Author: Kurt Utzinger
Date: 11:07:07 07/13/03
Go up one level in this thread
On July 13, 2003 at 13:48:11, Steven J. Brann wrote:
>On July 13, 2003 at 05:06:35, Kurt Utzinger wrote:
>
>>Is there a program to find the nice, very strong and winning sacrifice
>>20.Rd6 !!
>>
>>Hort,V-Kurajica,B (1976)
>>[D]r3kb1r/5qpp/bp2p3/p1p1Pp2/P6Q/1P2BN2/2P2PPP/3RR1K1 w kq - 0 20
>>
>>
>>[Event "Vinkovci"]
>>[Site "?"]
>>[Date "1976.??.??"]
>>[Round "?"]
>>[White "Hort, Vlastimil"]
>>[Black "Kurajica, Bojan"]
>>[Result "1-0"]
>>[ECO "B30"]
>>[PlyCount "57"]
>>[EventDate "1976.??.??"]
>>
>>1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. O-O a6 5. Bxc6 dxc6 6. d3 Qc7 7. e5 f5 8. a4
>>a5 9. Na3 Ne7 10. Nc4 Nd5 11. Re1 Nb6 12. Nxb6 Qxb6 13. b3 Qc7 14. d4 $1 cxd4
>>15. Qxd4 b6 16. Qc4 Qd7 17. Be3 Ba6 18. Qh4 c5 19. Rad1 Qf7 20. Rd6 {
>>Dieses positionelle Qualitaetsopfer gewinnt die Partie.} 20... Bxd6 21. exd6
>>O-O 22. Ne5 Qb7 23. Bg5 Qd5 24. Be7 Bb7 25. f3 Qd2 26. d7 Rfb8 27. c4 Qc3 28.
>>Kf1 Qd2 29. Qg5 $1 (29. Qg5 Qxg5 (29... Qc3 30. Bf6 g6 31. Qh6) 30. Bxg5 Kf8
>>31. Rd1 Rd8 32. Rd6) 1-0
>>
>>Qh6) 30. Bxg5 Kf8
>>31. Rd1 Rd8 32. Rd6) 1-0
>
>Chessmaster 9000 (default SS=14) suggests that 20. Rd2 is stronger (0.90) than
>20. Rd6 (0.37). Forcing the text line a move at a time shows a slight advantage
>for white but does not encounter anything really decisive until black's 27...Qc3
>which was not the best move. This was 8th in Chessmaster's move order and left
>white with a 3.45 advantage.
>
>I doubt that there will be too many engines (if any) that would choose the
>initial move 20. Rd6.
>
>Sacrifices and brilliancies always appear better when the opponent exhibits
>sub-optimal play.
>
>Steve
I do not think that 32.Rd2 is stronger. After 32.Rd6 !! Black has indeed
no defence because pawn b6 is attacked an White threatens to also win
with Ng5. And after a waiting move like 32...Be7 it follows 33.Bg5 ! and
White easily wins.
Kurt
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