Author: Bernhard Bauer
Date: 07:18:47 12/18/01
Go up one level in this thread
On December 18, 2001 at 09:14:07, José Antônio Fabiano Mendes wrote:
> This is a very long story, including the familiar subplot of White trying a
>little too hard to win and then losing his objectivity. Here I will present just
>one snapshot. After a few inaccurate moves by White, the following position was
>reached:
> [D]5b2/k4N2/6p1/8/1p2Pp1p/1K5P/6P1/8 b
> The tables have been turned, clearly, but one would guess White could still
> hold a draw. Here Dolmatov found the remarkably subtle idea 63...Kb8!!
> Dvoretsky comments:
> A fantastic move! Let us try and decipher it.
> Black’s first objective is to consolidate his kingside by Be7
> and g6-g5, after which his opponent will constantly have to
> reckon with ...g5-g4. Here 63...Be7? is not possible in
> view of 64. Ne5 with the threats of 65. Nc6+ and 65.
> Nxg6, so Dolmatov first wants to bring up his king.
>
> After 63...Kb7? White saves himself by 64. Nd8+! Kc8 65.
> Ne6 Bd6 66. e5! Bxe5 67. Kxb4, while if 63...Kb6? there
> follows 64. Ne5 with the threats of 65. Nxg6 and 65. Nd7+.
> Black’s only chance is a piece sacrifice. But where can he
> move his king after 64...g5 65 Nd7+ ? [ 65...Kb5? 66. Nxf8
> g4 67. Ne6 f3 68. Nd4+ and 69. Nxf3 will not do. He also
> loses after 65...Kb7? 66. Kxf8 g4 67. Ne6! f3 68. gxf3 gxh3
> 69. Nc5+ Kc6 70. Nd3, ... while if 65...Ka5(a7) 66. Nxf8
> g4 67. e5! and the pawns queen simultaneously.]
>
> By playing 63...Kb8!! Black prepares in the variation with
> the piece sacrifice to occupy c8, the ideal square for his king ,
> here it does not come under check by the knight and it also
> halts the advance of the e-pawn: 64. Ne5 g5! 65. Nd7+ (65.
> Nc6+ Kc7 66. Nxb4? Bxb4 67. Kxb4 g4; 65. Ng6 Bc5 66.
> Kc4 Kc7 67. Kxc5? b3 68. Ne7 b2 69. Nd5+ Kd7 70. Nc3
> g4 71. Kd4 g3! and 72...f3) 65...Kc8! 66. Nxf8? g4, and White loses.
> Phew! On this game Mikhail Tal’s comment (proudly
> displayed as the opening quotation for this chapter) was :
> "The young Moscow grandmaster found such a fantastic idea of
> mutual zugzwang with his opponent to move, that certain
> grandmasters still look at it and are unable to understand it."
> --------------------------------------------------------------
> Source: http://www.chesscafe.com/REVIEWS/books.HTM
Crafty 18.12 with some mods finds Kb8 in 90 sec on a 2xP3-450 Computer.
Here the log.
15 10.22 -1.24 1. ... Kb7 2. Kc4 Kc7 3. Ng5 Bd6 4.
Ne6+ Kd7 5. Nd4 g5 6. Nf3 Be7 7. Ne5+
Ke8 8. Nc6 Bd6 9. e5 Kd7 10. exd6 Kxc6
15-> 10.80 -1.24 1. ... Kb7 2. Kc4 Kc7 3. Ng5 Bd6 4.
Ne6+ Kd7 5. Nd4 g5 6. Nf3 Be7 7. Ne5+
Ke8 8. Nc6 Bd6 9. e5 Kd7 10. exd6 Kxc6
16 15.76 -0.98 1. ... Kb7 2. Nd8+ Kb6 3. Ne6 Bd6 4.
e5 Bxe5 5. Kxb4 Kc6 6. Kc4 Kd6 7. Nf8
g5 8. Nh7 g4 9. hxg4 Ke6
16 25.98 -1.01 1. ... Ka6 2. e5 Kb6 3. Nd8 g5 <HT>
(2) 16-> 25.98 -1.01 1. ... Ka6 2. e5 Kb6 3. Nd8 g5 <HT>
17 28.98 -1.01 1. ... Ka6 2. e5 Kb6 3. Nd8 g5 4. Ne6
Be7 5. Kc4 Kc6 6. Nd4+ Kc7 7. Kd5 Kb6
8. e6 Bc5 9. Nc6 b3 10. e7 b2 11. e8=Q
b1=Q
(3) 17-> 37.86 -1.01 1. ... Ka6 2. e5 Kb6 3. Nd8 g5 4. Ne6
Be7 5. Kc4 Kc6 6. Nd4+ Kc7 7. Kd5 Kb6
8. e6 Bc5 9. Nc6 b3 10. e7 b2 11. e8=Q
b1=Q
(2) 18 1:01 -0.78 1. ... Ka6 2. Ne5 g5 3. Nf3 Be7 4.
Nd4 Bf6 5. Nf3 Kb5 6. e5 Bh8 7. Nd4+
Kc5 8. Ne6+ Kd5 9. Nxg5 Bxe5 10. Kxb4
Bd4 11. Nf7
18 1:27 -1.06 1. ... Kb8 2. Ne5 g5 3. Nf3 Be7 4.
Kc4 Kc7 5. e5 Kc6 6. Nd4+ Kd7 7. Kd5
Ke8 8. Nb3 Kf7 9. e6+ Kf6 10. Nd4 <HT>
(2) 18-> 1:34 -1.06 1. ... Kb8 2. Ne5 g5 3. Nf3 Be7 4.
Kc4 Kc7 5. e5 Kc6 6. Nd4+ Kd7 7. Kd5
Ke8 8. Nb3 Kf7 9. e6+ Kf6 10. Nd4 <HT>
19 2:14 -1.11 1. ... Kb8 2. Ne5 g5 3. Nf3 Be7 4.
Kc4 Kc7 5. Nd4 Kd8 6. Nf3 Kd7 7. Nd4
Kd6 8. Nf3 Kd7 <HT>
19-> 2:25 -1.11 1. ... Kb8 2. Ne5 g5 3. Nf3 Be7 4.
Kc4 Kc7 5. Nd4 Kd8 6. Nf3 Kd7 7. Nd4
Kd6 8. Nf3 Kd7 <HT>
20 3:23 -1.11 1. ... Kb8 2. Ne5 g5 3. Nf3 Be7 4.
Kc4 Kc7 5. Nd4 Kd8 6. Nf3 Kd7 7. Nd4
Kd6 8. Nf3 Kd7 <HT>
20-> 3:46 -1.11 1. ... Kb8 2. Ne5 g5 3. Nf3 Be7 4.
Kc4 Kc7 5. Nd4 Kd8 6. Nf3 Kd7 7. Nd4
Kd6 8. Nf3 Kd7 <HT>
21 8:50 -0.91 1. ... Kb8 2. e5 Kc7 3. Ng5 Kd8 4.
Kc4 Be7 5. Ne6+ Ke8 6. Nxf4 Kf7 7.
Ne2 Ke6 8. Kd4 b3 9. Kc3 Kxe5 10. Kxb3
Bc5 <HT>
(2) 21-> 14:00 -0.91 1. ... Kb8 2. e5 Kc7 3. Ng5 Kd8 4.
Kc4 Be7 5. Ne6+ Ke8 6. Nxf4 Kf7 7.
Ne2 Ke6 8. Kd4 b3 9. Kc3 Kxe5 10. Kxb3
Bc5 <HT>
time=15:00 cpu=203% mat=-1 n=361325720 fh=87% nps=401k
ext-> chk=14495356 cap=410991 pp=2937377 1rep=204307 mate=7750
predicted=0 nodes=361325720 evals=67271905
endgame tablebase-> probes done=86560 successful=86560
SMP-> split=4664 stop=554 data=11/32 cpu=30:28 elap=15:00
Kind regards
Bernhard
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