April 15, 2007 by fowgre
Here’s a situation that arose yesterday during the ongoing G. v D. money session at GCCRC.
Should “O” double? If so, should “X” take?
The score (after 0 games) is: P0 82, P1 107
Match Information:
Date: April 13, 2007
Move number 6: O on roll, cube decision?
GNU Backgammon Position ID: 3lkAANj5AQAAAA
Match ID : AgEAACAFWAMA
+12-11-10--9--8--7-------6--5--4--3--2--1-+ O: P0 (Cube: 4)
| | | O O O | O 82 points
| | | O O O | O On roll
| | | O O | O
| | | O | O
| | | 6 |
^| |BAR| |
| | | | X
| | | X | X
| | | X X | X
| | | X X X | X
| | | X X X X | X 107 points
+13-14-15-16-17-18------19-20-21-22-23-24-+ X: P1
Pip counts: O 32, X 33
|
I’ve done a rollout using gnuBG, but I’ll wait a couple of days before posting the result. In the meantime, post your opinion/reasoning using the Comment box below (sorry, no prizes for correct answers).
Cube analysis
Rollout cubeless equity +0.142
Cubeful equities:
1. No double +0.302
2. Double, pass +1.000 ( +0.69 
3. Double, take +0.007 ( -0.295)
Proper cube action: No redouble, take (29.7%)
Rollout details:
Player P0 owns 4-cube:
0.571 0.000 0.000 - 0.429 0.000 0.000 CL +0.142 CF +0.302
[0.000 0.000 0.000 - 0.000 0.000 0.000 CL 0.000 CF 0.000]
Player P1 owns 8-cube:
0.571 0.000 0.000 - 0.429 0.000 0.000 CL +0.284 CF +0.007
[0.000 0.000 0.000 - 0.000 0.000 0.000 CL 0.000 CF 0.000]
Full cubeful rollout with var.redn.
60656 games, Mersenne Twister dice gen. with seed 1057640406 and quasi-random dice
Play: supremo 2-ply cubeful prune [world class]
keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
Skip pruning for 1-ply moves.
Cube: 2-ply cubeful prune [world class]
|
Posted in Bearoff, Lessons, backgammon | No Comments »
April 14, 2007 by fowgre
Please note the following change in club policy.
As of May 3, 2007, players who have not attended a weekly meeting within the previous 12 months will be dropped from the membership list. Persons whose membership has lapsed for non-attendance will subsequently be allowed to attend a meeting and re-register if they wish to do so (ratings/exp reset to zero).
Posted in backgammon | 1 Comment »
April 8, 2007 by fowgre
| Name |
Record |
Rating |
Exp |
Tournament
Points
Y-T-D |
| W |
L |
| Greg |
|
160 |
73 |
1757.79 |
2165 |
|
| Matt |
|
66 |
40 |
1688.18 |
547 |
|
| Andrew |
|
13 |
6 |
1663.81 |
133 |
|
| Karen |
|
10 |
3 |
1611.11 |
67 |
|
| Derek |
|
111 |
127 |
1560.54 |
2196 |
|
| Sharon |
|
4 |
2 |
1551.52 |
28 |
|
| Martha |
|
34 |
24 |
1529.83 |
251 |
|
| Ralph |
|
1 |
0 |
1520.92 |
5 |
|
| Craig |
|
2 |
2 |
1505.10 |
28 |
|
| Joanne |
|
1 |
1 |
1502.70 |
14 |
|
| Don |
|
1 |
1 |
1487.32 |
6 |
|
| Ken |
|
0 |
1 |
1483.74 |
3 |
|
| Whymark |
|
1 |
2 |
1479.69 |
17 |
|
| Kathy |
|
0 |
3 |
1470.28 |
3 |
|
| Kevin |
|
0 |
3 |
1444.41 |
15 |
|
| Herbie |
|
12 |
19 |
1439.63 |
169 |
|
| Al |
|
0 |
3 |
1437.87 |
17 |
|
| Ray |
|
37 |
54 |
1431.02 |
501 |
|
| Denise |
|
1 |
6 |
1416.06 |
35 |
|
| Donna |
|
11 |
17 |
1409.09 |
107 |
|
| Julie |
|
0 |
5 |
1402.69 |
35 |
|
| Nora |
|
39 |
70 |
1369.65 |
604 |
|
| Barry |
|
5 |
18 |
1308.20 |
88 |
|
| Terry |
|
6 |
33 |
1218.61 |
211 |
|
| Steve |
|
0 |
0 |
|
0 |
|
| Wanda |
|
0 |
0 |
|
0 |
|
| Susan |
|
0 |
0 |
|
0 |
|
| Criss |
|
0 |
0 |
|
0 |
|
| Judy |
|
0 |
0 |
|
0 |
|
| Lisa |
|
0 |
0 |
|
0 |
|
| Iaan |
|
0 |
0 |
|
0 |
|
| Karen |
|
0 |
0 |
|
0 |
|
| Matches In Progress |
DATE
STARTED |
PTS |
PLAYER 01 |
PLAYER 02 |
COMMENT |
| Name |
Score |
Name |
Score |
| 2006/01/19 |
5 |
Greg |
1 |
Joanne |
1 |
|
| 2006/03/23 |
5 |
Ray |
0 |
Kevin |
2 |
|
| 2006/03/30 |
5 |
Matt |
2 |
Karen |
2 |
|
| 2006/04/06 |
3 |
Martha |
0 |
Karen |
2 |
Crawford. |
| 2007/02/22 |
7 |
Craig |
5 |
Nora |
5 |
|
| 2007/02/22 |
7 |
Craig |
4 |
Greg |
1 |
|
| 2007/03/15 |
7 |
Nora |
6 |
Derek |
5 |
Crawford. |
| 2007/04/05 |
7 |
Derek |
6 |
Andrew |
1 |
Post-Crawford. |
| 2007/04/05 |
7 |
Matt |
3 |
Julie |
2 |
|
| |
|
|
|
|
|
|
Posted in Ratings, backgammon | No Comments »
April 8, 2007 by fowgre
| Name |
Record |
Rating |
Exp |
Tournament
Points
Y-T-D |
| W |
L |
| Greg |
|
156 |
71 |
1756.49 |
2123 |
|
| Matt |
|
65 |
39 |
1687.99 |
533 |
|
| Andrew |
|
11 |
6 |
1629.43 |
119 |
|
| Karen |
|
10 |
3 |
1611.11 |
67 |
|
| Derek |
|
109 |
124 |
1560.45 |
2161 |
|
| Sharon |
|
4 |
2 |
1551.52 |
28 |
|
| Martha |
|
34 |
24 |
1529.83 |
251 |
|
| Ralph |
|
1 |
0 |
1520.92 |
5 |
|
| Craig |
|
2 |
2 |
1505.10 |
28 |
|
| Joanne |
|
1 |
1 |
1502.70 |
14 |
|
| Don |
|
1 |
1 |
1487.32 |
6 |
|
| Ken |
|
0 |
1 |
1483.74 |
3 |
|
| Whymark |
|
1 |
2 |
1479.69 |
17 |
|
| Kathy |
|
0 |
3 |
1470.28 |
3 |
|
| Julie |
|
0 |
2 |
1469.05 |
14 |
|
| Kevin |
|
0 |
3 |
1444.41 |
15 |
|
| Herbie |
|
12 |
19 |
1439.63 |
169 |
|
| Al |
|
0 |
3 |
1437.87 |
17 |
|
| Ray |
|
37 |
54 |
1431.02 |
501 |
|
| Denise |
|
1 |
6 |
1416.06 |
35 |
|
| Donna |
|
11 |
17 |
1409.09 |
107 |
|
| Nora |
|
39 |
70 |
1369.65 |
604 |
|
| Barry |
|
5 |
18 |
1308.20 |
88 |
|
| Terry |
|
6 |
33 |
1218.61 |
211 |
|
| Steve |
|
0 |
0 |
|
0 |
|
| Wanda |
|
0 |
0 |
|
0 |
|
| Susan |
|
0 |
0 |
|
0 |
|
| Criss |
|
0 |
0 |
|
0 |
|
| Judy |
|
0 |
0 |
|
0 |
|
| Lisa |
|
0 |
0 |
|
0 |
|
| Iaan |
|
0 |
0 |
|
0 |
|
| Karen |
|
0 |
0 |
|
0 |
|
| Matches In Progress |
DATE
STARTED |
PTS |
PLAYER 01 |
PLAYER 02 |
COMMENT |
| Name |
Score |
Name |
Score |
| 2006/01/19 |
5 |
Greg |
1 |
Joanne |
1 |
|
| 2006/03/23 |
5 |
Ray |
0 |
Kevin |
2 |
|
| 2006/03/30 |
5 |
Matt |
2 |
Karen |
2 |
|
| 2006/04/06 |
3 |
Martha |
0 |
Karen |
2 |
Crawford. |
| 2007/02/22 |
7 |
Craig |
5 |
Nora |
5 |
|
| 2007/02/22 |
7 |
Craig |
4 |
Greg |
1 |
|
| 2007/03/15 |
7 |
Nora |
6 |
Derek |
5 |
Crawford. |
| 2007/03/29 |
7 |
Greg |
6 |
Julie |
4 |
Post-Crawford. |
| |
|
|
|
|
|
|
Posted in Ratings, backgammon | No Comments »
March 24, 2007 by fowgre
| Name |
Record |
Rating |
Exp |
Tournament
Points
Y-T-D |
| W |
L |
| Greg |
|
155 |
71 |
1753.36 |
2116 |
|
| Matt |
|
65 |
39 |
1687.99 |
533 |
|
| Andrew |
|
11 |
6 |
1629.43 |
119 |
|
| Karen |
|
10 |
3 |
1611.11 |
67 |
|
| Derek |
|
109 |
124 |
1560.45 |
2161 |
|
| Sharon |
|
4 |
2 |
1551.52 |
28 |
|
| Martha |
|
34 |
24 |
1529.83 |
251 |
|
| Ralph |
|
1 |
0 |
1520.92 |
5 |
|
| Craig |
|
2 |
2 |
1505.10 |
28 |
|
| Joanne |
|
1 |
1 |
1502.70 |
14 |
|
| Don |
|
1 |
1 |
1487.32 |
6 |
|
| Ken |
|
0 |
1 |
1483.74 |
3 |
|
| Whymark |
|
1 |
2 |
1479.69 |
17 |
|
| Kathy |
|
0 |
3 |
1470.28 |
3 |
|
| Julie |
|
0 |
1 |
1469.05 |
7 |
|
| Kevin |
|
0 |
3 |
1444.41 |
15 |
|
| Herbie |
|
12 |
19 |
1439.63 |
169 |
|
| Al |
|
0 |
3 |
1437.87 |
17 |
|
| Ray |
|
37 |
54 |
1431.02 |
501 |
|
| Denise |
|
1 |
6 |
1416.06 |
35 |
|
| Donna |
|
11 |
17 |
1409.09 |
107 |
|
| Nora |
|
39 |
70 |
1369.65 |
604 |
|
| Barry |
|
5 |
18 |
1308.20 |
88 |
|
| Terry |
|
6 |
33 |
1218.61 |
211 |
|
| Steve |
|
0 |
0 |
|
0 |
|
| Wanda |
|
0 |
0 |
|
0 |
|
| Susan |
|
0 |
0 |
|
0 |
|
| Criss |
|
0 |
0 |
|
0 |
|
| Judy |
|
0 |
0 |
|
0 |
|
| Lisa |
|
0 |
0 |
|
0 |
|
| Iaan |
|
0 |
0 |
|
0 |
|
| Karen |
|
0 |
0 |
|
0 |
|
| Matches In Progress |
DATE
STARTED |
PTS |
PLAYER 01 |
PLAYER 02 |
COMMENT |
| Name |
Score |
Name |
Score |
| 2006/01/19 |
5 |
Greg |
1 |
Joanne |
1 |
|
| 2006/03/23 |
5 |
Ray |
0 |
Kevin |
2 |
|
| 2006/03/30 |
5 |
Matt |
2 |
Karen |
2 |
|
| 2006/04/06 |
3 |
Martha |
0 |
Karen |
2 |
Crawford. |
| 2007/02/22 |
7 |
Craig |
5 |
Nora |
5 |
|
| 2007/02/22 |
7 |
Craig |
4 |
Greg |
1 |
|
| 2007/03/15 |
7 |
Nora |
6 |
Derek |
5 |
Crawford. |
| |
|
|
|
|
|
|
Posted in Ratings, backgammon | No Comments »
