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Subject: Re: Ed Trice ... the perft 3 on your site is wrong

Author: Michel Langeveld

Date: 02:19:13 01/09/04

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On January 09, 2004 at 04:56:51, Michel Langeveld wrote:

>http://www.gothicchess.org/perft.txt
>
>At least the following is illegal:
>
>Af3  Af6  f4
>
>Maybe the following is correct:
>
>perft 1
>total perft = 28
>
>perft 2
>total perft = 784
>
>perft 3
>total perft = 25038
>
>perft 4
>total perft = 802134
>
>tscp> perft 5
>total perft = 28343582
>
>Here is also something funny:
>
>1 38 0 29 e2e4
>2 -10 0 180 e2e4 e7e5
>3 22 1 2552 e2e4 e7e5 b1c3
>4 6 5 9411 e2e4 e7e5 f2f4 b8c6
>5 38 48 93600 f2f4 i8h6 b1c3 f7f5 e2e4
>6 6 386 708071 e2e4 i8h6 b1c3 f7f5 f2f4 b8c6
>7 37 3138 5788855 f2f4 d7d6 d2d4 f7f5 b1c3 c8e6 i1h3

Fixed a bug:

perft 1
total perft = 28
perft 2
total perft = 784
perft 3
total perft = 25283
perft 4
total perft = 817316
perft 5
total perft = 29239788

I saw this because e4 e5 f4? is strange since it gives away a pawn.

Here the fixed version:

1 38 1 29 e2e4
2 -10 1 169 e2e4 e7e5
3 22 2 2555 e2e4 e7e5 b1c3
4 -10 7 15275 e2e4 e7e5 b1c3 i8h6
5 38 45 109134 e2e4 e7e5 i1h3 i8h6 f2f4
6 -10 449 1033216 e2e4 e7e5 i1h3 i8h6 f2f4 f7f5
7 14 3840 9004868 i1h3 e7e5 f2f4 e5f4 h3f4 f7f5 b1c3




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