Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: BELCT 2001 discussion of the game zarkov-yace

Author: Uri Blass

Date: 09:22:26 10/06/01

Go up one level in this thread


On October 06, 2001 at 11:44:18, Dieter Buerssner wrote:

<snipped>
>>I suspected that Bd7 lose material from only material evaluation and that yace
>>saw positional compensation for the pawn so it chose Bd7 but I have no program
>>with only material evaluation near me to verify if it is truth.
>
>It may still be the case, that positional compensation was seen in lines in the
>search tree, and there is no contradiction. The lines that do not loose material
>may be seen much worse than a pawn positionally.
>
>Regards,
>Dieter

I suspected did not mean that I was sure and I knew that I may be wrong

I did some more big analysis of the game and Deep Fritz has no problem to avoid
21...h6

20...Bd7 seems not to be the best move but I guess that the big blunder is
really 21...h6 and after 20...Bd7 21.Qxd5 it is better to sacrifice a pawn by
21...Bc6 22.Qa2 22...Bxf3 23.gxf3 h6 24.Be3 f4 25.Bxf4 Qxd4 26.Re4(see Deep
Fritz's main line in the last iterations)

I do not know which moves from the moves in the line 21...Bc6 22.Qa2 Bxf3
23.gxf3 h6 24.Be3 f4 25.Bxf4 Qxd4 is losing material for black.


Zarkov4.5T - Yace
[D]1nr1rbk1/qp1b1ppp/8/p2QPpB1/N2P4/P1R2N2/1P3PPP/4R1K1 b - - 0 1

Analysis by Deep Fritz:

21...Rxc3--
  +-  (1.78)   Depth: 1/4   00:00:00
21...Rxc3--
  +-  (1.78)   Depth: 1/4   00:00:00
21...Bxa4!
  +-  (1.47)   Depth: 1/4   00:00:00
21...Bxa4!
  µ  (-1.19)   Depth: 1/4   00:00:00
21...Bxa4 22.e6 fxe6
  µ  (-1.13)   Depth: 2/12   00:00:00
21...Bxa4--
  ³  (-0.53)   Depth: 3/12   00:00:00
21...Bxa4--
  ³  (-0.53)   Depth: 3/12   00:00:00
21...Bxa4 22.Rxc8 Rxc8 23.e6 Bc2 24.exf7+ Kh8
  ³  (-0.47)   Depth: 4/14   00:00:00  2kN
21...Bxa4 22.e6 fxe6 23.Rxe6 Kh8 24.Rxc8 Rxc8 25.Qxf5
  ³  (-0.28)   Depth: 5/16   00:00:00  7kN
21...h6!
  ³  (-0.31)   Depth: 5/21   00:00:00  29kN
21...h6! 22.Rxc8 Rxc8 23.Bxh6
  ³  (-0.34)   Depth: 5/21   00:00:00  34kN
21...h6--
  =  (-0.03)   Depth: 6/19   00:00:00  40kN
21...h6-- 22.Rxc8 Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6
  ²  (0.31)   Depth: 6/22   00:00:00  64kN
21...Bxa4!
  ²  (0.28)   Depth: 6/22   00:00:00  68kN
21...Bxa4! 22.Rxc8 Rxc8 23.e6 g6 24.exf7+ Kh8 25.Bf6+ Bg7 26.Bxg7+
  =  (0.22)   Depth: 6/22   00:00:00  78kN
21...Bxa4 22.Rxc8 Rxc8 23.e6 Bc6 24.Qxf5 f6 25.e7
  ²  (0.44)   Depth: 7/20   00:00:00  125kN
21...h6!
  ²  (0.41)   Depth: 7/27   00:00:00  203kN
21...h6! 22.Rxc8 Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6
  ²  (0.31)   Depth: 7/27   00:00:00  244kN
21...h6 22.Rxc8 Rxc8 23.e6 Bxa4 24.exf7+ Kh8 25.Bd2 Bc2 26.Bxa5
  =  (0.19)   Depth: 8/27   00:00:00  511kN
21...h6 22.Rxc8 Rxc8 23.e6 Bxa4 24.exf7+ Kh8 25.Qxf5 Bd7 26.Qg6 Nc6
  ²  (0.44)   Depth: 9/25   00:00:01  1175kN
21...h6--
  ±  (0.75)   Depth: 10/27   00:00:03  1985kN
21...h6-- 22.Rxc8 Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Qe5 Bxe6 26.Qxe6 Rc2 27.Qxf5
  ±  (0.84)   Depth: 10/29   00:00:04  2725kN
21...Bc6!
  ±  (0.81)   Depth: 10/30   00:00:06  4244kN
21...Bc6! 22.Qb3 b5 23.Nc5 Bxf3 24.Rxf3 Nc6 25.Be3 Nxd4 26.Bxd4 Bxc5 27.Bxc5
  ²  (0.66)   Depth: 10/30   00:00:07  4711kN
21...Bc6 22.Qb3 b5 23.Nc5 Bxf3 24.Rxf3 Nc6 25.Be3 Nxd4 26.Bxd4 Bxc5 27.Bxc5
  ²  (0.66)   Depth: 11/31   00:00:12  7818kN
21...Bc6!
  ²  (0.34)   Depth: 12/32   00:00:22  14722kN
21...Bc6! 22.Qb3 b5 23.Nc5 Bxf3 24.Rxf3 Nc6 25.Qd5 Nxd4 26.Qxd4 Bxc5 27.Qd3
  =  (0.19)   Depth: 12/32   00:00:27  18153kN
21...Bc6 22.Qb3 b5 23.Nc5 Bxf3 24.Rxf3 Nc6 25.Be3 Bxc5 26.dxc5 Rxe5 27.Rd1
  ²  (0.28)   Depth: 13/32   00:01:10  41785kN
21...Bc6 22.Qa2 Bxf3 23.gxf3 Rxc3 24.Nxc3 Qb6 25.f4 h6 26.Bh4 Qxd4 27.e6
  ²  (0.44)   Depth: 14/35   00:03:27  133934kN
21...Bc6 22.Qa2 h6 23.Bf4 Bxa4 24.e6 b6 25.Ne5 Kh7 26.exf7
  ²  (0.37)   Depth: 15/37   00:09:40  388117kN
21...Bc6 22.Qa2 Bxf3 23.gxf3 Rxc3 24.Nxc3 Qb6 25.f4 h6 26.Bh4 Qxd4 27.e6
  ²  (0.59)   Depth: 16/41   00:21:48  885416kN
21...Bc6 22.Qa2 Bxf3 23.gxf3 h6 24.Be3 f4 25.Rxc8 Rxc8 26.Bxf4 b5
  ²  (0.53)   Depth: 17/42   00:51:38  2131220kN
21...Bc6 22.Qa2 Bxf3 23.gxf3 h6 24.Be3 f4 25.Rxc8 Rxc8 26.Bxf4 b5 27.Nc3
  ²  (0.56)   Depth: 18/43   02:16:16  5650834kN
21...Bc6 22.Qa2 Bxf3 23.gxf3 h6 24.Be3 f4 25.Bxf4 Qxd4 26.Re4 Qd7 27.Qb3
  ²  (0.50)   Depth: 19/48   05:47:55  14531042kN
21...Bc6 22.Qa2 Bxf3 23.gxf3 h6 24.Be3 f4 25.Bxf4 Qxd4 26.Re4 Qd7 27.Qb3
  ²  (0.47)   Depth: 20/49   17:15:03  43600062kN

(Blass, Tel-aviv 06.10.2001)

After 21...h6 22.Rxc8

Zarkov4.5T - Yace
[D]1nR1rbk1/qp1b1pp1/7p/p2QPpB1/N2P4/P4N2/1P3PPP/4R1K1 b - - 0 1

Analysis by Deep Fritz:

22...Rxc8!
  +-  (4.47)   Depth: 1/2   00:00:00
22...Rxc8!
  +-  (1.59)   Depth: 1/2   00:00:00
22...Rxc8!
  ±  (1.25)   Depth: 2/7   00:00:00
22...Rxc8! 23.e6 Bxe6
  ²  (0.62)   Depth: 2/14   00:00:00
22...Rxc8 23.e6 Bxe6
  ²  (0.62)   Depth: 3/7   00:00:00
22...Rxc8!
  ²  (0.31)   Depth: 4/10   00:00:00  1kN
22...Rxc8! 23.Bxh6 Be6 24.Qb5 gxh6
  ³  (-0.34)   Depth: 4/16   00:00:00  3kN
22...Rxc8--
  =  (-0.03)   Depth: 5/16   00:00:00  9kN
22...Rxc8-- 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6
  ²  (0.31)   Depth: 5/19   00:00:00  13kN
22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6 26.Qxe6
  ²  (0.31)   Depth: 6/18   00:00:00  22kN
22...Rxc8 23.e6 Bxa4 24.exf7+ Kh8 25.Bd2 Bc2 26.Bxa5
  =  (0.19)   Depth: 7/22   00:00:00  91kN
22...Rxc8 23.e6 Bxa4 24.exf7+ Kh8 25.Qxf5 Bd7 26.Qg6 Nc6
  ²  (0.44)   Depth: 8/23   00:00:00  183kN
22...Rxc8--
  ±  (0.75)   Depth: 9/25   00:00:00  325kN
22...Rxc8-- 23.e6 fxe6 24.Rxe6 Kh8 25.Qe5 Bxe6 26.Qxe6 Rc2 27.Qxf5
  ±  (0.84)   Depth: 9/25   00:00:00  482kN
22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Qe5 Bxe6 26.Qxe6 Rc6 27.Qxf5 Bd6
  ±  (0.72)   Depth: 10/28   00:00:02  1532kN
22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Qe5 Bxe6 26.Qxe6 Rc6 27.Qxf5 Bd6 28.Bf4
  ±  (0.72)   Depth: 11/30   00:00:04  3169kN
22...Rxc8--
  ±  (1.03)   Depth: 12/32   00:00:07  4747kN
22...Rxc8-- 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6 26.Qxe6 Rc6 27.Qxf5 Bxa3
  ±  (1.06)   Depth: 12/32   00:00:09  6559kN
22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6 26.Qxe6 Rc6 27.Qe8 Qxb6 28.Qxf8+
  ±  (0.97)   Depth: 13/32   00:00:26  17509kN
22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6 26.Qxe6 Rc6 27.Qe8 Qxb6 28.Qxf8+
  ±  (1.00)   Depth: 14/36   00:01:20  53103kN
22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Qe5 Bxe6 26.Qxe6 Rc6 27.Qe8 Kg8 28.Ne5
  ±  (1.16)   Depth: 15/35   00:03:15  131962kN

(Blass, Tel-aviv 06.10.2001)

Uri



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.