XGID=-b----EBB---cD--ac-d-b--B-:0:0:1:61:0:0:0:0:10
>
> 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 X |
> | X O | | O |
> | X | | O |
> | | | |
> | |BAR| |
> | | | X |
> | | | X |
> | O | | X |
> | O X X | | X O |
> | O X X | | X O |
> +12-11-10--9--8--7-------6--5--4--3--2--1-+
> Pip count X: 160 O: 152 X-O: 0-0
> Cube: 1
> X to play 61
>
> ---
> Tim Chow

Making the 5 point after making the bar point is a very powerful move. Especially if the opponent hasn't touched their back checkers yet. And a stripped eight point always forces you to use checkers on the 6 point.
Moreover, in this position, something has to be done to distract the opponent because he has very strong shots. I prefer the slot game. 13/7 6/5

Rollout: Slot or not?

<t6l8kr$87o$1@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Slot or not?
Date: Wed, 25 May 2022 08:49:30 -0400
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 by: Timothy Chow - Wed, 25 May 2022 12:49 UTC

XGID=-b----EBB---cD--ac-d-b--B-:0:0:1:61:0:0:0:0:10

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 X |
| X O | | O |
| X | | O |
| | | |
| |BAR| |
| | | X |
| | | X |
| O | | X |
| O X X | | X O |
| O X X | | X O |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 160 O: 152 X-O: 0-0
Cube: 1
X to play 61

Slotting this early in the game when your opponent has made her 5pt
or 4pt, and you have not made any new home-board points, is not usually
recommended by XG. Usually you want to split to avoid getting primed.
However, X is already somewhat behind in the pip count, and O has ten
checkers in the zone that can attack as well as prime. X does have a
heavy 6pt stack and making a solid four-prime would certainly be a
significant positional improvement.

At first I thought that duplication of O's 4s played an important
role, but after fiddling around with a few variants, I concluded
that this wasn't a major factor.

1. Rollout¹ 13/7 6/5 eq:-0.192
Player: 46.35% (G:13.43% B:0.69%)
Opponent: 53.65% (G:18.73% B:1.29%)
Confidence: ±0.008 (-0.199..-0.184) - [100.0%]

2. Rollout¹ 24/23 13/7 eq:-0.264 (-0.073)
Player: 44.73% (G:12.39% B:0.65%)
Opponent: 55.27% (G:20.32% B:0.79%)
Confidence: ±0.007 (-0.272..-0.257) - [0.0%]

¹ 5184 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

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