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Subject: Re: My second game against Genius classic7 ......marshall attack refuted?

Author: Uri Blass

Date: 17:13:36 12/22/02

Go up one level in this thread


On December 22, 2002 at 19:19:53, Uri Blass wrote:

>On December 22, 2002 at 14:07:36, robert flesher wrote:
>
>>Well! i have found a program i truely enjoy to play as it plays into all my
>>opening novelties:) i will admit that the novelty in this game is not mine but
>>its a great way to refute this variation of the marshall. Enjoy! ....Cheers~
>>[Event "?"]
>>[Site "?"]
>>[Date "2002.12.22"]
>>[Round "?"]
>>[White "Robert"]
>>[Black "Genius7"]
>>[Result "1-0"]
>>[ECO "C89"]
>>
>>1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3
>>d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3 Qh3
>>15. Be3 Bg4 16. Qd3 Rae8 17. Nd2 Re6 18. a4 f5 19. axb5!! not found in any book
>>but strong as hell ..
>
>This move is found by Deep Fritz on p850(64 mg hash) at depthes 10,12,14
>It proves that trusting existing books may be a mistake because programs may
>find better moves by search.
>
>
>Robert - Genius7
>5rk1/6pp/p1pbr3/1p1n1p2/P2P2b1/1BPQB1Pq/1P1N1P1P/R3R1K1 w - f6 0 1
>
>Analysis by Deep Fritz:
>
>19.Bxd5 cxd5 20.axb5
>  ±  (1.19)   Depth: 1/6   00:00:00
>19.Bxd5 cxd5 20.axb5 f4 21.gxf4 Bxf4
>  ±  (1.16)   Depth: 4/13   00:00:00  3kN
>19.Bxd5 cxd5 20.axb5 f4 21.gxf4 Bxf4
>  ±  (1.16)   Depth: 4/13   00:00:00  3kN
>19.Bxd5 cxd5 20.axb5 f4 21.gxf4 Bxf4
>  ±  (1.16)   Depth: 4/13   00:00:00  3kN
>19.Bxd5--
>  ±  (0.84)   Depth: 5/19   00:00:00  18kN
>19.Bxd5-- cxd5 20.axb5 f4 21.gxf4 Bxf4 22.Nf1
>  ±  (0.72)   Depth: 5/24   00:00:00  23kN
>19.Bg5!
>  ±  (0.75)   Depth: 5/25   00:00:00  53kN
>19.Bg5! Rxe1+ 20.Rxe1 Qh5 21.f4 bxa4
>  ±  (0.78)   Depth: 5/25   00:00:00  61kN
>19.Bg5 Rxe1+ 20.Rxe1 Qh5 21.f4 Re8 22.Rxe8+ Qxe8
>  ±  (0.91)   Depth: 6/26   00:00:00  131kN
>19.Bg5--
>  ²  (0.59)   Depth: 7/26   00:00:00  450kN
>19.Bg5-- f4 20.Rxe6 Bxe6 21.axb5 fxg3 22.fxg3 axb5
>  ²  (0.56)   Depth: 7/28   00:00:00  592kN
>19.Qf1!
>  ²  (0.59)   Depth: 7/28   00:00:01  1087kN
>19.Qf1! Qxf1+ 20.Nxf1 Kf7 21.axb5 axb5 22.Ra6 Rc8 23.Nd2
>  ±  (0.78)   Depth: 7/28   00:00:01  1286kN
>19.Qf1 Qxf1+ 20.Nxf1 Kf7 21.axb5 axb5 22.Ra7+ Kg6 23.Ra6 Rc8 24.Nd2
>  ±  (0.78)   Depth: 8/27   00:00:02  1600kN
>19.Qf1 Qxf1+ 20.Nxf1 Kf7 21.axb5 axb5 22.Ra7+ Kg6 23.Ra6 Rc8 24.Nd2 Kf6
>  ±  (0.78)   Depth: 9/29   00:00:04  3384kN
>19.Bg5!
>  ±  (0.81)   Depth: 9/30   00:00:06  4220kN
>19.Bg5! f4 20.Rxe6 Bxe6 21.axb5 fxg3 22.fxg3 axb5 23.Ra6
>  ±  (0.91)   Depth: 9/30   00:00:08  5546kN
>19.Bg5--
>  ²  (0.59)   Depth: 10/32   00:00:12  9268kN
>19.Bg5--
>  ²  (0.59)   Depth: 10/32   00:00:13  10031kN
>19.axb5!
>  ²  (0.63)   Depth: 10/32   00:00:16  12163kN
>19.axb5! f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxa6 Ra8 23.Bc4 Bxd2 24.Qxd2 Ra7
>  ²  (0.69)   Depth: 10/32   00:00:17  13145kN
>19.Qf1!
>  ±  (0.72)   Depth: 10/32   00:00:20  14648kN
>19.Qf1! bxa4 20.Rxa4 f4 21.Bxf4 Qxf1+ 22.Rxf1 Bxf4 23.gxf4 Re2 24.Nc4 Rb8
>  ±  (0.78)   Depth: 10/32   00:00:23  16947kN
>19.Qf1 bxa4 20.Rxa4 f4 21.Qxh3 Bxh3 22.Rxa6 fxe3 23.fxe3 Rc8 24.e4 Kf7
>  ²  (0.63)   Depth: 11/33   00:00:32  23828kN
>19.Qf1 Qh5 20.f4 Kh8 21.Bxd5 cxd5 22.axb5 Qe8 23.Qd3 Qxb5 24.Qxb5 axb5
>  ²  (0.69)   Depth: 12/34   00:01:27  64342kN
>19.axb5!
>  ±  (0.72)   Depth: 12/34   00:01:47  80440kN
>19.axb5! f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxa6 Bxd2 23.Qxd2 Qf5 24.Bc4 Ra8
>  ±  (0.88)   Depth: 12/34   00:02:03  92649kN
>19.axb5 f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxa6 Qg4 23.a7 Ra8 24.Qc4
>  ±  (0.81)   Depth: 13/36   00:03:22  155647kN
>19.Qf1!
>  ±  (0.84)   Depth: 13/38   00:04:26  204252kN
>19.Qf1! Qh5 20.f4 Kh8 21.Bxd5 cxd5 22.axb5 Qe8 23.Kf2 axb5
>  ±  (0.88)   Depth: 13/39   00:05:10  236807kN
>19.Qf1 Qh5 20.f4 bxa4 21.Rxa4 Rb8 22.Bf2 Re2 23.Rxa6 Rxd2 24.Bxd5+ cxd5
>  ±  (0.75)   Depth: 14/36   00:07:38  348564kN
>19.axb5!
>  ±  (0.78)   Depth: 14/39   00:09:23  434272kN
>19.axb5! f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxa6 Bxd2 23.Qxd2 Nc7 24.Bxe6+ Qxe6
>  ±  (0.88)   Depth: 14/40   00:11:39  537347kN
>
>(blass, tel-aviv 23.12.2002)


19.axb5 f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxa6 Bxd2 23.Qxd2 Nb6 24.Bxe6+ Qxe6
  ±  (0.94)   Depth: 15/40   00:26:02  1205346kN
19.axb5 f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxa6 Bxd2 23.Qxd2 Bg4 24.f4 Ra8
  ±  (0.94)   Depth: 16/42   00:57:10  2647498kN

(blass, tel-aviv 23.12.2002)

Deep Fritz does not change it's mind at depth 15 and the score does not go down
at depth 16 so it seems to converge to 19.axb5.

I doubt if it is right and I believe that Genius simply did not find the best
moves for black.

23...Nf4 does not seem to me a good move because it seems to me that black needs
to keep the bishop for mate threats.

Uri

 >
>
>Uri



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