Author: Roy Eassa
Date: 13:29:14 08/19/02
Go up one level in this thread
On August 19, 2002 at 13:33:29, Thomas Lagershausen wrote:
>On August 19, 2002 at 13:28:02, Thomas Lagershausen wrote:
>
>[D]3qr1k1/p2bppb1/3p2p1/1prNn1Bn/3NP1p1/1B3P2/PPPQ4/1K1R3R w - - 18.Rxh5 ! gxh5
>19.Qh2 with the idear a5 20.Qxh5 a4 21.Rh1 axb3 22.Qh7+ Kf8 23.Bh6 Bxh6 24.Qh8
>mate
>>The keymove against the dragon is the rooksacrifice on h5 to attack the black
>>king with queen and the other rook on the h-file.After trading the bishop on g7
>>white can mate on h8.
>>
>>Are they any programs able to attack the black king in this traditional and
>>sucessfull method at the moment?
>>
>>If not, how to beat Kasparov or Kramnik if they play the dragon?
>>
>>[Event "NIC 1/87"]
>>[Site "Olympiade Dubai"]
>>[Date "1986"]
>>[Round "?"]
>>[White "Karpov, A"]
>>[Black "Sznapik"]
>>[ECO "B78"]
>>[Result "1-0"]
>>
>>1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3
>>Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Ne5 11. Bb3
>>Rc8 12. h4 h5 13. Bg5 Rc5 14. Kb1 b5 15. g4 hxg4 16. h5
>>Nxh5 17. Nd5 Re8 18. Rxh5 gxh5 19. Qh2 Rc4 (19... gxf3
>>20. Qxh5 Bg4 21. Qh4 Rxd5 22. Bxd5 Qb6 23. Bh6 e6 24. Qg5
>>Ng6 25. Nf5 Bh8 26. Qxg4 exd5 27. Be3 d4 28. Qxf3 Qc7
>>29. Bxd4 Be5 30. Bxe5 dxe5 31. Qh3 Qb6 32. Qh6 Qf6
>>33. Rd7 $16) 20. Bxc4 bxc4 21. Qxh5 f6 22. f4 Nf7 23. Bh4
>>Qb8 24. Rh1 c3 25. b3 Qb7 26. f5 Ne5 27. Ne6 1-0
>>
>>TL
I don't think most programs will play the exchange sacrifice, at least not
without many hours of thought. After showing it the sac, it still takes Fritz 7
quite awhile to see that White is better. Here's a little analysis:
1.Rxh5! gxh5 2.Qh2 gxf3
[2...a5 3.Qxh5 g3 4.Rh1 g2 5.Qh7+ Kf8 6.Rg1 Ng6 7.Bh6 +-]
3.Qxh5 Kf8
[3...f2 4.Rh1 Qa5 5.c3 f1Q+ 6.Rxf1 Bg4 7.Qh4 Rxd5 8.Bh6+-]
[3...Bg4 4.Qh4 Qd7
(4...f2 5.Rh1 f1Q+ 6.Rxf1 +-)
5.Rh1 Bh3 6.Rxh3 Qg4 7.Nf5 Qxh4 8.Rxh4
(8.Bxh4 e6 9.Nxd6
(9.Nf6+ Bxf6 10.Bxf6 Ng6 11.Nxd6 f2 12.Rf3 Rh5 13.c4 Rh1+
14.Kc2 f1Q 15.Rxf1 Rxf1 16.Nxe8 Kf8 =)
9...exd5 10.Nxe8 dxe4 11.Bf2 Rc8 12.Nxg7 Kxg7 13.Bxa7 ±
(13.Bd4 Rd8 makes White's win much more difficult))
8...e6 9.Nxd6 f2
(9...Rb8 10.Be3 Nd7 11.Rg4 +-)
10.Rf4 Kf8 11.Nxe8 Kxe8 12.Bf6 exd5 13.Bxg7 dxe4 14.Rxf2 +-]
4.Qh7 Ng4 5.Nxf3! +-
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