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Subject: Re: WCCC 2002: Round 2 - WARP vs. DIEP /Including testposition(s)

Author: Peter Berger

Date: 12:34:59 07/07/02

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On July 07, 2002 at 08:38:32, Eduard Nemeth wrote:

[Event "WCCC"]
[Site "Maastricht"]
[Date "2002.07.07"]
[Round "2"]
[White "WARP"]
[Black "Diep"]
[Result "1/2-1/2"]
[ECO "A33"]
[PlyCount "116"]
[EventDate "2002.??.??"]

1. c4 c5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4
Bb4 9. Qe2 d6 10. f4 Nc6 11. Be3 Bxc3+ 12. bxc3 Qc7 13. Bg2 b6 14. O-O O-O 15.
g4 Bb7 16. g5 Nd7 17. Rf3 Ne7 18. Rh3 Rfc8 19. Qh5 Nf8 20. Nd2 Neg6 21. Rf1 Qc6
22. Rf2 Qd7 23. f5 exf5 24. exf5 Bxg2 25. Kxg2 Ne5 26. Bd4 Re8 27. Kh1 Rac8 28.
f6 Ng4 29. Rg2 Re1+ 30. Bg1 Ne5 31. Qh4 Rd1 32. fxg7 Kxg7 33. Ne4 Qf5 34. Qh6+
Kh8 35. Nxd6 Rxd6 36. Qxd6 Ne6 37. Rhg3 Rd8 38. Qe7 Rd1 39. Qe8+ Kg7 40. Qa4
Qb1 41. Qb3 Qc1 42. c5 Nf4 43. Rc2 Rxg1+ 44. Rxg1 Qe3 45. Qb1 Qf3+ 46. Rgg2
Nxg2 47. Rxg2 Nd3 48. Qg1 bxc5 49. h4 Nf4 50. Qf2 Qxg2+ 51. Qxg2 Nxg2 52. Kxg2
Kg6 53. Kf3 Kf5 54. c4 a5 55. a4 Ke5 56. Ke3 Kf5 57. Kf3 Ke5 58. Ke3 Kf5
1/2-1/2

I think your analysis misses a few interesting turning points in this game - at
least one of them should be good for a testposition.

Diep played on a Dual AMD K7 in this game, so no really big hardware although
quite OK of course :).

The position after opening and in early middlegame was unbalanced.

At move 31 the position is about equal with probably a little advantage for
Diep.

Then Diep commited a horrible blunder 31...Rd1?? which should have lost the
game:

WARP - Diep
[D]2r2nk1/p2q1ppp/1p1p1P2/4n1P1/2P4Q/2P4R/P2N2RP/4r1BK b - - 0 1 am Rd1

This one could be difficult for some other engines, too.

You mentioned the next one, the awful 38. Qe8+?? which in my opinion already
spoils the game to a draw ( although this would be very difficult to prove of
course)

WARP - Diep
[D]3r3k/p4p1p/1p1Qn3/4nqP1/2P5/2P3R1/P5RP/6BK w - - 0 1 am Qe8+

This is probably an engine-specific problem, other engines probably have no
problems here. Easiest looks Qf6+ with a sure win.

Without diagram another maybe interesting one:

WARP - Diep
8/p4pkp/1p2n3/4n1P1/Q1P5/2P3R1/P5RP/1q1r2BK w - - 0 1 am Qb3

Qb3 ?! isn't really a bad move but it looks quite senseless. If white wants to
play c5 why not do it right now ? After Qb3 the queen is at a worse position for
c5.


But then there was also a rather brilliant move that might be a good
testposition IMHO:

WARP - Diep
[D]8/p4pkp/1p2n3/2P1n1P1/8/1QP3R1/P5RP/2qr2BK b - - 0 1 bm Nf4

While the obvious 42. .. Nxc5 ?! might have been sufficient to hold after a long
and dangerous fight, 42...Nf4 !! is clearly the best move, pretty, surprising,
witty and a clear draw although very deep.
The mainline to get this with drawscore should be something like 20 ply. Can
your engine find this one, too ?

Cheers,
Peter



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