Re: [Bug-gnubg] Ply analysis does not give equal GWC and MWC in 1 point match.

[motiv4u]

>
> On Sun, Feb 1, 2009 at 12:26 PM, bob koca <address@hidden> wrote:
>>    Very latest build being used. Gets down to a symmetric medium length race
>> in one point match.
>>
>> GNUbg ID is  2+4OAADb7gYEAA:cAknAAAAAAAA
>>
>>   It is 1 point match so game win chance equals MWC.  0-ply and RO report
>> that correctly but
>> 1, 2, 3, and 4 ply are crazy.
>>
>>
>>     1. Rollout          13/6                         MWC:  36.99590%
>>        0.369959 0.000000 0.000000 - 0.630041 0.000000 0.000000 CL  36.99590%
>>       [0.000073 0.000000 0.000000 - 0.000073 0.000000 0.000000 CL
>> 0.00733%]
>>         Full cubeless rollout with var.redn.
>>         1296 games, Mersenne Twister dice gen. with seed 1000000 and
>> quasi-random dice
>>         Play: 0-ply cubeful
>>         Cube: 2-ply cubeful prune
>>     2. Cubeful 4-ply    13/7 4/3                     MWC:  94.59189% (
>> 57.59599%)
>>        0.304787 0.000000 0.000000 - 0.695213 0.000000 0.000000
>>         4-ply cubeful prune
>>     3. Cubeful 3-ply    13/7 3/2                     MWC:  11.25431%
>> (-25.74159%)
>>        0.335456 0.000000 0.000000 - 0.664544 0.000000 0.000000
>>         3-ply cubeful prune [grandmaster]
>>     4. Cubeful 2-ply    13/7 5/4                     MWC:  99.26514% (
>> 62.26924%)
>>        0.335899 0.000000 0.000000 - 0.664101 0.000000 0.000000
>>         2-ply cubeful prune [world class]
>>     5. Cubeful 1-ply    13/7 2/1                     MWC:   0.12791%
>> (-36.86799%)
>>        0.328583 0.000000 0.000000 - 0.671417 0.000000 0.000000
>>         1-ply cubeful prune
>>     6. Cubeful 0-ply    13/7 6/5                     MWC:  33.08157% (
>> -3.91434%)
>>        0.330816 0.000000 0.000000 - 0.669184 0.000000 0.000000
>>         0-ply cubeful prune [expert]
>>
>>
>>
>> Bob Koca

> That is really weird. I see no problems here on linux, and I cannot
> come up with any recent changes that could trigger this. I'll try to
> reproduce with the windows build later.
>
> Christian.

I get this with the home made build (following Jon's directives):

    1. Rollout          13/6                         MWC:  36,98%
       0,370 0,000 0,000 - 0,630 0,000 0,000 CL  36,98% CF  36,98%
      [0,000 0,000 0,000 - 0,000 0,000 0,000 CL   0,01% CF   0,01%]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 816392213 and
quasi-random dice
        Play: 0-ply cubeful prune [expert]
        Cube: 2-ply cubeful prune [world class]
    2. Cubeful 4-ply    13/7 4/3                     MWC:  32,80% ( -4,18%)
       0,328 0,000 0,000 - 0,672 0,000 0,000
        4-ply cubeful prune
    3. Cubeful 3-ply    13/7 3/2                     MWC:  32,22% ( -4,77%)
       0,322 0,000 0,000 - 0,678 0,000 0,000
        3-ply cubeful prune [grandmaster]
    4. Cubeful 2-ply    13/7 5/4                     MWC:  33,44% ( -3,54%)
       0,334 0,000 0,000 - 0,666 0,000 0,000
        2-ply cubeful prune [world class]
    5. Cubeful 1-ply    13/7 2/1                     MWC:  31,75% ( -5,23%)
       0,318 0,000 0,000 - 0,682 0,000 0,000
        1-ply cubeful prune
    6. Cubeful 0-ply    13/7 6/5                     MWC:  33,08% ( -3,90%)
       0,331 0,000 0,000 - 0,669 0,000 0,000
        0-ply cubeful prune [expert]

But indeed, the 20090127fixed windows build shows bob's crazy result :

    1. Rollout          13/6                         MWC:  35,34%
       0,363 0,000 0,000 - 0,637 0,000 0,000 CL  36,34% CF  35,34%
      [0,002 0,000 0,000 - 0,002 0,000 0,000 CL   0,16% CF   1,33%]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 815985927 and
quasi-random dice
        Play: 0-ply cubeful prune [expert]
        Cube: 2-ply cubeful prune [world class]
    2. Cubeful 4-ply    13/7 4/3                     MWC:  94,01% ( 58,67%)
       0,306 0,000 0,000 - 0,694 0,000 0,000
        4-ply cubeful prune
    3. Cubeful 3-ply    13/7 3/2                     MWC:  14,21% (-21,13%)
       0,340 0,000 0,000 - 0,660 0,000 0,000
        3-ply cubeful prune [grandmaster]
    4. Cubeful 2-ply    13/7 5/4                     MWC:  99,27% ( 63,93%)
       0,327 0,000 0,000 - 0,673 0,000 0,000
        2-ply cubeful prune [world class]
    5. Cubeful 1-ply    13/7 2/1                     MWC:   0,12% (-35,22%)
       0,330 0,000 0,000 - 0,670 0,000 0,000
        1-ply cubeful prune
    6. Cubeful 0-ply    13/7 6/5                     MWC:  33,20% ( -2,13%)
       0,332 0,000 0,000 - 0,668 0,000 0,000
        0-ply cubeful prune [expert]


N.