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Subject: Suckering Fritz 8 with material offer...

Author: Roy Brunjes

Date: 09:50:40 02/16/03


As advanced as modern chess playing software is, programs can still be led into
dangerous positions with their kingside completely undeveloped when the smell of
a material win is too great for their eval function to avoid...

Of course Eduard Nemeth is well known on this board for doing this against lots
of programs.  Here the damage is done by another program however:


[Event "Blitz:15'+10""]
[Site "MyTown"]
[Date "2003.02.16"]
[Round "?"]
[White "Fritz 8, 500 MHz"]
[Black "CM9000 Junior, 700 MHz"]
[Result "0-1"]
[ECO "E81"]
[PlyCount "86"]
[TimeControl "900+10"]

{64MB, Fritz8.ctg, Pentium III 500MHz
} 1. d4 {0} Nf6 {5} 2. c4 {0} g6 {3} 3.
Nc3 {0} Bg7 {3} 4. e4 {0} d6 {4} 5. f3 {0} O-O {4} 6. Be3 {0} c5 {42} 7. dxc5 {
0} dxc5 {4} 8. e5 {0} Nfd7 {4} 9. f4 {0} f6 {5} 10. exf6 {0} Rxf6 {4} 11. Qd5+
{31} Kh8 {19} 12. Ne4 {82} Ra6 {4} 13. Ng5 {31} e6 {39} 14. Nf7+ {40} Kg8 {4}
15. Nxd8 {37} exd5 {2} 16. cxd5 {30} Nb6 {5} 17. Bxc5 {46} Bxb2 {38} 18. Rb1 {0
} Bc3+ {51} 19. Kd1 {31} Rxa2 {19} 20. Bxb6 {7} axb6 {39} 21. Nf3 {30} Bf5 {55}
22. Rc1 {0} Bb2 {34} 23. Bc4 {3} Bxc1 {26} 24. Bxa2 {2} Rxa2 {30} 25. Re1 {11}
Bxf4 {22} 26. Re8+ {51} Kg7 {3} 27. Ne6+ {28} Bxe6 {22} 28. dxe6 {0} Nc6 {34}
29. e7 {31} Kf7 {5} 30. Rf8+ {35} Kxe7 {4} 31. Rxf4 {16} Rxg2 {57} 32. Re4+ {0}
Kd6 {10} 33. Re2 {39} Rxe2 {36} 34. Kxe2 {0} Kd5 {26} 35. Ng5 {33} h6 {3} 36.
Nf7 {21} b5 {18} 37. Nxh6 {22} Ne5 {7} 38. Kd2 {22} Ke6 {28} 39. Kc3 {39} Kf6 {
25} 40. h4 {0} Kg7 {27} 41. h5 {0} Kxh6 {29} 42. hxg6 {27} Nc6 {7} 43. Kd3 {30}
b4 {28} 0-1

With 16 ... Nb6, Black offers up some material that White cannot pass up. White
munches on the pawn and later chokes on Black's piece activity while the white
king gets left in the center.  Even winning the exchange with 17. Bxa6 does not
seem good to me:  17. Bxa6 Nxa6 18. Nf3 Nxd5 and the White King must pass on
castling and protect the bishop with 19. Kf2.  And of course the N on d8 is
toast now that the d5 pawn is gone.

I think that perhaps 17. Nf3 is the best course of action to get some
development and to move closer towards castling.

I thought the Knight trap played by CM9000 Junior was also pretty nice.  With 36
... b5 (ignoring the threat of Nxh6 because of ... Ne5 confining the White
Knight and allowing the Black King to stroll over and pick it off.  I'm sure
it's not a real complex idea, but I'm not that strong a player so it seemed nice
to me.

Roy








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