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Subject: Re: A test position for chess programs

Author: Mogens Larsen

Date: 07:34:16 10/17/00

Go up one level in this thread


On October 17, 2000 at 02:13:56, Uri Blass wrote:

>[D]1k1r3r/p1pq1b1p/1pPbpp2/8/Q2P1N2/P3BP2/B5PP/2R3K1 b - - 0 1
>
>The problem is to find Qc8.
>The position could happen in the game Tiger-Nimzo after 25.Rxc6 Nxc6 26.bxc6

Using Athlon 800, 16Mb hash I get the following.

New position
1k1r3r/p1pq1b1p/1pPbpp2/8/Q2P1N2/P3BP2/B5PP/2R3K1 b - - 0 1

Analysis by Gandalf 4.32f:

1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.g3
  -+  (-3.61)   Depth: 2   00:00:00
1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.Bg3 Rd2 5.Bc4
  -+  (-3.87)   Depth: 2   00:00:00
1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.Bg3 Rd2 5.Bc4
  -+  (-3.87)   Depth: 2   00:00:00
1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.Bg3 Rd2 5.Bc4
  -+  (-3.87)   Depth: 5   00:00:00
1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.Bg3 Rd2 5.Bc4
  -+  (-3.87)   Depth: 5   00:00:00
1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.Bg3 Rd2 5.Bc4
  -+  (-3.87)   Depth: 5   00:00:00  10kN
1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.Bh6 Rhd8 5.Re1 Rd1 6.Kf2
  -+  (-4.08)   Depth: 6   00:00:00  26kN
1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.Bg3 Rd2 5.Bc4 Rhd8 6.Re1
  -+  (-4.00)   Depth: 7   00:00:00  78kN
1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.Bg3 Rhd8 5.Bb3 Rd3 6.Bc2
  -+  (-3.98)   Depth: 8   00:00:01  150kN
1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.Bh6 Rg8 5.Bc4 Rd6 6.Bf4
  -+  (-4.03)   Depth: 9   00:00:02  350kN
1...Bxf4 2.Bxf4 Qxd4+ 3.Qxd4 Rxd4 4.Bh6 Rd3 5.a4 Ra3 6.Bb1
  -+  (-4.16)   Depth: 10   00:00:05  850kN
1...Bxf4 2.cxd7 Bxe3+ 3.Kh1 Bxc1 4.Qc6 a6 5.Bc4 b5 6.Qxa6
  =  (-0.01)   Depth: 11   00:00:19  3650kN
1...Qc8
  =  (-0.05)   Depth: 11   00:00:49  8700kN
1...Qc8 2.Nd3 Rdg8 3.Nc5 Ka8 4.Nd7 Rg6 5.Bc4 Qg8 6.g3
  µ  (-1.20)   Depth: 11   00:03:51  38450kN
1...Qc8 2.Nd3 Bg6 3.Nc5 Bxc5 4.dxc5 Rd3 5.cxb6 axb6 6.Re1
  ³  (-0.35)   Depth: 12   00:06:31  64100kN

Best wishes...
Mogens



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