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interests / rec.games.backgammon / Rollout: Containment: hit and then...?

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* Containment: hit and then...?Timothy Chow
`- Rollout: Containment: hit and then...?Timothy Chow

1
Containment: hit and then...?

<ubvjmg$1sknj$3@dont-email.me>

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https://www.novabbs.com/interests/article-flat.php?id=12685&group=rec.games.backgammon#12685

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Containment: hit and then...?
Date: Mon, 21 Aug 2023 08:01:20 -0400
Organization: A noiseless patient Spider
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 by: Timothy Chow - Mon, 21 Aug 2023 12:01 UTC

XGID=-ABBaBC--CB--a--------cdf-:2:-1:1:51:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| O | | O O O | +---+
| | | O O O | | 4 |
| | | O O O | +---+
| | | O O |
| | | 6 |
| |BAR| |
| | | |
| | | |
| X | | X |
| X X | | X X X X |
| X X | | X X O X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 86 O: 56 X-O: 0-0
Cube: 4, O own cube
X to play 51

---
Tim Chow

Rollout: Containment: hit and then...?

<uc4vdu$2u3v1$1@dont-email.me>

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Containment: hit and then...?
Date: Wed, 23 Aug 2023 08:52:13 -0400
Organization: A noiseless patient Spider
Lines: 82
Message-ID: <uc4vdu$2u3v1$1@dont-email.me>
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 by: Timothy Chow - Wed, 23 Aug 2023 12:52 UTC

XGID=-ABBaBC--CB--a--------cdf-:2:-1:1:51:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| O | | O O O | +---+
| | | O O O | | 4 |
| | | O O O | +---+
| | | O O |
| | | 6 |
| |BAR| |
| | | |
| | | |
| X | | X |
| X X | | X X X X |
| X X | | X X O X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 86 O: 56 X-O: 0-0
Cube: 4, O own cube
X to play 51

I thought it was too bold to leave the 4pt slotted and give O a double
shot from the bar. But XG says it's okay. If O had a four-point board
then it would be a different story (see variant).

1. Rollout¹ 9/4* 6/5 eq:+0.530
Player: 75.59% (G:12.76% B:0.34%)
Opponent: 24.41% (G:3.49% B:0.01%)
Confidence: ±0.005 (+0.525..+0.536) - [100.0%]

2. Rollout¹ 9/4* 4/3 eq:+0.455 (-0.076)
Player: 73.21% (G:8.83% B:0.21%)
Opponent: 26.79% (G:1.74% B:0.00%)
Confidence: ±0.005 (+0.450..+0.459) - [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=-ABBaBC--CB--a-------bcdd-:2:-1:1:51:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| O | | O O O O | +---+
| | | O O O O | | 4 |
| | | O O O | +---+
| | | O O |
| | | |
| |BAR| |
| | | |
| | | |
| X | | X |
| X X | | X X X X |
| X X | | X X O X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 86 O: 62 X-O: 0-0
Cube: 4, O own cube
X to play 51

1. Rollout¹ 9/4* 4/3 eq:+0.277
Player: 67.17% (G:5.92% B:0.14%)
Opponent: 32.83% (G:2.31% B:0.01%)
Confidence: ±0.005 (+0.272..+0.282) - [100.0%]

2. Rollout¹ 9/4* 6/5 eq:+0.248 (-0.029)
Player: 66.01% (G:8.84% B:0.21%)
Opponent: 33.99% (G:5.75% B:0.03%)
Confidence: ±0.005 (+0.243..+0.253) - [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
. Path: i2pn2.org!i2pn.org!eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Timothy Chow <tchow12000@yahoo.com>
Newsgroups: rec.games.backgammon
Subject: Rollout: Containment: hit and then...?
Date: Wed, 23 Aug 2023 08:52:13 -0400
Organization: A noiseless patient Spider
Lines: 82
Message-ID: <uc4vdu$2u3v1$1@dont-email.me>
References: <ubvjmg$1sknj$3@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
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Injection-Date: Wed, 23 Aug 2023 12:52:14 -0000 (UTC)
Injection-Info: dont-email.me; posting-host="35b842eba24012b686dfd1e712bc8659";
logging-data="3084257"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+ovY2fvYBIpyRpVuUBqZP88y/CCnIPyKw="
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Xref: rslight2 rec.games.backgammon:12693

XGID=-ABBaBC--CB--a--------cdf-:2:-1:1:51:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| O | | O O O | +---+
| | | O O O | | 4 |
| | | O O O | +---+
| | | O O |
| | | 6 |
| |BAR| |
| | | |
| | | |
| X | | X |
| X X | | X X X X |
| X X | | X X O X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 86 O: 56 X-O: 0-0
Cube: 4, O own cube
X to play 51

I thought it was too bold to leave the 4pt slotted and give O a double
shot from the bar. But XG says it's okay. If O had a four-point board
then it would be a different story (see variant).

1. Rollout¹ 9/4* 6/5 eq:+0.530
Player: 75.59% (G:12.76% B:0.34%)
Opponent: 24.41% (G:3.49% B:0.01%)
Confidence: ±0.005 (+0.525..+0.536) - [100.0%]

2. Rollout¹ 9/4* 4/3 eq:+0.455 (-0.076)
Player: 73.21% (G:8.83% B:0.21%)
Opponent: 26.79% (G:1.74% B:0.00%)
Confidence: ±0.005 (+0.450..+0.459) - [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=-ABBaBC--CB--a-------bcdd-:2:-1:1:51:0:0:0:0:10

Score is X:0 O:0. Unlimited Game
+13-14-15-16-17-18------19-20-21-22-23-24-+
| O | | O O O O | +---+
| | | O O O O | | 4 |
| | | O O O | +---+
| | | O O |
| | | |
| |BAR| |
| | | |
| | | |
| X | | X |
| X X | | X X X X |
| X X | | X X O X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 86 O: 62 X-O: 0-0
Cube: 4, O own cube
X to play 51

1. Rollout¹ 9/4* 4/3 eq:+0.277
Player: 67.17% (G:5.92% B:0.14%)
Opponent: 32.83% (G:2.31% B:0.01%)
Confidence: ±0.005 (+0.272..+0.282) - [100.0%]

2. Rollout¹ 9/4* 6/5 eq:+0.248 (-0.029)
Player: 66.01% (G:8.84% B:0.21%)
Opponent: 33.99% (G:5.75% B:0.03%)
Confidence: ±0.005 (+0.243..+0.253) - [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

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