Attendance Warning

A reminder to all club members that this Thursday’s meeting (2007/05/03) is the last chance to avoid being dropped from the membership list for non-attendance (to review the new policy, click here).

Ratings - 2007/04/28

Name		Record		Rating	Exp	Tournament Points Y-T-D
		W	L
Greg		166	75	1765.16	2249
Matt		67	40	1692.44	554
Andrew		13	6	1663.81	133
Karen		10	3	1611.11	67
Derek		118	133	1570.91	2307
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	55	1426.74	508
Denise		1	6	1416.06	35
Donna		11	17	1409.09	107
Nora		39	73	1357.11	625
Julie		1	9	1349.24	70
Barry		5	18	1308.20	88
Terry		7	33	1238.09	218
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
2007/04/05	7	Derek	6	Andrew	1	Post-Crawford.
2007/04/05	7	Matt	3	Julie	2
2007/04/19	7	Ray	3	Julie	1

Ratings - 2007/04/21

Name		Record		Rating	Exp	Tournament Points Y-T-D
		W	L
Greg		162	74	1759.23	2198
Matt		67	40	1692.44	554
Andrew		13	6	1663.81	133
Karen		10	3	1611.11	67
Derek		115	130	1566.67	2253
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	55	1426.74	508
Denise		1	6	1416.06	35
Donna		11	17	1409.09	107
Julie		1	6	1394.42	49
Nora		39	73	1357.11	625
Barry		5	18	1308.20	88
Terry		7	33	1238.09	218
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
2007/04/05	7	Derek	6	Andrew	1	Post-Crawford.
2007/04/05	7	Matt	3	Julie	2
2007/04/12	11	Greg	8	Derek	9
2007/04/19	7	Ray	3	Julie	1

Ratings - 2007/04/14

Name		Record		Rating	Exp	Tournament Points Y-T-D
		W	L
Greg		162	74	1759.23	2198
Matt		67	40	1692.44	554
Andrew		13	6	1663.81	133
Karen		10	3	1611.11	67
Derek		112	130	1554.84	2232
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
2007/04/12	11	Greg	8	Derek	9

What to do?

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]