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Subject: Re: The next test position from Fisher-Geller - probably even more difficult

Author: Ernst Walet

Date: 23:14:04 09/16/01

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On September 16, 2001 at 15:55:14, Peter Berger wrote:

>The logical one following the discussion:
>
>How long does it take your program to find 1...Ng4! ? It's easy to verify that
>everything else besides 1...Nxe4 and 1...Ng4 loses . Nxe4 loses also ( read the
>initial post) - so Ng4 is the only move . It seems to lead to a rather equal
>position, too btw.
>
>Regards,
>
>pete
>
>[D] 3r1r1k/p3bPpp/2bp1n2/5R2/1q1BP3/1Bp5/PPP3PP/1K1R1Q2 b - - 0 1

The result of Hiarcs 7.32, it sticks with Nxe4 after 2 seconds.

New position
3r1r1k/p3bPpp/2bp1n2/5R2/1q1BP3/1Bp5/PPP3PP/1K1R1Q2 b - - 0 1

Analysis by Hiarcs 7.32:

1...cxb2 2.c3
  -+  (-1.95)   Depth: 1   00:00:00
1...cxb2 2.Rg5
  -+  (-2.22)   Depth: 2/7   00:00:00
1...cxb2 2.Bxb2 Nxe4
  -+  (-2.36)   Depth: 2/11   00:00:00
1...cxb2 2.Rxf6
  -+  (-1.98)   Depth: 3/12   00:00:00
1...cxb2 2.Rxf6
  -+  (-1.98)   Depth: 3/17   00:00:00
1...cxb2 2.Rxf6
  -+  (-1.68)   Depth: 4/17   00:00:00
1...cxb2 2.Rxf6 Bb5 3.Qf3 Bxf6 4.Bxf6 Rb8 5.Bxb2
  ²  (0.67)   Depth: 4/17   00:00:00
1...Ng4 2.Bxc3 Qb7 3.Qf4 Nf6 4.Ba5
  =  (0.23)   Depth: 4/17   00:00:01
1...Nd7 2.Bxc3 Qxe4 3.Re1 Qh4
  =  (0.16)   Depth: 4/19   00:00:02
1...Nxe4 2.a3
  -+  (-2.27)   Depth: 4/19   00:00:02
1...Nxe4 2.a3
  -+  (-2.27)   Depth: 4/19   00:00:02
1...Nxe4 2.a3
  -+  (-1.84)   Depth: 5/19   00:00:03  73kN
1...Nxe4 2.a3
  -+  (-1.84)   Depth: 5/19   00:00:03  99kN
1...Nxe4 2.a3
  -+  (-2.09)   Depth: 6/21   00:00:06  288kN
1...Nxe4 2.a3 Qb7 3.Qf4 cxb2 4.Kxb2 Nf6 5.Ra5 a6
  -+  (-2.29)   Depth: 6/23   00:00:08  357kN
1...Nxe4 2.a3
  -+  (-2.04)   Depth: 7/23   00:00:10  480kN
1...Nxe4 2.a3 Qb7 3.Qf4 cxb2 4.Qh6
  -+  (-2.02)   Depth: 7/25   00:00:25  1333kN
1...Nxe4 2.a3
  -+  (-1.77)   Depth: 8/25   00:00:34  1809kN
1...Nxe4 2.a3 Qb7 3.Qf4 Ba4 4.Qg4 Bf6
  -+  (-1.74)   Depth: 8/27   00:01:34  4884kN
1...Nxe4 2.Qf4 cxb2 3.Kxb2 Rb8 4.c3 Qc4 5.Qf1 Qa4
  -+  (-1.94)   Depth: 9/27   00:06:49  21258kN
1...Nxe4 2.Qf4
  -+  (-1.69)   Depth: 10/29   00:11:30  35597kN
1...Nxe4 2.Qf4 cxb2 3.Rh5 Nf6 4.Rf5 Bxg2 5.Rxf6 d5 6.Bxb2
  =  (-0.20)   Depth: 10/30   00:37:04  111755kN
1...Nxe4 2.Qf4
  =  (0.05)   Depth: 11/30   01:38:48  292665kN
1...Nxe4 2.Qf4 cxb2 3.Rh5 Nf6 4.Rf5 a5 5.Rxf6 Be4 6.Re6
  =  (0.10)   Depth: 11/30   02:21:25  426173kN
1...Nxe4 2.Qf4 cxb2 3.Rh5 Nf6 4.Rh6 Ne4 5.Qf5 Ng5 6.Rh5 Be4 7.Rxg5 Qxd4 8.Rxd4
Bxf5 9.Rxf5 Bf6
  =  (0.17)   Depth: 12/31   06:04:36  1107997kN

(PIII-500E, 192MB hash, 3 and 4 piece EGTB's, 17.09.2001)


Ernst.




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