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Subject: Very interesting crazyhouse position-to Georg Zimmerman (sunsetter test)

Author: Lieven Clarisse

Date: 03:14:47 11/11/02


Here is a very interesting crazyhouse position, after

  1.  e4      (0:00.000)      e5      (0:00.000)
  2.  Nf3     (0:01.320)      Nc6     (0:00.720)
  3.  Bc4     (0:00.380)      Be7     (0:00.820)
  4.  O-O     (0:01.870)      Nf6     (0:00.710)
  5.  d4      (0:01.650)      exd4    (0:03.299)
  6.  Nxd4    (0:01.050)      Nxe4    (0:03.840)
  7.  Nxc6    (0:06.870)      bxc6    (0:03.250)
  8.  Bxf7+   (0:08.350)      Kxf7    (0:02.970)
  9.  Qh5+    (0:15.160)      Kf8     (0:17.680)
 10.  N@g6+   (0:07.420)      hxg6    (0:04.670)
 11.  Qxh8+   (0:01.480)      Kf7     (0:00.770)
 12.  R@f4+   (0:08.950)      B@f5    (0:06.420)
 13.  Qxd8    (0:04.280)      Bxd8    (0:05.760)
 14.  Rxe4    (0:00.830)      N@h3+   (0:06.310)
 15.  gxh3    (0:02.360)      Q@g2+   (0:27.900)
 16.  Kxg2    (0:02.090)      Bxe4+   (0:00.600)
 17.  f3      (0:01.100)      N@h4+   (0:02.630)
 18.  Kf2     (0:01.040)      R@g2+   (0:20.700)
 19.  Ke3     (0:03.960)      Nf5+    (0:07.420)
 20.  Kxe4    (0:02.140)      d5+     (0:09.120)
 21.  Kd3     (0:01.700)

we get to this position

[D]r1bb4/p1p2kp1/2p3p1/3p1n2/8/3K1P1P/PPP3rP/RNB2R2 b

Black holding: [PP]
White holding: [PPNNBQQ]

which appears to be a forced win for black!!!!

after

 21.  Kd3     (0:01.700)      P@c4+   (0:00.000)
 22.  Kc3     (0:00.000)      Bf6+    (0:00.000)
 23.  Kb4     (0:00.000)      a5+     (0:00.000)
 24.  Kc5     (0:00.000)

we get

[D]r1b5/2p2kp1/2p2bp1/p1Kp1n2/2p5/5P1P/PPP3rP/RNB2R2 b

Black holding: [P]
White holding: [PPNNBQQ]

Now it appears that there are two mating moves!!!

be7 and bd7!!!

When I put this into sunsetter, sunsetter preferes bd7, however if i give it
be7, it finds the mate within seconds!! Strange.
Sunsetter was unable to find the mate after i gave it bd7 after an overnight
analyze. The mate was found by Dragonslayr on FICS and sunsetter only finds it
when i play the next moves sunsetter actually advises! Very strange.
The beauty of bd7 is that it is a non-check position, and white has lots of
checks to give with all that material in hand. (lots of horizon to loook over)


regards,

lieven








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