Archive for April, 2007

Attendance Warning

April 29, 2007

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).

Advertisements

Ratings – 2007/04/28

April 29, 2007
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

April 21, 2007
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

April 18, 2007
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?

April 15, 2007

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  ( +0.698)
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]