Author: John Merlino
Date: 08:57:16 04/15/04
Go up one level in this thread
On April 15, 2004 at 10:04:27, Mihaly Szalai wrote:
>[Event "Pucarevo (zt)"]
>[Site "?"]
>[Date "1987.??.??"]
>[Round "?"]
>[White "Marjanovic, S."]
>[Black "Yilmaz, T."]
>[Result "1-0"]
>[ECO "C84"]
>[WhiteElo "2505"]
>[BlackElo "2375"]
>[PlyCount "67"]
>[EventDate "1987.??.??"]
>
>{43/425} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 exd4 6. O-O Be7 7. e5
>Ne4 8. Nxd4 Nxd4 9. Qxd4 Nc5 10. Nc3 Nxa4 {N} (10... O-O) 11. Qxa4 (11. Nxa4)
>11... O-O 12. Bf4 $1 (12. Be3 d5 $11) 12... b5 (12... f6 $2 13. Qc4+ {>< c7}) (
>12... d5 13. exd6 Bxd6 14. Rad1 Bd7 15. Qd4 Bxf4 16. Qxf4) 13. Qd4 Bb7 14. Rad1
>Bc6 15. Nd5 $14 {|^} Re8 16. Rd3 Bf8 (16... d6 17. exd6 (17. Nxc7 $16) 17...
>Bxd6 (17... cxd6 18. Rg3 f6 19. Bh6 g6 20. Re1 $16 {->}) 18. Rg3 Bf8 19. Bh6 $1
>$16 {->}) (16... Bxd5 17. Qxd5 d6 18. exd6 Bxd6 19. Bxd6 cxd6 20. Qxd6 $16) 17.
>Bg3 Qc8 $2 {/\ 18...Bd5 19.Qd5 d6} (17... d6 18. Nb4 (18. Bh4 dxe5 19. Qg4 Qxd5
>$1 20. Rxd5 Bxd5 $44) 18... Bxg2 19. Kxg2 c5 20. Qd5 cxb4 21. exd6 $16) 18.
>Nf6+ $1 gxf6 19. Bh4 Re6 (19... Be7 20. Qf4 $1 Qd8 21. exf6 Bf8 22. Rg3+ Kh8
>23. Qg5 $1 Bh6 24. Qxh6 Rg8 25. Rg7 Be4 26. f4 $18) 20. Rg3+ Kh8 21. Qg4 Bh6
>22. Qxe6 $3 fxe6 23. Bxf6+ Bg7 24. Rxg7 h5 (24... h6 25. Rd1 Qf8 $1 26. Rgxd7+
>Kg8 27. Rxc7 Be4 (27... Qc5 28. Rd3 Qxc2 29. Rg3+ Kf8 30. h3 $18) 28. Rdd7 $18)
>25. Rd1 Qf8 $1 26. Rg5+ $1 Kh7 27. Rxh5+ Kg6 28. Rg5+ Kf7 (28... Kh6 {/\ Qf6}
>29. Rg4 $1 Kh5 30. Rdd4 $18) 29. Rd4 Qh6 30. Rf4 $1 Qh7 31. Rfg4 Kf8 32. Rg7
>Qh8 33. Be7+ Ke8 34. Bb4 1-0
>
>Position after 17... Qc8:
>[D]r1q1rbk1/2pp1ppp/p1b5/1p1NP3/3Q4/3R2B1/PPP2PPP/5RK1 w - - 0 18
>
>18. Nf6+!
>
>Tactical minded people make this move much easier than chess programs. The white
>forces are promising ("this sac must be good"), however there is no mate attack
>and the brilliant queen sac four moves later would deserve another diagram.
>
>You should show it to your favourite engine. (I don't expect a long thread
>though.)
>
>Thanks
>Mihaly
Chessmaster 9000, SKR personality on an AMD 2500+, does not find the sacrifice
in over twenty minutes:
Time Depth Score Positions Moves
0:00 1/6 0.71 64213 18.Rfd1 d6 19.exd6 Bxd5 20.Qxd5
Bxd6 21.R3d2
0:00 1/6 0.75 98128 18.Re1 d6 19.Rdd1 Bxd5 20.Qxd5
c6 21.Qf3 d5
0:00 1/6 0.84 119346 18.Rd2 a5 19.c4 Bb4 20.Rdd1 Qb7
0:01 1/7 0.77 223280 18.Rd2 a5 19.Re1 Qb7 20.c4 bxc4
21.Qxc4 Bb4
0:03 1/8 0.69 607685 18.Rd2 Qb7 19.c4 d6 20.Rc1 dxe5
21.Bxe5 bxc4 22.Rxc4 Bxd5 23.Qxd5
Qxd5 24.Rxd5
0:04 1/8 0.79 770345 18.Rfd1 Qb7 19.h3 d6 20.exd6 cxd6
21.Qg4 Bxd5 22.Rxd5
0:07 1/9 0.70 1621826 18.Rfd1 Qb7 19.Qg4 Re6 20.Qf5 Rg6
21.R3d2 Bc5 22.Qf3 b4
0:21 1/10 0.66 4683961 18.Rfd1 Bxd5 19.Qxd5 d6 20.exd6
cxd6 21.Rc3 Qe6 22.Qxe6 Rxe6 23.Rc7
Rae8
0:54 1/11 0.65 13652684 18.Rfd1 Qb7 19.Qg4 Bxd5 20.Rxd5
d6 21.Qf5 Qc8 22.Qe4 c6 23.R5d2
d5 24.Qe3
2:23 1/12 0.58 36981539 18.Rfd1 Qb7 19.c4 d6 20.Rb3 Rad8
21.exd6 cxd6 22.Qd2 Rc8 23.Rb4
Bxd5 24.cxd5
6:42 1/13 0.57 105050058 18.Rfd1 Qb7 19.c4 d6 20.b3 bxc4
21.bxc4 Ba4 22.Rc1 c6 23.Qb6 Rab8
24.Qxb7 Rxb7
18:17 2/14 0.50 303601782 18.Rfd1 Bxd5 19.Qxd5 d6 20.exd6
cxd6 21.c3 Qe6 22.Qxe6 Rxe6 23.R3d2
Rae8 24.f3 Re2 25.Bxd6 Bxd6 26.Rxe2
Rxe2 27.Rxd6
As for the queen sacrifice in this position:
[D]r1q4k/2pp1p1p/p1b1rp1b/1p2P3/6QB/6R1/PPP2PPP/5RK1 w - - 0 22
The King finds it in 35 seconds:
Time Depth Score Positions Moves
0:00 1/3 -0.29 1953 22.Bxf6+ Rxf6 23.exf6 d6 24.Qh4
0:00 1/4 0.37 4253 22.Bxf6+ Rxf6 23.exf6 d6 24.Qh4
Qf8 25.Rd1
0:00 1/5 0.11 24858 22.Bxf6+ Rxf6 23.exf6 Qf8 24.Rd1
Qc5 25.Rh3 Rg8
0:00 1/6 0.11 57572 22.Bxf6+ Rxf6 23.exf6 Qf8 24.Rd1
Qc5 25.Rh3 Rg8
0:00 1/7 -0.01 158674 22.Bxf6+ Rxf6 23.exf6 Qf8 24.Re1
Qd6 25.Rge3 Rf8 26.Re8 Qxf6
0:01 1/8 0.00 437679 22.Bxf6+ Rxf6 23.exf6 Qf8 24.Qh4
Re8 25.Rh3 Qg8 26.Rg3 Qf8
0:04 1/9 0.00 1056990 22.Bxf6+ Rxf6 23.exf6 Qf8 24.Qh4
Re8 25.Rh3 Qg8 26.Rg3 Qf8
0:08 1/10 0.00 2818409 22.Bxf6+ Rxf6 23.exf6 Qf8 24.Qh4
Re8 25.Rh3 Qg8 26.Rg3 Qf8
0:21 1/11 0.00 6759767 22.Bxf6+ Rxf6 23.exf6 Qf8 24.Qh4
Re8 25.Rh3 Qg8 26.Rg3 Qf8
0:35 1/11 1.58 11884333 22.Qxe6 fxe6 23.Bxf6+ Bg7 24.Rxg7
h6 25.Rd1 Qf8 26.Rf7+ Kg8 27.Rxf8+
Rxf8 28.f3 a5 29.Be7 Rf7
0:43 1/12 1.54 14669042 22.Qxe6 fxe6 23.Bxf6+ Bg7 24.Rxg7
h6 25.Rd1 Qf8 26.Re7+ Kg8 27.Rd3
Qxe7 28.Bxe7 Kf7 29.Bc5 Rg8 30.f3
a5 31.Be3
1:08 1/13 1.51 25029730 22.Qxe6 fxe6 23.Bxf6+ Bg7 24.Rxg7
h6 25.Rd1 Qf8 26.Rf7+ Kg8 27.Rxf8+
Rxf8 28.Rd3 Kf7 29.Rh3 Rg8 30.g3
Kg6 31.Rh4
jm
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