Newsletter for 27 January 2004
The Gang's All Here
On Tuesday, 27 January 2004, the Backgammon Club of San Diego met, and had the best tournament of
the year. Once reentries came through, we had filled up a 16-player bracket.
Tournament News
11 people entered an 16-player bracket on Tuesday night, with the following results:
- First place / Second place: Bruce Haight & Cyrus Mobedshahi (split)
- Third place: Jason Lee
Starting next week, the club will be carefully following a preset schedule that mandates the use of
clocks for certain late-starting matches. If you come, be prepared to play some of your matches using
a clock.
Current Master Points Standings
By tying for the win in the tournament, Bruce moves into sole possession of the lead in the Master
Points race:
1. Bruce Haight 15
2. Jason Lee 10
3. Marcia Karen 9
4. Sho Sengoku 8
5. Cyrus Mobedshahi 6
6. Adrian Costa 6
7. Fred Kamgar 1
8. Sam Mehri 1
Remember that the point leader at the end of the year will be named
the BCSD Player of the Year, and the top 16 in the Point Race will be
invited to the 2004 BCSD Tournament of Champions, to be held in early 2005.
Problem of the Week
Here's a cute position from Danny Kleinman's book Vision Laughs at Counting:
Money game. Black on roll. Cube action?
Pip counts: White 8, Black 7
What's the right play here?
Last Week's Problem of the Week
Last week we considered a position from a late chouette that created some interesting action.
At the table, Black (in the box) held three 2-cubes, and redoubled all.
Two people took, and the bold soul sitting in the leather Captain's seat beavered to 8, which was accepted.
Money game. Black on roll. Cube action?
Pip counts: White 57, Black 154
Did anybody do the right thing?
It's far too difficult for Black to contain that lone White checker -- furthermore, White still has
some reasonable gammon chances -- this seems like a take at the board, and in fact, it turns out
that GNU says that the beaver is right!
|
| Rollout cubeless equity | -0.110 | |
| Cubeful equities: |
| 1. | No double | +0.080 | |
| 2. | Double, pass | +1.000 | +0.920 |
| 3. | Double, take | -0.468 | -0.548 |
| Proper cube action: | No redouble, beaver (37.3%) |
| Rollout details |
|---|
| | Win | W g | W bg | | Lose | L g | L bg | Cubeless | Cubeful |
| Player Black owns 2-cube | 0.514 | 0.057 | 0.001 | - | 0.486 | 0.194 | 0.002 | -0.110 | +0.080 |
| Standard error | 0.001 | 0.000 | 0.000 | - | 0.001 | 0.001 | 0.000 | 0.002 | 0.002 |
| Player White owns 4-cube | 0.516 | 0.060 | 0.001 | - | 0.484 | 0.193 | 0.002 | -0.204 | -0.468 |
| Standard error | 0.001 | 0.000 | 0.000 | - | 0.001 | 0.001 | 0.000 | 0.004 | 0.005 |
|
| Truncated cubeful rollout (depth 11) with var.redn. |
| 7776 games, Mersenne Twister dice gen. with seed 959585856 and quasi-random dice |
| Play: 0-ply cubeful [expert] |
| Cube: 0-ply cubeful [expert] |
See you next week! Keep tossing those cubes,
J. Lee
Output generated
by GNU Backgammon 0.14-devel (HTML Export version 1.123)
