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Subject: Re: A very difficult tactical position solved by chessmaster 8000(Test)

Author: Thom Perry

Date: 04:33:36 05/18/02

Go up one level in this thread


On May 17, 2002 at 16:41:08, ALI MIRAFZALI wrote:

>On May 17, 2002 at 16:36:19, Roy Eassa wrote:
>
>>On May 17, 2002 at 16:34:33, ALI MIRAFZALI wrote:
>>
>>>On May 17, 2002 at 16:28:22, Roy Eassa wrote:
>>>
>>>what program are you useing?
>>
>>
>>I analyzed using myself and with the help of Fritz 6.  (Going up and down
>>branches manually...)  Was not trying to get the computer to solve the problem,
>>only to help me analyze to see the truth of the position as well as possible in
>>limited time.
>I lost my Fritz6 CD some time ago so I cant campare Chessmaster with fritz here
>but I remmeber from many tests that fritz6 (due to the NULL MOVE pruning does
>not see many sacrificial lines.Does it come with the CM 8000 line here?

That is not necessarily true.  Fritz 6 finds this sacrificial line easily on a
PIII/866 using 256MB:

New position
3rr1k1/1b1q1p1p/p2b1npB/2pP4/1p2n3/4N1P1/PPQ1NPBP/R2R2K1 b - - 0 1

Analysis by Fritz 6:

1...Bxd5--
  ±  (0.75)   Depth: 1/5   00:00:00
1...Bxd5-- 2.Nxd5
  +-  (2.28)   Depth: 1/5   00:00:00
1...Nxd5!
  +-  (2.22)   Depth: 1/5   00:00:00
1...Nxd5! 2.Nxd5
  +-  (1.97)   Depth: 1/5   00:00:00
1...Nxf2!
  +-  (1.72)   Depth: 1/5   00:00:00
1...c4!
  ±  (1.28)   Depth: 1/13   00:00:00
1...c4! 2.Qxc4
  ²  (0.31)   Depth: 1/13   00:00:00
1...Re7!
  =  (0.00)   Depth: 1/13   00:00:00
1...Re7!
  ³  (-0.34)   Depth: 1/13   00:00:00
1...Re7 2.Rac1
  =  (-0.22)   Depth: 2/9   00:00:00
1...Re5!
  =  (-0.25)   Depth: 2/9   00:00:00
1...Ng4!
  ³  (-0.28)   Depth: 2/15   00:00:00
1...Ng4 2.Bxe4 Nxh6
  ³  (-0.28)   Depth: 3/15   00:00:00  1kN
1...Ng4 2.Nxg4 Qxg4 3.f3 Qh5 4.fxe4 Qxh6
  =  (-0.13)   Depth: 4/13   00:00:00  4kN
1...g5!
  =  (-0.16)   Depth: 4/18   00:00:00  9kN
1...g5! 2.h3
  =  (-0.22)   Depth: 4/18   00:00:00  11kN
1...g5 2.h3 Re7 3.Rac1 Rde8
  =  (-0.19)   Depth: 5/23   00:00:00  27kN
1...g5 2.h3 Re7 3.Re1 Rde8 4.Rad1
  =  (-0.13)   Depth: 6/28   00:00:00  73kN
1...g5 2.Rac1 Re7 3.Nc4 Nxf2 4.Kxf2 Ng4+ 5.Kf1 Nxh6 6.Nxd6
  =  (-0.09)   Depth: 7/28   00:00:00  358kN
1...g5 2.Bxe4 Nxe4 3.f3 Nxg3 4.Nxg3 Rxe3 5.Bxg5 b3 6.axb3
  =  (-0.03)   Depth: 8/28   00:00:01  741kN
1...g5--
  ²  (0.28)   Depth: 9/26   00:00:01  1162kN
1...g5-- 2.f3 Nc3 3.Nxc3 bxc3 4.Qxc3 Be5 5.Qxc5 Bxb2 6.Rab1
  ±  (1.00)   Depth: 9/29   00:00:02  1698kN
1...Ng4!
  ±  (0.97)   Depth: 9/29   00:00:02  1882kN
1...Ng4! 2.Nxg4 Qxg4 3.f3 Qh5 4.Bf4 Ng5 5.Bxd6 Rxd6 6.g4
  =  (0.19)   Depth: 9/29   00:00:03  2241kN
1...Nxf2!
  =  (0.00)   Depth: 9/30   00:00:05  3615kN
1...Nxf2 2.Kxf2 Rxe3 3.Bxe3 Ng4+ 4.Kf3 Nxh2+ 5.Kf2 Ng4+ 6.Kf3
  =  (0.00)   Depth: 10/29   00:00:06  4140kN
1...Nxf2 2.Kxf2 Rxe3 3.Bxe3 Ng4+ 4.Kf3 Nxh2+ 5.Kf2 Ng4+ 6.Kf3
  =  (0.00)   Depth: 11/31   00:00:13  9007kN
1...Ng4!
  =  (0.12)   Depth: 11/31   00:00:16  11061kN
1...Ng4! 2.Nxg4 Qxg4 3.f3 Qh5 4.fxe4 Qxh6 5.Nf4 Bc8 6.Rac1
  =  (-0.09)   Depth: 11/31   00:00:20  13454kN
1...Ng4 2.Nxg4 Qxg4 3.f3 Qh5 4.Bf4 Nf6 5.Bxd6 Rxd6 6.Nf4
  =  (0.12)   Depth: 12/32   00:00:28  18999kN
1...Ng4 2.Nxg4 Qxg4 3.f3 Qh5 4.Bf4 Nf6 5.Bxd6 Rxd6 6.Nf4
  =  (0.25)   Depth: 13/35   00:00:58  40548kN
1...Nxf2!
  =  (0.22)   Depth: 13/37   00:01:48  75536kN
1...Nxf2! 2.Kxf2 Rxe3 3.Kxe3 Ng4+ 4.Kd2 Nxh6 5.Kc1 Ng4 6.Bh3
  =  (0.19)   Depth: 13/37   00:01:59  82994kN
1...Nxf2!
  =  (-0.13)   Depth: 14/35   00:05:08  217620kN
1...Nxf2 2.Kxf2 Rxe3 3.Bxe3 Ng4+ 4.Kf3 Nxh2+ 5.Kf2 Ng4+ 6.Kf3
  =  (-0.25)   Depth: 15/42   00:10:31  453218kN

(Perry, Accokeek 18.05.2002)




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