Author: Frank E. Oldham
Date: 23:02:14 08/05/04
Go up one level in this thread
On August 05, 2004 at 19:42:24, Albert Silver wrote:
>The following position arose in Kasparov-Andersson, Tilburg, 1981. Kasparov,
>only 18 at the time, played a brilliant pawn sac that left Andersson unable to
>develop and to his loss in spectacular fashion. It is a difficult move to find,
>and I am not even sure whether any engine will, yet it is unquestionably the
>best move.
>
> Albert
>
>[D]r2qkb1r/n1pp1pp1/4p1bp/1p6/1P1P3P/P3P1P1/1B1N1P2/R2QKB1R w KQkq -
>14.d5 is the move here.
crafty19.15, Mac dual G5, finds it pretty easily in ply 14
by ply 17 the PV matches the game very well
11-> 3.30 0.21 1. Bg2 d5 2. O-O Be7 3. e4 dxe4 4.
Nxe4 O-O 5. Nc5 Rc8 6. Qg4 Bc2 (s=4)
12 6.18 0.28 1. Bg2 c6 2. O-O Be7 3. e4 O-O 4. h5
Bh7 5. Rc1 Qc7 6. Qg4 d5 (s=3)
12-> 7.94 0.28 1. Bg2 c6 2. O-O Be7 3. e4 O-O 4. h5
Bh7 5. Rc1 Qc7 6. Qg4 d5
13 13.46 0.16 1. Bg2 d5 2. e4 dxe4 3. Nxe4 Be7 4.
Nc5 Rb8 5. a4 O-O 6. a5 Bxc5 7. dxc5
Qxd1+ 8. Rxd1 Rbd8 9. Rxd8 Rxd8
13-> 23.01 0.16 1. Bg2 d5 2. e4 dxe4 3. Nxe4 Be7 4.
Nc5 Rb8 5. a4 O-O 6. a5 Bxc5 7. dxc5
Qxd1+ 8. Rxd1 Rbd8 9. Rxd8 Rxd8 (s=2)
14 35.47 0.12 1. Bg2 d5 2. e4 c6 3. h5 Bh7 4. Qe2
Be7 5. O-O O-O 6. Rac1 Bd6 7. exd5
cxd5 8. Rfe1
14 1:33 0.31 1. d5 exd5 2. Bg2 c6 3. O-O f6 4. e4
dxe4 5. Bxe4 Bxe4 6. Nxe4 d5 7. Qh5+
Kd7 8. Rad1 Kc7 9. Qe2
14-> 1:33 0.31 1. d5 exd5 2. Bg2 c6 3. O-O f6 4. e4
dxe4 5. Bxe4 Bxe4 6. Nxe4 d5 7. Qh5+
Kd7 8. Rad1 Kc7 9. Qe2 (s=2)
15 2:31 0.42 1. d5 exd5 2. Bg2 c6 3. O-O Qe7 4.
e4 dxe4 5. Nxe4 O-O-O 6. Nc5 d6 7.
Qg4+ Kb8 8. Rae1 h5 9. Rxe7 hxg4
15-> 2:59 0.42 1. d5 exd5 2. Bg2 c6 3. O-O Qe7 4.
e4 dxe4 5. Nxe4 O-O-O 6. Nc5 d6 7.
Qg4+ Kb8 8. Rae1 h5 9. Rxe7 hxg4
16 5:06 0.49 1. d5 exd5 2. Bg2 c6 3. O-O Qe7 4.
e4 dxe4 5. Nxe4 O-O-O 6. Nd2 f6 7.
h5 Bf5 8. Re1 Be6 9. Rc1
16-> 5:36 0.49 1. d5 exd5 2. Bg2 c6 3. O-O Qe7 4.
e4 dxe4 5. Nxe4 O-O-O 6. Nd2 f6 7.
h5 Bf5 8. Re1 Be6 9. Rc1
17 18:07 0.61 1. d5 exd5 2. Bg2 c6 3. O-O f6 4. Re1
Be7 5. Qg4 Kf7 6. h5 Bd3 7. e4 dxe4
8. Bxe4 Bxe4 9. Nxe4 d5 10. Rad1
17-> 18:31 0.61 1. d5 exd5 2. Bg2 c6 3. O-O f6 4. Re1
Be7 5. Qg4 Kf7 6. h5 Bd3 7. e4 dxe4
8. Bxe4 Bxe4 9. Nxe4 d5 10. Rad1
>14.d5 is the move here. Later Gary began the saccing (pieces this time) in the
>following position:
>
>[D]2nq3r/r2pbkp1/2p2p1p/1p5P/1P2N1Q1/P5P1/1B3P2/3RR1K1 w - -
>
>He played 24.Nxf6, though there is probably more than one win at this point.
here crafty prefers Bd4, with score climbing to 3.57 by ply 17
10-> 3.58 0.73 1. Bd4 Rc7 2. Qg6+ Kf8 3. Nc5 Rg8 4.
Na6 Rb7 5. Qf5 d6 6. Bc5
11 4.61 +1 1. Bd4!!
11 6.08 1.31 1. Bd4 Rc7 2. Bc5 d5 3. Nxf6 Kf8 4.
Ne4 Kg8 5. Qe6+ Kh7 6. Qf5+ Kg8 7.
Rd4
11-> 8.30 1.31 1. Bd4 Rc7 2. Bc5 d5 3. Nxf6 Kf8 4.
Ne4 Kg8 5. Qe6+ Kh7 6. Qf5+ Kg8 7.
Rd4 (s=2)
12 10.45 1.23 1. Bd4 Rc7 2. Bc5 Kf8 3. Bxe7+ Nxe7
4. Nd6 Rg8 5. Qe4 Ra7 6. Rd3 Ra8 7.
Rde3 Nd5
12-> 17.20 1.23 1. Bd4 Rc7 2. Bc5 Kf8 3. Bxe7+ Nxe7
4. Nd6 Rg8 5. Qe4 Ra7 6. Rd3 Ra8 7.
Rde3 Nd5 (s=6)
13 23.14 +1 1. Bd4!!
13 33.18 1.94 1. Bd4 Rc7 2. Nc5 Bd6 3. Na6 Rb7 4.
Bc5 Be7 5. Nb8 Bd6 6. Nxc6 Qc7 7. Qg6+
Kg8 (s=5)
13-> 56.12 1.94 1. Bd4 Rc7 2. Nc5 Bd6 3. Na6 Rb7 4.
Bc5 Be7 5. Nb8 Bd6 6. Nxc6 Qc7 7. Qg6+
Kg8 (s=4)
14 1:07 2.09 1. Bd4 Rc7 2. Nc5 Bd6 3. Na6 Rb7 4.
Bc5 Be7 5. Nb8 d6 6. Qe6+ Kf8 7. Nxc6
Qe8 8. Nxe7 Rxe7 9. Bxd6 Nxd6 10. Qxd6
(s=3)
14-> 2:11 2.09 1. Bd4 Rc7 2. Nc5 Bd6 3. Na6 Rb7 4.
Bc5 Be7 5. Nb8 d6 6. Qe6+ Kf8 7. Nxc6
Qe8 8. Nxe7 Rxe7 9. Bxd6 Nxd6 10. Qxd6
(s=7)
15 3:16 2.13 1. Bd4 Rc7 2. Nc5 Re8 3. Qg6+ Kf8 4.
Be5 Ra7 5. Rxd7 Qxd7 6. Nxd7+ Rxd7
7. Bf4 Nb6 8. Qe4 Rd5 9. g4 (s=6)
15-> 6:04 2.13 1. Bd4 Rc7 2. Nc5 Re8 3. Qg6+ Kf8 4.
Be5 Ra7 5. Rxd7 Qxd7 6. Nxd7+ Rxd7
7. Bf4 Nb6 8. Qe4 Rd5 9. g4 (s=4)
16 6:56 +1 1. Bd4!!
16 9:04 +3 1. Bd4!!
16 16:07 3.61 1. Bd4 Rc7 2. Nc5 Kg8 3. Bxf6 Bxf6
4. Ne6 dxe6 5. Rxd8+ Bxd8 6. Qxe6+
Rf7 7. Qxc8 Kh7 8. Qxc6 Rhf8 9. Qg6+
Kg8 10. f4 (s=3)
16-> 22:01 3.61 1. Bd4 Rc7 2. Nc5 Kg8 3. Bxf6 Bxf6
4. Ne6 dxe6 5. Rxd8+ Bxd8 6. Qxe6+
Rf7 7. Qxc8 Kh7 8. Qxc6 Rhf8 9. Qg6+
Kg8 10. f4
17 26:07 3.57 1. Bd4 Rc7 2. Nc5 Kg8 3. Bxf6 Bxf6
4. Ne6 dxe6 5. Rxd8+ Bxd8 6. Qxe6+
Rf7 7. Qxc8 Kh7 8. Qxc6 Rhf8 9. f4
Rf5 10. Qg6+ Kg8
17-> 49:40 3.57 1. Bd4 Rc7 2. Nc5 Kg8 3. Bxf6 Bxf6
4. Ne6 dxe6 5. Rxd8+ Bxd8 6. Qxe6+
Rf7 7. Qxc8 Kh7 8. Qxc6 Rhf8 9. f4
Rf5 10. Qg6+ Kg8 (s=6)
time=50:07 cpu=396% mat=-1 n=7909826900 fh=95% nps=2.63M
ext-> chk=772572383 cap=13255072 pp=3140915 1rep=53234196
mate=2320712
predicted=0 nodes=7909826900 evals=1922476900 50move=0
endgame tablebase-> probes=0 hits=0
SMP-> split=6166 stop=939 data=11/64 cpu=198:51 elap=50:07
when forced to search Kasparov's Nxf6, crafty evaluates it at 2.67 in ply 20,
PV = 1. Nxf6 gxf6 2. Qg6+ Kf8 3. Rxe7 Qxe7 4. Bxf6 Qf7 5. Bxh8 Qxg6 6. hxg6
d6
7. Bf6 Ra8 8. g4 d5 9. Rc1 Ne7 10. g7+ Kf7 11. Bxe7 Kxe7 12. g5 h5
13. Rxc6
Frank
>[Event "It"]
>[Site "Tilburg (Netherlands)"]
>[Date "1981"]
>[Round ""]
>[White "Kasparov Garry (RUS)"]
>[Black "Andersson Ulf (SWE)"]
>[Result "1-0"]
>[Eco "E12"]
>[Annotator ""]
>[Source ""]
>
>1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 Ne4 6.Nxe4 Bxe4 7.Nd2
>Bg6 8.g3 Nc6 9.e3 a6 10.b4 b5 11.cxb5 axb5 12.Bb2 Na7 13.h4 h6
>14.d5 exd5 15.Bg2 c6 16.O-O f6 17.Re1 Be7 18.Qg4 Kf7 19.h5 Bh7
>20.e4 dxe4 21.Bxe4 Bxe4 22.Nxe4 Nc8 23.Rad1 Ra7 24.Nxf6 gxf6
>25.Qg6+ Kf8 26.Bc1 d5 27.Rd4 Nd6 28.Rg4 Nf7 29.Bxh6+ Ke8 30.Bg7 1-0
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