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Subject: Arena´s bug

Author: Pedro Gomes

Date: 09:22:31 12/22/04


This game, played in Demo mode with Arena GUI, was declared as black´s win
(0-1)and "Stalemate", at the same time.

1) White wasn´t in stalemate because it was black´s turn to play
2) the result 0-1 was correct, which means that "White resigned", not
"Stalemate"
3) "Stalemate" was announced on the screen and in PGN

[Event "Computer chess game"]
[Site "PG"]
[Date "2004.12.22"]
[Round "?"]
[White "Engine A"]
[Black "Engine B"]
[Result "0-1"]
[ECO "D27"]
[Opening "QGA"]
[Time "12:37:47"]
[Variation "Classical, 6...a6 7.a3"]
[TimeControl "1500+3"]
[Termination "normal"]
[PlyCount "129"]
[WhiteType "program"]
[BlackType "program"]

1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 dxc4 5.Bxc4 c5 6.a3 a6 7.O-O {+0.53/8 30} cxd4
8.Qxd4 {+0.24/10 31} Qxd4 {+0.02/16 37} 9.Nxd4 {+0.17/11 29} Bd7 {+0.10/15 57}
10.Nc3
{+0.17/9 32} Nc6 {+0.17/15 44} 11.Rd1 {+0.08/10 28} Nxd4 {+0.21/15 48} 12.Rxd4
{+0.06/11
28} Rc8 {+0.37/15 42} 13.Bb3 {-0.06/11 30} Bc5 {+0.30/15 66} 14.Rd1 {-0.21/11
27}
Bc6 {+0.41/15 34} 15.Na4 {-0.12/11 30} Ba7 {+0.30/14 30} 16.Bd2 {-0.15/12 26} b5
{+0.30/14 23} 17.Rac1 {-0.02/11 25} bxa4 {+0.21/15 74} 18.Rxc6 {+0.47/13 25}
Rxc6
{+0.15/17 44} 19.Bxa4 {+0.44/14 25} Kd7 {+0.28/16 50} 20.Ba5+ {+0.29/11 24} Nd5
{+0.17/17
26} 21.e4 {+0.14/13 24} Kd6 {+0.14/16 77} 22.Bxc6 {+0.15/12 26} Kxc6 {+0.25/15
20}
23.exd5+ {+0.18/10 8} exd5 {+0.34/16 63} 24.Bc3 {+0.06/11 23} f6 {+0.46/15 18}
25.Rc1
{+0.09/10 23} Kd7 {+0.42/15 19} 26.Kf1 {+0.04/11 22} Rb8 {+0.38/15 59} 27.b4
{+0.01/11
22} Re8 {+0.36/14 16} 28.h4 {0.00/11 22} Re4 {+0.47/15 42} 29.g3 {-0.07/12 21}
Bb8
{+0.45/15 39} 30.Rd1 {+0.10/11 21} Ke6 {+0.28/14 13} 31.Rd4 {+0.08/11 41} Rxd4
{+0.33/17
34} 32.Bxd4 {-0.01/12 19} Kf5 {+0.51/18 18} 33.a4 {-0.05/13 19} Ke4 {+0.29/18
22}
34.Bc5 {0.00/13 19} d4 {+0.37/17 14} 35.b5 {-0.15/13 20} axb5 {+0.17/16 11}
36.axb5
{-0.06/13 19} Kd5 {+0.06/16 12} 37.Bf8 {-0.09/13 18} Bc7 {+0.88/17 13} 38.Bxg7
{-0.21/14
18} f5 {0.00/18 13} 39.Ke2 {-0.21/13 18} Kc4 {0.00/20 18} 40.Bh6 {-0.27/12 17}
d3+
{+1.21/17 10} 41.Kd2 {-0.23/13 17} Ba5+ {+1.21/20 12} 42.Ke3 {-0.54/14 16} Kc3
{+2.35/16
11} 43.Kf3 {-0.24/12 16} Bc7 {+1.81/13 10} 44.Be3 {-0.54/12 16} Kc2 {+1.55/18
33}
45.g4 {-0.20/13 31} f4 {+1.75/15 17} 46.b6 {-0.33/13 15} Bxb6 {+3.02/17 38}
47.Bxf4
{-0.49/14 33} Ba5 {+3.27/17 43} 48.Ke4 {-2.88/14 103} Bd2 {+3.37/18 12} 49.Bc7
{-4.68/14
13} Bc1 {+7.44/17 8} 50.Ba5 {-5.10/14 26} Bb2 {+8.37/15 80} 51.Kf5 {-6.38/14 64}
Bc3 {+9.25/15 10} 52.Bxc3 {-6.30/13 11} Kxc3 {+9.35/13 6} 53.Kg5 {-6.30/11 13}
d2
{+9.95/14 12} 54.Kh6 {-6.60/11 10} d1=Q {+9.90/14 7} 55.g5 {-6.93/11 22} Qg4
{+10.34/11
6} 56.h5 {-6.69/9 12} Kd4 {+10.84/10 14} 57.f3 {-8.21/9 16} Qf4 {+10.92/10 6}
58.Kxh7 {-8.51/10 31} Qxg5 {+11.10/10 5} 59.f4 {-M6/10 9} Qxh5+ {0.00/9 1}
60.Kg7
{-8.51/10 9} Qf5 61.Kh6 {-M4/11 9} Qf6+ 62.Kh7 {-M7/9 9} Ke4 {+M6/7} 63.Kg8
{-M3/12 9}
Kf5 64.Kh7 {0.00/5} Qg6+ 65.Kh8 {0.00/5}  {Stalemate} 0-1



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