Author: John Merlino
Date: 11:43:41 02/16/03
Go up one level in this thread
On February 16, 2003 at 12:50:40, Roy Brunjes wrote:
>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
Interesting game. It seems that Fritz might have gotten itself into a bad
position right from the opening, choosing 8.e5, and perhaps even earlier with
7.dxc5. Statistically speaking, these are not the best choices, so I wonder if
they came from Fritz's book or not. According to the CM9000 database, 7.dxc5 has
a 44% scoring chance for White (+36 =64 -54), compared to 7.Nge2 (54% -- +90 =69
-70). Then on the eighth move, Fritz seems to have chosen the worst move. 8.e5
has a 37% scoring chance (+3 =9 -8), whereas at least Qxd8 is more common AND
better (45% -- +30 =55 -42).
As for White's 17th move, CM9000 agrees that Nf3 is probably best, but still not
great, and it takes a while (on my P3-733) to see it:
Time Depth Score Positions Moves
0:00 1/3 1.32 791 17.Bxa6 Nxa6 18.O-O-O Nb4 19.Bxc5
N6xd5 20.Bxb4 Nxb4
0:00 1/4 0.92 2780 17.Bxa6 Nxa6 18.O-O-O Bxb2+ 19.Kxb2
Nc4+ 20.Kb1 Nxe3
0:00 1/5 0.54 15332 17.Bxa6 Nxa6 18.Rd1 Nc4 19.Bc1
Nxb2 20.Bxb2 Bxb2
0:00 1/6 0.08 37106 17.Bxa6 Nxa6 18.Rd1 Bg4 19.Nxb7
Bxd1 20.Kxd1 Nxd5 21.Bxc5 Nxc5
22.Nxc5 Bxb2
0:01 1/7 0.04 121629 17.Bxa6 Nxa6 18.Rd1 Bxb2 19.Ne2
Bf6 20.Ne6 Nxd5
0:03 1/8 0.04 248763 17.Bxa6 Nxa6 18.Rd1 Bxb2 19.Ne2
Bf6 20.Ne6 Nxd5
0:09 1/9 -0.20 683234 17.Bxa6 Nxa6 18.Rd1 Nc4 19.Bc1
Bg4 20.Ne6 Bxd1 21.Kxd1 Nxb2+ 22.Bxb2
Bxb2
0:28 1/10 -0.53 2056780 17.Bxa6 Nxa6 18.Nf3 Nxd5 19.Bd2
Bf6 20.Ba5 Bf5 21.Nxb7 Re8+ 22.Ne5
Nxf4
0:47 1/10 -0.43 3396746 17.Nf3 Ra4 18.O-O-O Rxa2 19.Ne5
Ra1+ 20.Kc2 Rxd1 21.Kxd1 Bf6 22.Ndf7
Nxd5 23.Bxc5 Nxf4
1:25 1/10 -0.21 6084508 17.Bxc5 Ra4 18.Rd1 Bxb2 19.Ne2
Bf6 20.Bxb6 axb6 21.Ne6 Rxa2 22.N6d4
Nd7
2:24 2/11 -0.63 10478623 17.Bxc5 Bxb2 18.Bxa6 Nxa6 19.Bxb6
Bxa1 20.Ba5 Nc5 21.Nf3 Bf5 22.Ne5
Rc8
3:03 2/11 -0.46 13375266 17.Nf3 Bf6 18.Bxc5 Bxd8 19.Bxa6
Nxa6 20.Bxb6 Bxb6 21.Rd1 Bf5 22.Ke2
Re8+ 23.Ne5
jm
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