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interests / rec.games.backgammon / Re: Bear-off heuristics without contact

Re: Bear-off heuristics without contact

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From: tchow12...@yahoo.com (Timothy Chow)
Newsgroups: rec.games.backgammon
Subject: Re: Bear-off heuristics without contact
Date: Wed, 13 Apr 2022 21:19:52 -0400
Organization: A noiseless patient Spider
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Message-ID: <t37srn$6vr$1@dont-email.me>
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 by: Timothy Chow - Thu, 14 Apr 2022 01:19 UTC

Here are some positions from my files. I have lots more if there
are specific things you're looking for. For brevity, I have omitted
much of the rollout information that XG normally displays.

XGID=---AAAA----------------bd-:1:-1:1:32:0:0:0:0:10

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-+
| | | O O | +---+
| | | O O | | 2 |
| | | O | +---+
| | | O |
| | | |
| |BAR| |
| | | |
| | | |
| | | |
| | | |
| | | X X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 18 O: 8 X-O: 0-0
Cube: 2, O own cube
X to play 32

1. Rollout¹ 5/Off eq:-0.117
2. Rollout¹ 6/4 3/Off eq:-0.153 (-0.035)
3. Rollout¹ 4/2 3/Off eq:-0.173 (-0.055)

XGID=----BBB------------aa-aa--:1:1:1:52:0:0:0:0:10

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-+
| | | O O O O |
| | | |
| | | |
| | | |
| | | |
| |BAR| |
| | | |
| | | |
| | | | +---+
| | | X X X | | 2 |
| | | X X X | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 30 O: 16 X-O: 0-0
Cube: 2, X own cube
X to play 52

1. Rollout¹ 6/4 5/Off eq:-0.782
2. Rollout¹ 5/Off 4/2 eq:-0.838 (-0.056)
3. Rollout¹ 5/3 5/Off eq:-0.843 (-0.061)

XGID=--AAABB--------------b-ce-:1:-1:1:11:0:0:0:0:10

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-+
| | | O O O | +---+
| | | O O O | | 2 |
| | | O O | +---+
| | | O |
| | | O |
| |BAR| |
| | | |
| | | |
| | | |
| | | X X |
| | | X X X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 31 O: 19 X-O: 0-0
Cube: 2, O own cube
X to play 11

1. Rollout¹ 5/4 3/Off eq:+0.019
2. Rollout¹ 6/4 2/Off eq:+0.018 (-0.001)
3. Rollout¹ 5/3 2/Off eq:+0.003 (-0.016)
4. Rollout¹ 3/Off 2/1 eq:-0.004 (-0.023)
5. Rollout¹ 4/Off eq:-0.007 (-0.026)

XGID=--ABAAA-------------a-aab-:1:1:1:21:0:0:0:0:10

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-+
| | | O O O O |
| | | O |
| | | |
| | | |
| | | |
| |BAR| |
| | | |
| | | |
| | | | +---+
| | | X | | 2 |
| | | X X X X X | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 23 O: 12 X-O: 0-0
Cube: 2, X own cube
X to play 21

1. Rollout¹ 5/4 2/Off eq:-0.754
2. Rollout¹ 4/3 2/Off eq:-0.785 (-0.031)
3. Rollout¹ 6/5 2/Off eq:-0.795 (-0.041)
4. Rollout¹ 3/Off eq:-0.796 (-0.042)

XGID=--BCCBD------------cba-dc-:0:0:1:44:0:0:0:0:10

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-+
| | | O O O O O |
| | | O O O O |
| | | O O O |
| | | O |
| | | |
| |BAR| |
| | | |
| | | X |
| | | X X X |
| | | X X X X X |
| | | X X X X X |
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 59 O: 43 X-O: 0-0
Cube: 1
X to play 44

1. Rollout¹ 6/2 4/Off(3) eq:-0.047
2. Rollout¹ 5/1 4/Off(3) eq:-0.077 (-0.030)

XGID=-A-BB--------------a-aaa--:1:1:1:21:0:0:0:0:10

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-+
| | | O O O O |
| | | |
| | | |
| | | |
| | | |
| |BAR| |
| | | |
| | | |
| | | | +---+
| | | X X | | 2 |
| | | X X X | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 15 O: 15 X-O: 0-0
Cube: 2, X own cube
X to play 21

1. Rollout¹ 3/Off eq:-0.126
2. Rollout¹ 4/2 1/Off eq:-0.163 (-0.037)

XGID=--A-A-B-------------aaa---:1:1:1:61:0:0:0:0:10

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-+
| | | O O O |
| | | |
| | | |
| | | |
| | | |
| |BAR| |
| | | |
| | | |
| | | | +---+
| | | X | | 2 |
| | | X X X | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 18 O: 12 X-O: 0-0
Cube: 2, X own cube
X to play 61

1. Rollout¹ 6/Off 4/3 eq:-0.429
2. Rollout¹ 6/5 6/Off eq:-0.447 (-0.019)
3. Rollout¹ 6/Off 2/1 eq:-0.463 (-0.034)

XGID=-BCEB-B-------------a-acg-:1:1:1:22:0:0:0:0:10

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-+
| | | O O O O |
| | | O O |
| | | O O |
| | | O |
| | | 7 |
| |BAR| |
| | | X |
| | | X |
| | | X X | +---+
| | | X X X X X | | 2 |
| | | X X X X X | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 43 O: 21 X-O: 0-0
Cube: 2, X own cube
X to play 22

1. Rollout¹ 6/4 2/Off(3) eq:-0.494
2. Rollout¹ 4/Off 2/Off(2) eq:-0.520 (-0.026)
3. Rollout¹ 6/4(2) 2/Off(2) eq:-0.535 (-0.042)

XGID=---AADA---------------abb-:1:1:1:62:0:0:0:0:10

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-+
| | | O O O |
| | | O O |
| | | |
| | | |
| | | |
| |BAR| |
| | | |
| | | X |
| | | X | +---+
| | | X | | 2 |
| | | X X X X | +---+
+12-11-10--9--8--7-------6--5--4--3--2--1-+
Pip count X: 33 O: 9 X-O: 0-0
Cube: 2, X own cube
X to play 62

1. Rollout¹ 6/Off 3/1 eq:-0.895
2. Rollout¹ 6/Off 4/2 eq:-0.903 (-0.009)
3. Rollout¹ 6/4 5/Off eq:-0.932 (-0.037)
4. Rollout¹ 6/Off 5/3 eq:-0.934 (-0.039)

---
Tim Chow

SubjectRepliesAuthor
o Bear-off heuristics without contact

By: Axel Reichert on Thu, 7 Apr 2022

14Axel Reichert
server_pubkey.txt

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