Author: Paulo Soares
Date: 19:10:03 04/06/00
Go up one level in this thread
On April 06, 2000 at 11:19:47, Ernst A. Heinz wrote:
>Hi Morgens,
>
>>This is the game Karpov-Zaitsev from 1970. According to Kotov 20... e5! would
>>lead to victory for black. Instead he played 20... h6? and eventually lost.
>>
>>[D]r3k2r/1p1n1qpp/p3p3/6QP/4K1P1/2Pp1PbR/PP6/R1B2B2 b kq - 0 20
>>
>>Hopefully it works.
>
>This looks like an unusual and very interesting position. Is there
>any good analysis arguing for 20.. h6 being bad? Maybe, Zaitsev's
>decisive error occurred only later.
>
>"DarkThought WCCC'99" scores 20.. h6 as roughly +1.5 positive for
>Black after completing iteration #16 (see ouptut below).
>
>05:17:39 16.01 h6 Qe3 Nf6+ Kxd3 Nxg4 Qc5 Qxf3+ Kc2 Rd8 Qc4 =1.53 #6049470335
>
>=Ernst=
>
>P.S.
>Please find the WWW pages of "DarkThought" at URL
>http://supertech.lcs.mit.edu/~heinz/dt/.
I (the program) think that, 20 ...h6 is a good move, black should play, in the
line of the
game, 21 ...Nf6+ instead 21 ...e5.
In the line studied by Kotov, I think that 23.Rh3 are not a good move, perhaps
23.Bxd3 are better. Below some lines:
[Event "Kuibyshev"]
[Site "Kuibyshev"]
[Date "1970.??.??"]
[Round "?"]
[White "Karpov30"]
[Black "?"]
[Result "1-0"]
[ECO "B17"]
[PlyCount "81"]
[EventDate "1970.??.??"]
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Ne5 Bf5
8. c3 e6 9. g4 Bg6 10. h4 Bd6 11. Qe2 c5 12. h5 Be4 13. f3 cxd4 14. Qb5+ Nd7
15. Nxf7 Bg3+ 16. Ke2 d3+ 17. Ke3 Qf6 18. Kxe4 Qxf7 19. Rh3 a6 20. Qg5 h6 (
20... e5 21. Rxg3 Nc5+ 22. Ke3 O-O 23. Bxd3 (23. Rh3 Rad8 24. Bd2 Ne4 25. Kxe4
Qd5+ 26. Ke3 Qc5+ 27. Ke4 Rd4+ 28. Ke3 Rxg4+ 29. Kxd3 e4+ 30. fxe4 Rxg5 31.
Bxg5 Qxg5 {-+}) 23... Qf4+ (23... Rad8 24. Bc2 (24. Bf5 Qc4 (24... Ne6 25. Bxe6
Qxe6 26. h6 g6 27. Ke2 Qc4+ 28. Ke1 Qd3 29. Be3)) 24... Qc4 25. Kf2 Ne4+ (25...
e4 26. h6) 26. Bxe4 Rd1 27. Rg1 Qxe4 28. Qe3 Qc2+ 29. Kg3 Rd3 (29... Rxg1+ 30.
Qxg1 e4 31. fxe4 Qxe4 32. Qe3) 30. Qf2 Rdxf3+ 31. Qxf3 Rxf3+ 32. Kxf3 e4+ 33.
Ke3 Qd3+ 34. Kf4 Qf3+ 35. Ke5 e3 36. a4 Qf2 37. Bxe3 Qxe3+ 38. Kd5) (23... Nxd3
24. Kxd3 e4+ (24... Rad8+ 25. Kc2 Qd7 26. Qe3 Qd1+ 27. Kb1) 25. Kc2 exf3 (25...
h6 26. Qf5) 26. h6 g6 (26... f2 27. Be3 g6 28. Rf1) 27. Be3 Qe6 (27... f2 28.
Rf1) 28. Qc5 Rae8 29. Qd4 Re7 30. Re1 f2 (30... Rd7 31. Bf2) (30... b5 31. Bf2
Qf7 32. Rxe7 Qxe7 33. Rg1) 31. Rf1) (23... e4) 24. Qxf4 exf4+ 25. Kd4 Nxd3 (
25... Ne6+ 26. Ke5 Rae8 27. Bc4 fxg3 28. Bg5 h6 29. Bxe6+ Rxe6+ 30. Kxe6 hxg5
31. Rf1) (25... fxg3 26. Kxc5 Rxf3 27. Bc4+ Kh8 28. Bg5) 26. Rg1 Rad8+ 27. Kc4
Ne5+ 28. Kb3 Nxf3 29. Rf1 Nd2+ 30. Bxd2 Rxd2) 21. Qe3 (21. Qa5 b6 22. Qb4 Nc5+
23. Ke3 Qc7 24. Bxd3 O-O-O 25. Bxa6+ Nxa6 26. Qb5 Nc5 27. Ke2 Rd3 28. Rxg3 Qe5+
29. Kf1 Qxg3) 21... e5 (21... Nf6+ 22. Kxd3 Nxg4 23. Qc5 (23. Qd4 Rd8 (23...
Nf2+ 24. Ke2 e5 25. Qa4+ b5 26. Qb3 Nxh3 27. Bxh3 Bf4) 24. Rxg3 Rxd4+ 25. cxd4
Nf6) 23... Qxf3+ 24. Kc2 Nf2 25. Rxg3 Qxg3 26. Bd2 Ne4 27. Qc4 Qe5 28. Re1 Nxd2
29. Rxe5 Nxc4 30. Rxe6+ Kd7 31. Bxc4 Rhe8) 22. Kxd3 Bf4 23. Qg1 O-O-O 24. Kc2
Bxc1 25. Rxc1 Qxa2 26. Rh2 Rhf8 27. Rd2 Qa4+ 28. Kb1 Qc6 29. Bd3 Kc7 30. Be4
Qb6 31. Qh2 Rde8 32. Rcd1 Nf6 33. Bg6 Re7 34. Re1 Qb5 35. Rde2 Nd7 36. Bf5 Rxf5
37. gxf5 Qd3+ 38. Ka1 Qxf5 39. Qh4 Nf6 40. Qc4+ Kd8 41. Qc5 1-0
Paulo Soares, from Brazil
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