Rocksolid Light

Welcome to novaBBS (click a section below)

mail  files  register  newsreader  groups  login

Message-ID:  

What an artist dies with me! -- Nero

interests / rec.games.backgammon / Blitz versus prime cube action

SubjectAuthor
* Blitz versus prime cube actionTimothy Chow
`- Rollout: Blitz versus prime cube actionTimothy Chow

1
Blitz versus prime cube action

<uo8mrj$21c0c$1@dont-email.me>

  copy mid

https://news.novabbs.com/interests/article-flat.php?id=13449&group=rec.games.backgammon#13449

  copy link   Newsgroups: rec.games.backgammon
Path: i2pn2.org!rocksolid2!news.neodome.net!news.mixmin.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Blitz versus prime cube action
Date: Wed, 17 Jan 2024 09:05:39 -0500
Organization: A noiseless patient Spider
Lines: 22
Message-ID: <uo8mrj$21c0c$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Wed, 17 Jan 2024 14:05:39 -0000 (UTC)
Injection-Info: dont-email.me; posting-host="57fe66107e9c68d402c5a10ced637d3d";
logging-data="2142220"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18liDgyUG1t/RhCMZvinTbBYRrwctYoT4w="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:quXDEHL1l8hkfyt8YWpSA+1POBc=
Content-Language: en-US
 by: Timothy Chow - Wed, 17 Jan 2024 14:05 UTC

XGID=bBBCB-B--A--b-a--bbdbA-AA-:0:0:1:00:0:0:0:0:10

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 X X X |
| O O | | O O |
| | | O |
| | | O |
| | | |
| |BAR| |
| | O | |
| | O | |
| | | X |
| O | | X X X X X |
| O X | | X X X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 112 O: 151 X-O: 0-0
Cube: 1
X on roll, cube action

---
Tim Chow

Rollout: Blitz versus prime cube action

<uoe4nr$36n6r$1@dont-email.me>

  copy mid

https://news.novabbs.com/interests/article-flat.php?id=13466&group=rec.games.backgammon#13466

  copy link   Newsgroups: rec.games.backgammon
Path: i2pn2.org!i2pn.org!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Rollout: Blitz versus prime cube action
Date: Fri, 19 Jan 2024 10:33:14 -0500
Organization: A noiseless patient Spider
Lines: 101
Message-ID: <uoe4nr$36n6r$1@dont-email.me>
References: <uo8mrj$21c0c$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Date: Fri, 19 Jan 2024 15:33:15 -0000 (UTC)
Injection-Info: dont-email.me; posting-host="3473e78e901425a73f195f8e60ddd821";
logging-data="3366107"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19VLDOHmasUIaxqe8UqPMpUV14R6azZ9qY="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:5TMTerAmlbgDJ6tk6fvPGvZk10Q=
In-Reply-To: <uo8mrj$21c0c$1@dont-email.me>
Content-Language: en-US
 by: Timothy Chow - Fri, 19 Jan 2024 15:33 UTC

XGID=bBBCB-B--A--b-a--bbdbA-AA-:0:0:1:00:0:0:0:0:10

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 X X X |
| O O | | O O |
| | | O |
| | | O |
| | | |
| |BAR| |
| | O | |
| | O | |
| | | X |
| O | | X X X X X |
| O X | | X X X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 112 O: 151 X-O: 0-0
Cube: 1
X on roll, cube action

Can O take? Two checkers on the bar against a five-point board, with a
third blot vulnerable to being hit as well, looks like a pretty dire
predicament. But X may have some difficulty leaping his back checkers
over O's prime before he is forced to crunch his board. The rollout
below says it's a pass, but just barely. Shifting X's spare on his
3pt to his 2pt causes XG to take (see variant below).

Analyzed in Rollout
No double
Player Winning Chances: 63.64% (G:46.08% B:0.79%)
Opponent Winning Chances: 36.36% (G:7.82% B:0.37%)
Double/Take
Player Winning Chances: 63.74% (G:46.55% B:0.63%)
Opponent Winning Chances: 36.26% (G:7.89% B:0.35%)

Cubeful Equities:
No double: +0.748 (-0.252)
Double/Take: +1.014 (+0.014)
Double/Pass: +1.000

Best Cube action: Double / Pass

Rollout:
1296 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller
Confidence No Double: ± 0.013 (+0.735..+0.761)
Confidence Double: ± 0.020 (+0.994..+1.033)

eXtreme Gammon Version: 2.19.211.pre-release

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

XGID=bBCBB-B--A--b-a--bbdbA-AA-:0:0:1:00:0:0:0:0:10

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 X X X |
| O O | | O O |
| | | O |
| | | O |
| | | |
| |BAR| |
| | O | |
| | O | |
| | | X |
| O | | X X X X X |
| O X | | X X X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 111 O: 151 X-O: 0-0
Cube: 1
X on roll, cube action

Analyzed in Rollout
No double
Player Winning Chances: 62.53% (G:45.18% B:0.73%)
Opponent Winning Chances: 37.47% (G:8.22% B:0.40%)
Double/Take
Player Winning Chances: 62.73% (G:45.75% B:0.62%)
Opponent Winning Chances: 37.27% (G:8.32% B:0.43%)

Cubeful Equities:
No double: +0.701 (-0.225)
Double/Take: +0.926
Double/Pass: +1.000 (+0.074)

Best Cube action: Double / Take

Rollout:
1296 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller
Confidence No Double: ± 0.014 (+0.686..+0.715)
Confidence Double: ± 0.021 (+0.905..+0.947)

eXtreme Gammon Version: 2.19.211.pre-release

---
Tim Chow

interests / rec.games.backgammon / Blitz versus prime cube action

1
server_pubkey.txt

rocksolid light 0.9.81
clearnet tor