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Subject: Re: Find a mate.

Author: pavel

Date: 08:30:51 08/03/02

Go up one level in this thread


On August 03, 2002 at 10:42:17, Manfred Rosenboom wrote:

>On August 03, 2002 at 08:03:46, leonid wrote:
>
>>...
>>If above position is too easy for You then try other one. In it my program was
>>very slow and I don't know shortest mate. By selective mate was found in 10.
>
>
>>[D]2bqkb2/1r4rR/nPPPPPPn/1pNppNp1/bNp2pNb/8/8/7K w - -
>
>Yace 0.99.56 indicates at least mate in 9:


I get it in 11 sec for yace:
New game
2bqkb2/1r4rR/nPPPPPPn/1pNppNp1/bNp2pNb/8/8/7K w - - 0 1

Analysis by Yace 0.99.56:

1.Rxg7 Rxg7 2.fxg7
  -+  (-16.22)   Depth: 1   00:00:00
1.Nxg7+ Bxg7 2.cxb7 Bxe6 3.b8Q Nxb8 4.fxg7
  -+  (-16.15)   Depth: 1   00:00:00
1.Nxg7+ Bxg7 2.cxb7
  -+  (-14.62)   Depth: 1   00:00:00
1.d7+ Rbxd7 2.exd7+ Rxd7 3.cxd7+ Bxd7
  -+  (-14.59)   Depth: 1   00:00:00
1.d7+ Rbxd7 2.exd7+ Rxd7 3.cxd7+ Bxd7 4.Rxd7
  -+  (-11.04)   Depth: 1   00:00:00
1.d7+ Rbxd7 2.exd7+ Rxd7 3.cxd7+ Bxd7 4.Rxd7
  -+  (-11.04)   Depth: 1   00:00:00
1.d7+ Rbxd7 2.cxd7+ Bxd7 3.fxg7 Qb8 4.gxf8Q+ Kxf8 5.exd7 Nxc5 6.d8Q+ Qxd8
7.Ngxh6 Qxb6
  -+  (-10.63)   Depth: 2   00:00:00
1.d7+ Qxd7 2.exd7+ Bxd7 3.fxg7 Be6
  -+  (-9.62)   Depth: 2   00:00:00
1.d7+ Rbxd7 2.cxd7+ Bxd7 3.f7+ Nxf7 4.exd7+ Qxd7 5.Nxd7 Rxh7
  -+  (-9.11)   Depth: 2   00:00:00
1.d7+ Rbxd7 2.cxd7+ Bxd7 3.f7+ Nxf7 4.exd7+ Qxd7 5.Nxd7 Rxh7
  -+  (-9.11)   Depth: 2   00:00:00
1.d7+ Qxd7 2.exd7+ Bxd7 3.Nxg7+ Kd8
  -+  (-8.68)   Depth: 3   00:00:00
1.d7+ Rgxd7 2.exd7+ Rxd7 3.cxd7+ Qxd7 4.f7+ Kd8
  -+  (-7.88)   Depth: 3   00:00:00
1.Nxg7+ Rxg7 2.d7+ Qxd7 3.cxd7+ Kd8 4.dxc8Q+ Kxc8 5.fxg7 Nxb4
  -+  (-7.87)   Depth: 3   00:00:00
1.Nxg7+ Bxg7 2.d7+ Bxd7 3.exd7+ Kf8 4.Ne6+ Kg8 5.Nxd8 Rxb6 6.fxg7 Nxg4 7.Nxd5
  -+  (-7.68)   Depth: 3   00:00:00
1.Nxg7+ Bxg7 2.d7+ Bxd7 3.exd7+ Rxd7 4.cxd7+ Qxd7
  -+  (-5.75)   Depth: 3   00:00:00
1.Nxg7+ Bxg7 2.d7+ Bxd7 3.exd7+ Rxd7 4.cxd7+ Qxd7
  -+  (-5.75)   Depth: 3   00:00:00
1.Nxg7+ Bxg7 2.d7+ Bxd7 3.exd7+ Rxd7 4.cxd7+ Qxd7 5.Nxd7 Nxg4 6.Nxa6
  -+  (-5.75)   Depth: 4   00:00:00
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Kd8 4.dxc8Q+ Kxc8 5.fxg7 Bxg7
  -+  (-5.74)   Depth: 4   00:00:00
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Kd8 4.dxc8Q+ Kxc8 5.fxg7 Bxg7
  -+  (-5.35)   Depth: 4   00:00:00
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Rxd7 4.f7+ Rxf7 5.gxf7+ Nxf7 6.Nf6+ Kd8
  -+  (-5.04)   Depth: 4   00:00:00
1.f7+ Nxf7 2.d7+ Rxd7 3.cxd7+ Qxd7 4.exd7+ Bxd7 5.Nxg7+ Bxg7 6.gxf7+ Kd8 7.f8Q+
Bxf8 8.Nxa4
  -+  (-5.02)   Depth: 4   00:00:01
1.f7+ Rgxf7 2.gxf7+ Nxf7 3.c7 Rxc7 4.bxc7 Qxc7 5.dxc7 Nxc7 6.exf7+ Kd8
  -+  (-4.56)   Depth: 4   00:00:01
1.f7+ Rgxf7 2.gxf7+ Nxf7 3.c7 Rxc7 4.bxc7 Qxc7 5.dxc7 Nxc7 6.exf7+ Kd8
  -+  (-4.56)   Depth: 4   00:00:01
1.f7+ Rgxf7 2.gxf7+ Nxf7 3.cxb7 Bxe6 4.Nxe6 Nxd6 5.Nxd8 Nxf5
  -+  (-4.27)   Depth: 5/24   00:00:02
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.fxg7 Bxg7 5.Nxg7+ Kf8
  -+  (-4.26)   Depth: 5/26   00:00:02
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.fxg7 Bxg7 5.Nxg7+ Kf8
  -+  (-4.16)   Depth: 5/26   00:00:02
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.fxg7 Kd8 5.gxf8Q+ Be8
  -+  (-3.16)   Depth: 5/26   00:00:02
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.fxg7 Bxg7 5.Nxg7+ Kd8 6.Rh8+ Ke7 7.Nxd5+
Kd6
  -+  (-2.15)   Depth: 5/26   00:00:02
1.Nxb7 Bxe6 2.fxg7 Qxd6 3.Nfxd6+ Bxd6 4.g8Q+ Bf8
  -+  (-2.14)   Depth: 5/28   00:00:03
1.Nxb7 Bxe6 2.fxg7 Ng8 3.d7+ Qxd7 4.cxd7+ Bxd7 5.gxf8Q+ Kxf8 6.Rxd7 Nxb4 7.Nxh4
gxh4 8.Nxe5
    (-1.06)   Depth: 5/28   00:00:03
1.Nxb7 Bxe6 2.fxg7 Ng8 3.d7+ Qxd7 4.cxd7+ Bxd7 5.gxf8Q+ Kxf8 6.Rxd7 Nxb4 7.Nxh4
gxh4 8.Nxe5
    (-1.06)   Depth: 5/28   00:00:04
1.Nxb7 Bxe6 2.fxg7 Ng8 3.d7+ Qxd7 4.cxd7+ Kxd7 5.gxf8Q+ Bf7
    (-0.66)   Depth: 6/28   00:00:04  2152kN
1.Nxb7 Bxe6 2.fxg7 Ng8 3.d7+ Qxd7 4.cxd7+ Kxd7 5.gxf8Q+ Bf7
    (0.34)   Depth: 6/28   00:00:05  2361kN
1.Nxb7 Bxe6 2.fxg7 Nxf5 3.d7+ Bxd7 4.Nf6+ Qxf6 5.cxd7+ Kxd7 6.gxf8Q+ Ng7 7.Qxf6
Nxb4 8.Qxg7+ Ke6
  +-  (2.80)   Depth: 6/28   00:00:07  3235kN
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.fxg7 Bxf5 5.Nf6+ Ke7 6.g8Q+ Nf7 7.Nxa4
Kxf6 8.Rxh4
  +-  (2.81)   Depth: 6/28   00:00:07  3429kN
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.fxg7 Be7 5.Nf6+ Kd8 6.Rh8+ Bf8 7.gxf8Q+
Be8
  +-  (5.34)   Depth: 6/28   00:00:09  4416kN
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.fxg7 Bxg7 5.Nxg7+ Kd8 6.Nge6+ Bxe6
7.Nc6+ Ke8 8.Nf6+ Kf8 9.Nxe6#
  +-  (#9)   Depth: 6/30   00:00:11  5923kN
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.fxg7 Bxg7 5.Nxg7+ Kd8 6.Nge6+ Bxe6
7.Nc6+ Ke8 8.Nf6+ Kf8 9.Nxe6#
  +-  (#9)   Depth: 6/30   00:00:20  12776kN
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.fxg7 Bxg7 5.Nxg7+ Kd8 6.Nge6+ Bxe6
7.Nc6+ Ke8 8.Nf6+ Kf8 9.Nxe6#
  +-  (#9)   Depth: 7/30   00:00:28  17799kN

(Mahamood, home 03.08.2002)


chesstiger thinks mate in 11

New game
2bqkb2/1r4rR/nPPPPPPn/1pNppNp1/bNp2pNb/8/8/7K w - - 0 1

Analysis by Chess Tiger 14.0:

1.Nxg7+ Bxg7 2.d7+ Bxd7 3.cxd7+ Rxd7 4.exd7+ Qxd7 5.Nxd7 Nxg4 6.f7+ Kd8 7.Nc6+
Kc8 8.Rxg7
  -+  (-3.50)   Depth: 7   00:00:00  162kN
1.Nxg7+ Bxg7 2.d7+ Bxd7 3.cxd7+ Rxd7 4.exd7+ Qxd7 5.Nxd7 Nxg4 6.fxg7 Nf2+ 7.Kg2
f3+ 8.Kxf3
  -+  (-3.34)   Depth: 8   00:00:02  898kN
1.Nxb7
  -+  (-2.60)   Depth: 8   00:00:07  2467kN
1.Nxb7 Bxe6 2.fxg7 Nc5 3.gxf8Q+ Kxf8 4.Nxd8 Nxf5 5.Nxe6+ Nxe6 6.Rf7+ Ke8 7.Rxf5
  =  (0.08)   Depth: 8   00:00:08  2953kN
1.Nxb7
    (0.98)   Depth: 9   00:00:12  4363kN
1.Nxb7 Bxe6 2.fxg7 Bxf5 3.d7+ Bxd7 4.cxd7+ Qxd7 5.Nf6+ Ke7 6.gxf8Q+ Kxf8 7.Nxd7+
Ke8 8.Nxa6
    (1.14)   Depth: 9   00:00:14  4800kN
1.d7+ Rbxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.fxg7 Bxg7 5.Nxg7+ Kd8 6.Nge6+ Kc8
7.Nbxa6 Bxe6 8.b7+ Kd8
  +-  (11.98)   Depth: 9   00:00:26  9248kN
1.d7+
  +-  (12.88)   Depth: 10   00:00:49  18059kN
1.d7+ Rgxd7 2.cxd7+ Qxd7 3.exd7+ Bxd7 4.Nd6+ Bxd6 5.Rh8+ Bf8 6.g7 Ng8 7.Rxg8 Kd8
8.Nxb7+ Kc8
  +-  (#11)   Depth: 10   00:01:15  28347kN

(Mahamood, home 03.08.2002)





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