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Subject: Is this the most egrgious bug in shredder7.04 or something else

Author: Rupesh

Date: 19:28:48 05/31/03


Dear All,

I am reproducing an incredible game i saw on playchess server. It was an engine
to engine match. My(Black, Amitesh) program shredder 7.04 ( running on xeon 2.60
ghz dual, 64 MB Hash, 16 Mb table cache, shredder book) in the end had king left
and the white had a king and rook left. Guess what
Engines agreed to draw.

Before agreeing to draw, you may notice that shredder(white) actually failed to
mate a lone king with king and rook. Somebody please explain this ..I am getting
so frustrated with this program.

Anybody who is interested in computer chess should follow this game from MOVE
41.

I am not able to post the diagram as i currently could not figure out how to
doit here.

Ace of Chess,S (2605) - amitesh,S (2689) [D62]
Rated game, 5m + 2s Engine Room, 31.05.2003

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Nf3 0-0 6.e3 Nbd7 7.Qc2 c5 8.cxd5 Nxd5
9.Bxe7 Qxe7 10.Nxd5 exd5 11.Bd3 g6 12.dxc5 Nxc5 13.0-0 Bg4 14.Nd4 Rac8 15.Rac1
b6  0.04/11  15  16.Be2  0.09/12  18  Ne4  0.25/13  13  17.Qd3  0.25/13  0  Bxe2
 0.26/13  15  18.Nxe2  0.19/14  0  Qe5  0.23/13  6  19.Nd4  0.24/13  32  Qf6
0.30/12  22  20.f3  0.29/12  9  Nd6  0.29/13  5  21.b3  0.34/12  4  Rc5  0.20/12
 1  22.Rfd1  0.16/11  11  Re8  0.14/13  8  23.Qd2  0.18/10  0  a5  0.01/12  10
24.Rc2  0.03/11  13  Rxc2  -0.19/12  11  25.Nxc2  0.02/13  9  Nf5  -0.19/14  12
26.Nd4  -0.30/12  17  Nxd4  -0.21/13  9  27.Qxd4  -0.22/15  8  Qxd4  -0.22/15  1
 28.Rxd4  0.07/14  0  Rxe3  0.15/13  3  29.Rxd5  0.05/13  1  Rc3  0.15/13  8
30.h4  0.12/14  3  Rc6  0.18/13  9  31.Rb5  0.15/14  4  f5  0.13/14  13  32.Kh2
0.15/14  1  Kf7  0.18/15  13  33.g4  0.20/16  0  Rc2+  0.10/14  7  34.Kg3
0.13/15  9  fxg4  0.04/16  0  35.fxg4  0.12/16  9  Rxa2  0.02/16  0  36.Rxb6
0.04/15  8  a4  0.02/16  0  37.Rb7+  0.03/14  11  Ke6  0.01/16  14  38.bxa4
0.04/15  0  Ra3+  0.01/18  6  39.Kf4  0.05/17  0  Rxa4+  0.01/18  2  40.Kg5
0.05/19  10  h6+  0.01/23  0  41.Kxg6  0.11/19  11  Rxg4+  0.01/24  6  42.Kh5
0.13/20  0  Rxh4+  -0.01/34  6  43.Kxh4 Kd5  6.82/20  0  44.Kh5 Kc6  6.84/21  0
45.Rf7 Kd5  6.90/23  0  46.Kxh6 Ke6  6.94/23  0  47.Kg6 Ke5  7.45/21  0  48.Re7+
Kd6  7.52/20  0  49.Re4 Kc5  7.87/24  0  50.Kf6 Kd5  #22/24  0  51.Rg4 Kc6
#13/18  0  52.Ke6 Kc5  #3/5  0  53.Rf4 Kb6  #1/3  0  54.Kd6 Kb5  -#1/1  0
55.Kd5 Kb6  #0/1  0  56.Kd6 Kb5  -#1/1  0  57.Kd5 Kb6  #0/1  0  58.Re4 Kc7  #2/6
 0  59.Ke6 Kb6  #1/3  0  60.Rc4 Kb5  #0/1  0  61.Kd5 Kb6  -#2/1  0  62.Kd6 Kb5
-#3/1  0  63.Kd5 Kb6  -#2/1  0  64.Kd6 Kb5  -#3/1  0  65.Re4 Kb6  #0/1  0
66.Rd4 Kb5  -#1/1  0  67.Re4 Kb6  #0/1  0  68.Rd4 Kb5  -#1/1  0  69.Rg4 Kb6
#1/1  0  70.Rb4+ Ka5  -#1/3  0  71.Rg4 Kb5  #1/2  0  72.Kd5 Kb6  #2/3  0  73.Re4
Kc7  #2/3  0  74.Ke6 Kb6  #1/1  0  75.Rc4 Kb5  #0/1  0  76.Rd4 Kc5  #5/14  0
77.Ke5 Kc6  #4/7  0  78.Re4 Kc7  #3/5  0  79.Kd5 Kb6  #3/12  0  80.Rc4 Kb5  #1/1
 0  81.Rg4 Kb6  #2/3  0  82.Rc4 Kb5  #1/1  0  83.Rd4 Kb6  -#1/8  0  84.Rb4+ Kc7
#2/12  0  85.Kc5 Kd7  #1/1  0  86.Re4 Kc7  #0/1  0  87.Re7+ Kd8  -#1/1  0
88.Kd6 Kc8  -#3/1  0  89.Kc6 Kb8  -#2/1  0  90.Re4 Ka7  -#5/1  0  91.Ra4+ Kb8
-#6/1  0  92.Re4 Ka7  -#5/1  0  93.Ra4+ Kb8  -#6/1  0  94.Rd4 Ka7  -#3/1  0
95.Rc4 Ka8  #2/3  0  96.Rb4 0.00/99  5  ½-½

Amitesh




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