As I have previously said, there is often a problem with this when rolling out
several moves with this option. I am still encountering it using the
multithreaded code in the 20090817 Windows version.
1. A move that has come back within the set JSDs only sometimes not always
restarts rolling.
2. A move that has gone way beyond the set JSDs sometimes continues to roll.
3. The whole rollout can stop with some rolls neither rolled to maximum number
of trials nor outside the set JSDs.
I think these problems happen generally when the plays don't fall out of
contention from the bottom of the list up. Stopping and restarting the rollout
with them reordered gets the right moves rolling again.
The fourth move in the rollout below continued rolling another 1000 games or
more while above the 3.1 JSD limit set.
GNU Backgammon Position ID: hucZAxDYzmDABg
Match ID : 8AmmAAAAIAAA
+13-14-15-16-17-18------19-20-21-22-23-24-+ O: gnubg
| X O O | | O X X O | 0 points
| X O O | | O X X O |
| O | | O |
| O | | O |
| | | |
v| |BAR| | 5 point match (Cube: 1)
| | | |
| | | |
| | | X |
| O X | | X X X | Rolled 41
| O X | | X X X O | 4 points
+12-11-10--9--8--7-------6--5--4--3--2--1-+ X: Neil
1. Rollout 20/16 6/5 Eq.: +0.047
0.532 0.192 0.027 - 0.468 0.153 0.005 CL +0.047 CF +0.047
[0.002 0.004 0.002 - 0.002 0.002 0.000 CL 0.003 CF 0.003]
Full cubeful rollout with var.redn.
2592 games, Mersenne Twister dice gen. with seed 359697340 and
quasi-random dice
Stop when best play is enough JSDs ahead: limit 3.1 (min. 217 games)
Play: 0-ply cubeful [expert]
Cube: 0-ply cubeful [expert]
2. Rollout 21/16 Eq.: +0.030 ( -0.017)
0.523 0.177 0.021 - 0.477 0.153 0.004 CL +0.030 CF +0.030
[0.002 0.004 0.002 - 0.002 0.002 0.000 CL 0.003 CF 0.003]
Full cubeful rollout with var.redn.
2331 games, Mersenne Twister dice gen. with seed 359697340 and
quasi-random dice
Stop when best play is enough JSDs ahead: limit 3.1 (min. 217 games)
Play: 0-ply cubeful [expert]
Cube: 0-ply cubeful [expert]
3. Rollout 8/7 6/2* Eq.: +0.020 ( -0.027)
0.518 0.179 0.017 - 0.482 0.154 0.003 CL +0.020 CF +0.020
[0.002 0.005 0.002 - 0.002 0.002 0.001 CL 0.005 CF 0.005]
Full cubeful rollout with var.redn.
1486 games, Mersenne Twister dice gen. with seed 359697340 and
quasi-random dice
Stop when best play is enough JSDs ahead: limit 3.1 (min. 217 games)
Play: 0-ply cubeful [expert]
Cube: 0-ply cubeful [expert]
4. Rollout 13/9 6/5 Eq.: +0.017 ( -0.030)
0.515 0.172 0.016 - 0.485 0.132 0.003 CL +0.017 CF +0.017
[0.002 0.004 0.002 - 0.002 0.001 0.000 CL 0.003 CF 0.003]
Full cubeful rollout with var.redn.
2592 games, Mersenne Twister dice gen. with seed 359697340 and
quasi-random dice
Stop when best play is enough JSDs ahead: limit 3.1 (min. 217 games)
Play: 0-ply cubeful [expert]
Cube: 0-ply cubeful [expert]
5. Rollout 6/2*/1 Eq.: +0.010 ( -0.038)
0.512 0.177 0.014 - 0.488 0.143 0.004 CL +0.010 CF +0.010
[0.004 0.010 0.004 - 0.004 0.004 0.001 CL 0.008 CF 0.008]
Full cubeful rollout with var.redn.
426 games, Mersenne Twister dice gen. with seed 359697340 and
quasi-random dice
Stop when best play is enough JSDs ahead: limit 3.1 (min. 217 games)
Play: 0-ply cubeful [expert]
Cube: 0-ply cubeful [expert]
6. Rollout 13/8 Eq.: +0.006 ( -0.041)
0.509 0.180 0.012 - 0.491 0.118 0.003 CL +0.006 CF +0.006
[0.004 0.010 0.003 - 0.004 0.003 0.001 CL 0.008 CF 0.008]
Full cubeful rollout with var.redn.
355 games, Mersenne Twister dice gen. with seed 359697340 and
quasi-random dice
Stop when best play is enough JSDs ahead: limit 3.1 (min. 217 games)
Play: 0-ply cubeful [expert]
Cube: 0-ply cubeful [expert]
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