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Subject: Re: Does any program find Nigel Shorts 31. Kh2!

Author: Uri Blass

Date: 20:42:32 08/13/02

Go up one level in this thread


On August 13, 2002 at 19:04:59, Mike S. wrote:

>On August 13, 2002 at 17:05:24, Chris wrote:
>
>>4rrk1/1bpR1p2/1pq1pQp1/p3P2p/P1PR3P/5N2/2P2PP1/6K1 w - a6 0 31
>>Does any program find Shorts 31. Kh2?
>>
>>31.Kh2! Rc8 32.Kg3 Rce8 33.Kf4 Bc8 34.Kg5 with the idea Kh6 and mate..
>>
>>The idea of mating with the king in the middle game is very unusual, but maybe
>>the programs can find it anyway by using brute force?

I tried deep fritz for some hours(selectivity=0,p850,64 mbytes) with no success
so maybe black has a defence after Kh2.

New position
[D]4rrk1/1bpR1p2/1pq1pQp1/p3P2p/P1PR3P/5N2/2P2PP1/6K1 w - a6 0 1

Analysis by Deep Fritz:

1.Qxg6+--
  -+  (-4.37)   Depth: 1/3   00:00:00
1.Qxg6+-- fxg6
  -+  (-7.59)   Depth: 1/3   00:00:00
1.Rxc7!
  -+  (-5.34)   Depth: 1/5   00:00:00
1.Rxc7! Qxc7
  -+  (-3.19)   Depth: 1/5   00:00:00
1.Rxf7!
  -+  (-3.09)   Depth: 1/5   00:00:00
1.Rxf7! Rxf7
  -+  (-2.56)   Depth: 1/7   00:00:00
1.c5!
  -+  (-2.47)   Depth: 1/7   00:00:00
1.c5! Qxc5
  ²  (0.66)   Depth: 1/7   00:00:00
1.c5 Qxc5
  ²  (0.66)   Depth: 2/5   00:00:00
1.c5 bxc5 2.Rd3 Qxa4
  ²  (0.38)   Depth: 3/17   00:00:00
1.Rd3!
  ²  (0.41)   Depth: 3/17   00:00:00  1kN
1.c3!
  ²  (0.44)   Depth: 3/17   00:00:00  2kN
1.c3! Qxa4 2.Rxc7 Bxf3
  ²  (0.56)   Depth: 3/17   00:00:00  2kN
1.c3 Qxa4 2.Rxc7 Bxf3 3.Qxf3
  ²  (0.56)   Depth: 4/12   00:00:00  3kN
1.c3 Bc8 2.Re7 Rxe7 3.Qxe7 Bb7
  ²  (0.31)   Depth: 5/18   00:00:00  11kN
1.Ne1!
  ²  (0.34)   Depth: 5/20   00:00:00  20kN
1.Ne1! Bc8 2.R7d5 Bb7
  ²  (0.38)   Depth: 5/20   00:00:00  20kN
1.Ne1 Rc8 2.c3 Qxa4 3.c5 Qc6
  ²  (0.28)   Depth: 6/17   00:00:00  36kN
1.Ne1 Bc8 2.Re7 Rxe7 3.Qxe7 Bb7 4.c3 Qxa4 5.Qxc7
  =  (0.13)   Depth: 7/19   00:00:00  175kN
1.c3!
  =  (0.16)   Depth: 7/19   00:00:00  199kN
1.c3! Rc8 2.Kh2 Qxa4
  =  (0.19)   Depth: 7/25   00:00:00  228kN
1.c3 Bc8 2.Re7 Bb7 3.Rxe8 Rxe8 4.c5 Qxc5 5.Rd7
  =  (0.19)   Depth: 8/27   00:00:01  648kN
1.c3 Bc8 2.Re7 Rxe7 3.Qxe7 Bb7 4.c5 Qxc5 5.Qxc5 bxc5 6.Rd7
  =  (0.06)   Depth: 9/28   00:00:03  2174kN
1.Ne1!
  =  (0.09)   Depth: 9/29   00:00:04  2649kN
1.Ne1! Bc8 2.Re7 Rxe7 3.Qxe7 Bb7 4.c5 bxc5 5.Rc4 Rb8
  =  (0.19)   Depth: 9/29   00:00:05  2957kN
1.Ne1 Bc8 2.Re7 Ba6 3.c5 bxc5 4.Rdd7 Rxe7 5.Rxe7 Qxa4 6.Rxc7
  =  (0.00)   Depth: 10/28   00:00:12  7448kN
1.Rd3!
  =  (0.03)   Depth: 10/30   00:00:19  11358kN
1.Rd3! Bc8 2.g4 Qxa4 3.gxh5 Qxc2 4.h6 Qc1+ 5.Kg2 Qxh6 6.Rxc7
  =  (0.19)   Depth: 10/31   00:00:26  15063kN
1.Qf4!
  =  (0.22)   Depth: 10/31   00:00:40  23033kN
1.Qf4! Qxa4 2.Ng5 Qc6 3.f3 Qc5 4.Nxf7 Re7
  =  (0.25)   Depth: 10/31   00:00:42  24385kN
1.Qf4 Qxa4 2.Ng5 Qc6 3.f3 Qc5 4.Nxf7 Re7 5.Nh6+ Kg7 6.Qe3 a4
  =  (0.16)   Depth: 11/33   00:01:08  37963kN
1.Qf4 Kg7 2.Rd2 Bc8 3.R7d4 Bb7 4.c5 Qxc5
  =  (0.22)   Depth: 12/34   00:03:40  124158kN
1.Rd3!
  =  (0.25)   Depth: 12/35   00:05:22  179827kN
1.Rd3! Bc8 2.g4 Qxc4 3.gxh5 Qg4+ 4.Kh2 Qxh5 5.Rxc7 Ba6 6.Rdd7
  ²  (0.69)   Depth: 12/36   00:06:44  226048kN
1.Rd3 Bc8 2.g4 Qxc4 3.gxh5 Qg4+ 4.Kh2 Qxh5 5.Rxc7 Ba6 6.Rdd7
  ±  (0.97)   Depth: 13/36   00:13:40  437742kN
1.Rd3 Rc8 2.Kf1 Qe4 3.Ng5 Qf5 4.Qxf5 gxf5 5.Re7 Ba6 6.Rdd7 Bxc4+
  ±  (0.75)   Depth: 14/38   00:46:39  1553732kN
1.Ne1!
  ±  (0.78)   Depth: 14/38   01:26:43  2842128kN
1.Ne1 Bc8 2.g4 Qxd7 3.Rxd7 Bxd7 4.gxh5 gxh5 5.Qg5+ Kh8 6.Qxh5+ Kg7
  ±  (0.78)   Depth: 15/39   02:46:14  5310505kN
1.Rd3!
  ±  (0.81)   Depth: 15/43   03:17:51  6409524kN
1.Rd3! Rc8 2.R7d4 Rce8 3.g4 Qxa4 4.gxh5 Qxc2 5.Kg2
  ±  (0.94)   Depth: 15/43   04:01:11  7954196kN

(blass, tel-aviv 14.08.2002)


Uri



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