Rocksolid Light

Welcome to novaBBS (click a section below)

mail  files  register  newsreader  groups  login

Message-ID:  

The superfluous is very necessary. -- Voltaire

interests / rec.games.backgammon / Make the 5pt and then...?

SubjectAuthor
* Make the 5pt and then...?Timothy Chow
`- Rollout: Make the 5pt and then...?Timothy Chow

1
Make the 5pt and then...?

<stbg7c$c07$2@dont-email.me>

  copy mid

https://www.novabbs.com/interests/article-flat.php?id=8130&group=rec.games.backgammon#8130

  copy link   Newsgroups: rec.games.backgammon
Path: i2pn2.org!i2pn.org!eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Make the 5pt and then...?
Date: Tue, 1 Feb 2022 09:31:07 -0500
Organization: A noiseless patient Spider
Lines: 23
Message-ID: <stbg7c$c07$2@dont-email.me>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Tue, 1 Feb 2022 14:31:08 -0000 (UTC)
Injection-Info: reader02.eternal-september.org; posting-host="742e899caaa2dc78cf4ff087aadb7fdb";
logging-data="12295"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/JDKbNkjDiT69tXHiJSjqFaix2AT2B8Ac="
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101
Thunderbird/91.5.1
Cancel-Lock: sha1:CWd1FQJ7OEv/Uvox3IVNYdLNTs4=
Content-Language: en-US
 by: Timothy Chow - Tue, 1 Feb 2022 14:31 UTC

XGID=-A--a-D-Da--bE---e-d--b-A-:0:0:1:11:0:0:0:0:10

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 X |
| X O | | O O |
| X O | | O |
| X O | | O |
| X O | | |
| |BAR| |
| | | |
| X | | X |
| X | | X |
| O X | | X |
| O O X | | X O X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 146 O: 133 X-O: 0-0
Cube: 1
X to play 11

---
Tim Chow

Rollout: Make the 5pt and then...?

<stgo9e$qpu$1@dont-email.me>

  copy mid

https://www.novabbs.com/interests/article-flat.php?id=8138&group=rec.games.backgammon#8138

  copy link   Newsgroups: rec.games.backgammon
Path: i2pn2.org!i2pn.org!eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Make the 5pt and then...?
Date: Thu, 3 Feb 2022 09:19:24 -0500
Organization: A noiseless patient Spider
Lines: 94
Message-ID: <stgo9e$qpu$1@dont-email.me>
References: <stbg7c$c07$2@dont-email.me>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Date: Thu, 3 Feb 2022 14:19:26 -0000 (UTC)
Injection-Info: reader02.eternal-september.org; posting-host="db304ae17d69e690433a80a0cba7e802";
logging-data="27454"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/dtxFduBuv4uCU0GZgmEPvq5YJ8atZQIo="
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101
Thunderbird/91.5.1
Cancel-Lock: sha1:mxtnZRqv07XFTOsTvX7VRnqYNvI=
In-Reply-To: <stbg7c$c07$2@dont-email.me>
Content-Language: en-US
 by: Timothy Chow - Thu, 3 Feb 2022 14:19 UTC

XGID=-A--a-D-Da--bE---e-d--b-A-:0:0:1:11:0:0:0:0:10

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 X |
| X O | | O O |
| X O | | O |
| X O | | O |
| X O | | |
| |BAR| |
| | | |
| X | | X |
| X | | X |
| O X | | X |
| O O X | | X O X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 146 O: 133 X-O: 0-0
Cube: 1
X to play 11

Typically, in the early game, if you have an extra spare on the 8pt and
you roll 11, then 8/7(2) 6/5(2) is the best play, making a four-prime.
Here, the situation is slightly unusual, since O has escaped one checker
and her straggler is on X's 4pt. That means the four-prime is not as
effective as it typically is, and there's also the option of PoH. XG
strongly favors PoH even though it gives O a direct shot at X's blot on
the 1pt. However, if we move a spare from X's midpoint to X's 8pt, then
the rollout indicates a toss-up (see variant below).

1. Rollout¹ 6/4*(2) eq:-0.264
Player: 43.75% (G:10.99% B:0.36%)
Opponent: 56.25% (G:16.40% B:0.67%)
Confidence: ±0.012 (-0.277..-0.252) - [100.0%]

2. Rollout¹ 8/7(2) 6/5(2) eq:-0.356 (-0.091)
Player: 40.71% (G:9.58% B:0.25%)
Opponent: 59.29% (G:13.76% B:0.39%)
Confidence: ±0.011 (-0.366..-0.345) - [0.0%]

3. Rollout¹ 8/5 6/5 eq:-0.389 (-0.125)
Player: 39.85% (G:9.33% B:0.22%)
Opponent: 60.15% (G:13.57% B:0.39%)
Confidence: ±0.012 (-0.401..-0.378) - [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

-------
Variant
-------

XGID=-A--a-D-Ea--bD---e-d--b-A-:0:0:1:11:0:0:0:0:10

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 X |
| X O | | O O |
| X O | | O |
| X O | | O |
| O | | |
| |BAR| |
| X | | |
| X | | X |
| X | | X |
| O X | | X |
| O O X | | X O X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 141 O: 133 X-O: 0-0
Cube: 1
X to play 11

1. Rollout¹ 6/4*(2) eq:-0.194
Player: 45.32% (G:11.41% B:0.37%)
Opponent: 54.68% (G:14.38% B:0.60%)
Confidence: ±0.006 (-0.201..-0.188) - [70.6%]

2. Rollout¹ 8/7(2) 6/5(2) eq:-0.197 (-0.002)
Player: 44.43% (G:10.73% B:0.25%)
Opponent: 55.57% (G:11.27% B:0.37%)
Confidence: ±0.006 (-0.203..-0.191) - [29.4%]

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

1
server_pubkey.txt

rocksolid light 0.9.8
clearnet tor