Author: Jeroen van Dorp
Date: 05:27:47 07/23/99
At this very very bad 5,0 game of mine on Chess.net I was analyzing move 37.f3?
and playing until I came at 44...Kxf3. I thought it to be a logical move -that's
what you'll get with a patzer like me- but analysis afterwards with Hiarcs 7.32
(which found some other stupid analysis of me :-( ) showed almost instantly mate
in 23 moves.
As it isn't a tablebase situation I'm astonished again and again by the
possibilities of these chess programs.
If you stronger chess players out there view this situation, would you think
it's possible as a human to rate this as a mate in about 20 moves or so?
And if not, how does a program like Hiarcs or Fritz calculates that so fast?
It didn't do a 23 ply deep brute force search. (so it's possible it overlooks an
escape route, but....)
In fact after some time it still gave 7/19 (I think that means 7 ply brute
force, 19 ply selective search, correct me if'I'm wrong)
This is the FEN
8/8/8/p7/P1p1N2K/5k2/8/8 w - - 0 1
and this is the game
[Event "mmeics rated blitz game"]
[Site "mmeics, Boston, MA USA"]
[Date "1999.07.23"]
[Round "?"]
[White "****"]
[Black "Jeroen"]
[Result "0-1"]
[ECO "B20"]
[WhiteElo "1318"]
[BlackElo "1414"]
1. e4 c5 2. Bc4 Nc6 (2... e6 3. Qe2 Nc6 4. c3 Be7 5. d3 d5 6. Bb3 Nf6 7. Nf3
O-O 8. O-O) 3. d3 Nf6 4. c3 g6 5. Nf3 Bg7 6. Na3 d5 7. exd5 Nxd5 8. Bxd5 Qxd5
9. c4 Qd8 10. Ng5 O-O 11. Qf3 Bf5 12. g4 Qxd3 ? (12... Bxd3 -+) 13. gxf5 Qxf5
14. Qxf5 gxf5 15. O-O Rad8 16. Be3 b6 ? (16... Bxb2 17. Rab1 Bxa3 -+) 17.
Rad1 Bxb2 18. Rxd8 Rxd8 19. Bc1 Bxc1 20. Rxc1 Rd2 (20... h6 21. Nf3 Rd3 !) 21.
Rc2 Rxc2 ? (21... Rd3 22. Nb5 h6 !) 22. Nxc2 Ne5 23. Ne3 f6 24. Ne6 Ng4 ?
25. Nxg4 fxg4 26. Nc7 Kf7 27. Nb5 a6 28. Nc7 a5 29. Nd5 e5 30. Nxb6 f5 31. Nd5
(31. Nd7 ! +-) 31... f4 32. Kg2 Ke6 33. h3 gxh3+ 34. Kxh3 e4 35. Nxf4+ Ke5
36. Kg3 Kd4 37. f3 ? (37. Ne6+ Kxc4 38. Kf4 Kd5 39. Ng5 c4 40. Nxe4 h5 41. f3
h4 42. Kg4 Ke5 43. Kxh4 Kf4 44. a4 Kxf3 ?? {Hiarcs 7.32 #23!!} 45. Nd2+ Ke3 46.
Nxc4+ Ke4 47. Nxa5 Ke5 48. Nb7 Ke6 49. a5 Kd7 50. a6 Kc7 51. Nc5 Kb8 52. Kg4
Ka8 53. Kf4 Kb8 54. Ke4 Ka7 55. Ke5 Ka8 56. Ne6 Kb8 57. Kd5 Kc8 58. Kd6 Kb8 59.
Nc7 Ka7 60. Kc6 Kb8 61. Kb6 Kc8 62. a7 Kd8 63. a8=Q+ Ke7 64. Qf3 Kd6 65. Qf4+
Kd7 66. Qf7+ Kd8 67. Qe8#) 37... exf3 38. Kxf3 Kxc4 39. Ne2 ? Kd3 40. Nc1+ Kd4
41. Nb3+ Kd5 42. Nxa5 c4 43. Nb7 c3 44. Ke2 h5 45. a4 ? (45. Na5 Kc5 46. Nb3+
+/=) 45... h4 46. a5 c2 47. Kd2 h3 48. a6 c1=Q+ 49. Kxc1 h2 50. a7 h1=Q+ 51.
Kb2 Qh8+ 52. Kb3 Qa8 53. Na5 Qxa7 54. Kb4 Qb6+ 55. Ka4 Kd4 56. Nb3+ Kc4 (56...
Kc3 57. Na1 Qb4#) 57. Ka3 Qxb3# {White checkmated} 0-1
Thanks for your comment.
Jeroen ;-}
FYI I have a PII@400 oc'd to 450 (4x112) with 128 Mb
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