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Shatranj perfts
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Paul Byrne



Joined: 13 Jun 2011
Posts: 44
PostPost subject: Shatranj perfts    Posted: Fri Feb 24, 2012 10:15 pm Reply to topic Reply with quote
What to do when you're too lazy to turn your core routines into an actual engine?
Compute more perfts of course...

Following is a table of unique positions and perfts for Shatranj. These match the numbers
I got years ago with my old shatranj engine, which is reassuring. It would be more convincing
to have independent verification of some perfts though... does anyone know of a publically
available perft-capable Shatranj engine I can use for comparison's sake? Doesn't have to use
hash tables or anything: brute-forcing the first few ply would suffice. Thanks!

Code:
ply        unique                    perft
 1             16                       16
 2            256                      256
 3          2,304                    4,176
 4         20,736                   68,122
 5        145,266                1,164,248
 6      1,021,749               19,864,709
 7      6,271,768              357,218,656
 8     38,721,595            6,408,026,890
 9    218,347,985          120,750,846,281
10  1,241,703,484        2,269,622,343,812
11  6,624,556,236       44,585,818,929,451
12                     873,869,476,176,146
13                  17,808,138,061,220,658
14                 362,223,142,398,591,074
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Display posts from previous:   
Subject Author Date/Time
Shatranj perfts Paul Byrne Fri Feb 24, 2012 10:15 pm
      Re: Shatranj perfts Daniel Shawul Fri Feb 24, 2012 11:41 pm
            Re: Shatranj perfts Daniel Shawul Sat Feb 25, 2012 12:03 am
      Re: Shatranj perfts Evert Glebbeek Sat Feb 25, 2012 6:17 am
      Re: Shatranj perfts Paul Byrne Sat Feb 25, 2012 9:42 pm
      Re: Shatranj perfts H.G.Muller Sat Feb 25, 2012 10:17 pm
            Re: Shatranj perfts Paul Byrne Sun Feb 26, 2012 1:14 am
      Re: Shatranj perfts Paul Byrne Wed Feb 29, 2012 12:30 am
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