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Subject: Re: an interesting bug in my move generator

Author: Dann Corbit

Date: 16:30:50 01/01/02

Go up one level in this thread


On January 01, 2002 at 17:48:46, Dann Corbit wrote:

>On January 01, 2002 at 16:02:12, Heiner Marxen wrote:
>
>>On January 01, 2002 at 14:46:20, Uri Blass wrote:
>>
>>>On January 01, 2002 at 14:30:46, David Rasmussen wrote:
>>>
>>>>On January 01, 2002 at 13:25:44, Heiner Marxen wrote:
>>>>
>>>>>
>>>>>Chest agrees with your numbers:
>>>>>
>>>>>FEN: 1b5k/7P/p1p2np1/2P2p2/PP3P2/4RQ1R/q2r3P/6K1 w - -
>>>>>Counting width of legal tree, 5 plies deep...
>>>>>Time (user) = 9.84 sec
>>>>>dep          #nodes     quot        sum nodes
>>>>>  0               1 [  0.000]               1
>>>>>  1              31 [ 31.000]              32
>>>>>  2            1213 [ 39.129]            1245
>>>>>  3           35927 [ 29.618]           37172
>>>>>  4         1353197 [ 37.665]         1390369
>>>>>  5        40590029 [ 29.996]        41980398
>>>>>
>>>>>(Done on a K7/600)
>>>>>
>>>>>Cheers,
>>>>>Heiner
>>>>
>>>>Chezzz agrees too.
>>>>
>>>>/David
>>>
>>>my program says perft 6=1483136098 after 207.549 seconds on p800
>>>
>>>Uri
>>
>>Chest agrees again:
>>
>>  6      1483136098 [ 36.539]      1525116496
>>Time (user) = 314.31 sec (5.2 min)
>>
>>Your speed is not bad, at least significantly faster than Chest.  And since
>>we both generate strictly legal moves, our times are comparable.
>>Congratulations!
>
>I don't understand your output.
>
>Here is Beowulf output:
>[1]W > perft 6
>Progress : ....................
>Total: 119060324 Moves
>48.25 Seconds
>
>Here is Yace output:
>white ( 1): perft 6
> 1:              20
> 2:             400
> 3:            8902
> 4:          197281
> 5:         4865609
> 6:       119060324
>Used 36.508 s
>
>And Pepito:
>Pepito> perft 6
>
>Time spent: 40.16
>Paths searched: 119060324
>Pepito>
>
>What exactly are you measuring?

ACK!!  Nevermind.  I just went upthread and saw what everyone was talking about.
Reminds me of a test I took once, which said, "Read everything before doing
anything."
The last thing (at the end of the test) said "Ignore all the other instructions,
put your pencil down, and sit quietly."
Intervening instructions were things that got more and more bizarre, but
included such gems as "Shout your name as loud as you possibly can."



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