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Subject: Re: Perft -- Correction

Author: Stuart Cracraft

Date: 21:26:39 02/24/06

Go up one level in this thread


On February 23, 2006 at 09:56:47, Roman Hartmann wrote:

>On February 23, 2006 at 09:51:06, Charles Roberson wrote:
>
>>
>>   7k/8/8/8/1p6/8/PP6/7K w - - 0 0
>>
>>    This produces 6 moves for the first ply.
>>     a4, a3, b3, Kg1, Kg2, Kh2
>
>I understand you count the total nodes. First the total nodes and below only the
> nodes at the leaves.
>
>Perft (1): 6 nodes, Time: 0.000 s
>Perft (2): 2 total nodes: 31, Time: 0.000 s
>Perft (2): 3 total nodes: 207, Time: 0.000 s
>Perft (2): 4 total nodes: 1288, Time: 0.000 s
>Perft (2): 5 total nodes: 9767, Time: 0.000 s
>Perft (2): 6 total nodes: 66995, Time: 0.020 s
>Perft (2): 7 total nodes: 531785, Time: 0.151 s
>Perft (2): 8 total nodes: 3852881, Time: 1.151 s
>Perft (2): 9 total nodes: 31037978, Time: 8.863 s
>
>classic perft
>
>Perft (1): 6 nodes, Time: 0.000 s
>Perft (2): 25 nodes, Time: 0.000 s
>Perft (3): 176 nodes, Time: 0.000 s
>Perft (4): 1081 nodes, Time: 0.000 s
>Perft (5): 8479 nodes, Time: 0.010 s
>Perft (6): 57228 nodes, Time: 0.020 s
>Perft (7): 464790 nodes, Time: 0.150 s
>Perft (8): 3321096 nodes, Time: 1.142 s
>Perft (9): 27185097 nodes, Time: 8.873 s
>
>Roman

teedee agrees:

.bd
-- ** -- ** -- ** -- BK
** -- ** -- ** -- ** --
-- ** -- ** -- ** -- **
** -- ** -- ** -- ** --
-- BP -- ** -- ** -- **
** -- ** -- ** -- ** --
WP WP -- ** -- ** -- **
** -- ** -- ** -- ** WK
mv 1 stage 11, white to move, computer plays white
hash=6c146a7d8a1be3eb
pawnhash=7d00d139e9182ef2
0 0 0 0 0 0
.perft
perft(1) nodes visited = 6
perft(2) nodes visited = 25
perft(3) nodes visited = 176
perft(4) nodes visited = 1081
perft(5) nodes visited = 8479
perft(6) nodes visited = 57228
perft(7) nodes visited = 464790
perft(8) nodes visited = 3321096
perft(9) nodes visited = 27185097



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