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Subject: Re: One easy mate to solve. Correction!

Author: Tim Foden

Date: 00:02:32 09/13/01

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On September 12, 2001 at 10:45:44, leonid wrote:

>On September 12, 2001 at 10:34:41, leonid wrote:
>
>>[D]Q6r/1prpbqk1/1Q4q1/1Q1nn1p1/1Q1NN1p1/1R4q1/1BBQQRp1/K6b w - -
>>
>>Please indicate your result.
>>

Green Light Chess 2.15-pr7, Duron 920MHz, 96MB hash, claims that:

Rxf7+ is Mate in 11 after 50 seconds, and
Qxg6+ is Mate in 10 after 18 minutes 49 seconds.

Cheers, Tim.

Analysis:

 Game stage: Opening
 Current eval: 25.36
 Ply  Time   Score   Nodes  Principal Variation
  3   0.19      --   39429  Rxf7+   (a=29.39 b=30.19 e=29.39)
  3   0.20 +26.037   44707  Rxf7+ Qxf7 Nf5+ Qxf5 Rxg3 Rxa8+
  3   0.33 +26.037   89216  Rxf7+ Qxf7 Nf5+ Qxf5 Rxg3 Rxa8+
  4   0.38 +26.003  115624  Rxf7+ Qxf7 Qxh8+ Kxh8 Qh6+ Kg8 Rxg3 Bxb4 Qhxg5+
  4   0.96 +26.003  403965  Rxf7+ Qxf7 Qxh8+ Kxh8 Qh6+ Kg8 Rxg3 Bxb4 Qhxg5+
  5   0.97      ++  406297  Rxf7+   (a=25.60 b=26.40 e=26.40)
  5   1.24 +28.916  557656  Rxf7+ Qxf7 Nf5+ Qxf5 Qxh8+ Kxh8 Qh6+ Kg8 Qdxd5+ Qf7
                              Rxg3 Bxb4 Bxe5
  5   3.84 +28.916 2018676  Rxf7+ Qxf7 Nf5+ Qxf5 Qxh8+ Kxh8 Qh6+ Kg8 Qdxd5+ Qf7
                              Rxg3 Bxb4 Bxe5
  6   3.92      ++ 2060910  Rxf7+   (a=28.52 b=29.32 e=29.32)
  6   4.62 +31.801 2472829  Rxf7+ Qxf7 Nf5+ Qxf5 Qxh8+ Kxh8 Qh6+ Qh7 Qxh7+ Kxh7
                              Nxg3+ Ng6 Qbd4
  6  11.68 +31.801 6635386  Rxf7+ Qxf7 Nf5+ Qxf5 Qxh8+ Kxh8 Qh6+ Qh7 Qxh7+ Kxh7
                              Nxg3+ Ng6 Qbd4
  7  11.74      ++ 6659250  Rxf7+   (a=31.40 b=32.20 e=32.20)
  7  14.85 +44.893 8705373  Rxf7+ Qxf7 Qxh8+ Kxh8 Qh6+ Qh7 Qxh7+ Kxh7 Nxg3+
                              Rxc2 Qxc2+ Kh6 Ndf5+ Kg6 Nxe7+ Kh6 Ng8+ Kg7 Bxe5+
                              Kxg8 Qxd5#
  7  37.13 +44.893  22657k  Rxf7+ Qxf7 Qxh8+ Kxh8 Qh6+ Qh7 Qxh7+ Kxh7 Nxg3+
                              Rxc2 Qxc2+ Kh6 Ndf5+ Kg6 Nxe7+ Kh6 Ng8+ Kg7 Bxe5+
                              Kxg8 Qxd5#
  8  37.17      ++  22679k  Rxf7+   (a=44.49 b=45.29 e=45.29)
  8  50.28 +Mate11  33092k  Rxf7+ Qxf7 Qxh8+ Kxh8 Qh6+ Qh7 Qxh7+ Kxh7 Nxg3+
                              Rxc2 Qxc2+ Kh6 Ndf5+ Kg6 Nxe7+ Kh6 Ngf5+ Kh7 Rh3+
                              gxh3 Qh5#
  8   3:22 +Mate11 147173k  Rxf7+ Qxf7 Qxh8+ Kxh8 Qh6+ Qh7 Qxh7+ Kxh7 Nxg3+
                              Rxc2 Qxc2+ Kh6 Ndf5+ Kg6 Nxe7+ Kh6 Ngf5+ Kh7 Rh3+
                              gxh3 Qh5#
  9   6:56 +Mate11 321805k  Rxf7+ Qxf7 Qxh8+ Kxh8 Qh6+ Qh7 Qxh7+ Kxh7 Nxg3+
                              Rxc2 Qxc2+ Kh6 Ndf5+ Kg6 Nxe7+ Kh6 Qd6+ Nf6 Qxf6+
                              Ng6 Qcxg6#
  9  18:49 +Mate10 980540k  Qxg6+ Qxg6 Qxe7+ Nxe7 Ne6+ Qxe6 Qxg5+ Ng6 Qxg6+
                              Kxg6 Nxg3+ Rxc2 Qxc2+ Nd3 Qcxd3+ Qf5 Qdxf5+ Kh6
                              Qxh8#
  9  33:45 +Mate10   1783m  Qxg6+ Qxg6 Qxe7+ Nxe7 Ne6+ Qxe6 Qxg5+ Ng6 Qxg6+
                              Kxg6 Nxg3+ Rxc2 Qxc2+ Nd3 Qcxd3+ Qf5 Qdxf5+ Kh6
                              Qxh8#
 10 1:18:15 +Mate10   4331m  Qxg6+ Qxg6 Qxe7+ Nxe7 Ne6+ Qxe6 Qxg5+ Ng6 Qxg6+
                              Kxg6 Nxg3+ Rxc2 Qxc2+ Nd3 Qcxd3+ Qf5 Qdxf5+ Kh6
                              Qxh8#
 10 3:46:12 +Mate10  12686m  Qxg6+ Qxg6 Qxe7+ Nxe7 Ne6+ Qxe6 Qxg5+ Ng6 Qxg6+
                              Kxg6 Nxg3+ Rxc2 Qxc2+ Nd3 Qcxd3+ Qf5 Qdxf5+ Kh6
                              Qxh8#
 11 5:57:52 +Mate10  20241m  Qxg6+ Qxg6 Qxe7+ Nxe7 Ne6+ Qxe6 Qxg5+ Ng6 Qxg6+
                              Kxg6 Nxg3+ Rxc2 Qxc2+ Kg7 Bxe5+ Kh6 Qxh8+ Kg5
                              Bf6#
 11 8:14:28   2/89           Rxf7+  >exit
 local:  t=8:14:31  nps=947495.9  n=28113896336 (19.8% / 80.2%)  fh=94.5%
 total:  t=8:14:31  nps=947495.9  n=28113896336  draws=2993016
 trans:  probes=-1935115430  hits=152725454 (-7.89%)  draft=112604923 (-5.82%)
 tcuts:  exact=520 (-0.00%)  upper=77495954 (-4.00%)  lower=34592616 (-1.79%)
 tstor:  exact=969 (0.00%)  upper=1008665131 (69.78%)  lower=436783606 (30.22%)
 ext:  check=-781449541  recap=25740258  ppush=37713  1rep=91631051  thrt=0
 q-moves:  gen=22093676  tested=2771029  made/un=375074  max-dep=11
 max eval diff:  part-1=2.645  part-2=2.290



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