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Subject: an easy (?) mate in 11

Author: Mike S.

Date: 21:29:27 12/10/02


In this study, Black has either only one legal move (1st-7th), or there is only
one move which avoids immediate mate (8th/9th):

Kok,T - [+3350.47g2b7]
td06 {v}, 1938
[D]qrb5/pk1p4/p2Pp3/p3Pp2/B4P2/1P6/5pK1/6B1 w - - 0 1
1.Kxf2 Kb6 2.Ke2+ Kb7 3.Ke3 Kb6 4.Kd3+ Kb7 5.Kd4 Kb6 6.Kc4+ Kb7 7.b4 axb4 8.Bd1
a5 9.Kb5 a6+ 10.Ka4 Qa7 11.Bf3# 1-0

P3/700 MHz, 64 MB hash:

Analysis by Goliath Light 1.5:

1.Bxf2
  -+  (-15.60)   Depth: 6/8   00:00:00
  -+  (-15.64)   Depth: 7/9   00:00:00
1.Kxf2 Kb6 2.Ke2+ Kb7 3.Ke3
  =  (0.00)   Depth: 7/10   00:00:00  1kN
  +-  (#11)   Depth: 16/39   00:00:10  14218kN


Analysis by Nimzo 8:

1.b4
  -+  (-21.08)   Depth: 1/11   00:00:00
1.Bc6+ Kxc6
  -+  (-20.62)   Depth: 1/11   00:00:00
  -+  (-20.12)   Depth: 1/11   00:00:00
1.Bh2
  -+  (-17.59)   Depth: 1/11   00:00:00
  -+  (-17.59)   Depth: 1/11   00:00:00
1.Bxf2
  -+  (-14.96)   Depth: 1/11   00:00:00
  =  (0.00)   Depth: 16/34   00:00:03  991kN
1.Kxf2 Kb6 2.Ke2+ Kb7 3.Ke3 Kb6 4.Kd3+ Kb7 5.Kd4 Kb6 6.Kc4+
  +-  (#5)   Depth: 16/34   00:00:03  991kN
  +-  (#9)   Depth: 16/34   00:00:08  4346kN

(Too small number of moves in the mate announcement is typical for N8, but the
pv is ok so far.)


Analysis by Yace 0.99.56:

1.Bxf2
  -+  (-11.79)   Depth: 1   00:00:00
  =  (0.00)   Depth: 16/28   00:00:04  2339kN
1.Kxf2 Kb6 2.Ke2+ Kb7 3.Ke3 Kb6 4.Kd3+ Kb7 5.Kd4 Kb6 6.Kc4+ Kb7 7.b4 axb4 8.Kxb4
a5+ 9.Kxa5 a6 10.Bd1 Qa7 11.Bf3#
  +-  (#11)   Depth: 16/28   00:00:05  2753kN
  +-  (#11)   Depth: 18/28   00:00:22  15212kN

Perfect.

Regards,
M.Scheidl



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