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Subject: BUG in Fritz 7 Engine?

Author: Eduard Nemeth

Date: 19:09:44 05/18/02


Yesterday I played this game on my P600 against F7 (date 11.01.02):


[Event "Blitz30'"]
[Site "?"]
[Date "2002.??.??"]
[Round "?"]
[White "Fritz 7"]
[Black "Nemeth,Eduard"]
[ECO "C57"]
[Result "0-1"]

1. e4 {0} e5 {3} 2. Nf3 {0} Nc6 {2} 3. Bc4 {0} Nf6 {2}
4. Ng5 {0} d5 {3} 5. exd5 {0} Bg4 {2} 6. Nxf7 {0.94/13 77}
Qc8 {6} 7. f3 {1.94/13 62} Nd4 {10} 8. Nxh8 {4.03/12 32}
Bxf3 {5} 9. Bb5+ {3.88/12 40} c6 {13} 10. gxf3 {4.09/12 61}
Qh3 {7} 11. dxc6 {3.88/11 49} O-O-O {11} 12. cxb7+ {2.75/10
59} Kb8 {3} 13. Nf7 {2.72/11 26} Qh4+ {47} 14. Kf1 {5.28/9
4} Qh3+ {11} 15. Kf2 {0.00/12 34} Be7 {43} 16. Bc6 {3.63/10
109} Ng4+ {67} 17. fxg4 {3.72/10 30} Rf8 {30} 18. Re1
{0.00/10 8} Bc5 {53} 19. Be8 {-0.44/11 0} e4 {65} 20. Rxe4
{-3.22/12 0} Qxh2+ {11} 21. Kf1 {-5.28/12 38} Qh1+ {16}
22. Kf2 {-5.28/11 0} Qxd1 {13} 23. Re3 {-6.16/11 81} Nxc2
{5} 24. Nc3 {-8.00/11 18} Bxe3+ {8} 25. dxe3 {-9.03/12 46}
Qe1+ {5} 26. Kf3 {-9.31/12 78} Nxa1 {9} 27. Nb5 {-10.06/11
15} 0-1

ok. I won then this variation is my spezial-killer :))

But today I played 2 games , on Lever 60' and Tourn-level:

See this:


[Event "Blitz=60'"]
[Site "?"]
[Date "2002.??.??"]
[Round "?"]
[White "Fritz 7"]
[Black "Nemeth,Eduard"]
[ECO "C57"]
[Result "1/2-1/2"]

1. Nf3 {0} Nc6 {3} 2. e4 {0} e5 {1} 3. Bc4 {0} Nf6 {2}
4. Ng5 {0} d5 {1} 5. exd5 {0} Bg4 {8} 6. Nxf7 {0.94/13 76}
Qc8 {4} 7. f3 {1.97/14 141} Nd4 {11} 8. Nxh8 {4.09/13 87}
Bxf3 {4} 9. gxf3 {3.88/12 259} Qh3 {8} 10. Rf1 {3.28/11
136} Qh4+ {19} 11. Rf2 {3.03/12 0} Bc5 {15} 12. Kf1
{2.09/12 116} Qh3+ {44} 13. Ke1 {1.84/12 23} Qh4 {38}
14. Kf1 {2.13/12 87} Qh3+ {20} 15. Ke1 {1.75/13 67} Qh4
{13} 16. Kf1 {2.13/12 60} 1/2-1/2

Fritz 7 played with a score +2.13 for a draw!
Why this????????????

In time I played now a game on Tourn-Level 120':

The game is not to belive but real:


[Event "120'/40+60'20+30'"]
[Site "?"]
[Date "2002.??.??"]
[Round "?"]
[White "Fritz 7,P600,128Mb"]
[Black "Nemeth,Eduard"]
[ECO "C57"]
[Result "0-1"]

1. e4 {0} e5 {2} 2. Nf3 {0} Nc6 {2} 3. Bc4 {0} Nf6 {3}
4. Ng5 {0} d5 {2} 5. exd5 {0} Bg4 {4} 6. Nxf7 {1.13/14 181}
Qc8 {5} 7. f3 {1.97/14 162} Nd4 {5} 8. Nxh8 {4.09/13 94}
Bxf3 {5} 9. Bb5+ {3.63/13 491} c6 {45} 10. gxf3 {3.84/13
163} Qh3 {5} 11. dxc6 {2.75/12 353} O-O-O {4} 12. cxb7+
{2.72/12 161} Kb8 {3} 13. Nf7 {2.34/12 362} Qh4+ {9}
14. Kf1 {5.28/9 4} Qh3+ {5} 15. Kf2 {0.00/14 345} Ne4+ {9}
16. fxe4 {1.59/12 235} Be7 {10} 17. d3 {-1.00/13 654} Rf8
{42} 18. Bd7 {-4.75/11 221} Rxf7+ {115} 19. Bf5 {-#12/12
29} Nxf5 {46} 20. Qg1 {-#11/10 46} Qh4+ {9} 21. Ke2 {-#9/9
9} Nd4+ {4} 22. Qxd4 {-#7/7 4} Qg4+ {6} 23. Kd2 {-#6/7 6}
exd4 {54} 24. Nc3 {-#5/5 54} Bg5+ {13} 25. Ke1 {-#4/4 13}
Qh4+ {8} 26. Kd1 {-#6/8 1} dxc3 {11} 27. bxc3 {-#5/7 11}
Qg4+ {4} 28. Ke1 {-#4/5 0} Bh4+ {10} 29. Kd2 {-#3/4 10}
Qg2+ {6} 30. Kd1 {-#2/3 6} Qxh1+ {18} 31. Kd2 {-#1/2 18}
Qe1# {3} 0-1

Position after move 17:

[D]1k3r2/pP2bNpp/8/1B2p3/3nP3/3P3q/PPP2K1P/RNBQ3R w - -

First: after move 16...Bd7 Fritz 7 would play first Ne5, then Rf1 then he
play 17. d3. And the Score? After 17.d3 and _10 minutes-thinking_ (!) only -1
against white???

After move 17...Rf8 Score was then with 18.Bd7 -4.75, and after this Fritz 7 see
 a mate!

Eduard




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Last modified: Thu, 15 Apr 21 08:11:13 -0700

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