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Subject: Re: Crafty Misevaluation?

Author: Stefan Fredriksson

Date: 09:53:24 03/17/01

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On March 17, 2001 at 11:03:36, Alex Patterson wrote:

>"[D]1r5k/1p4Rp/p1p2p2/2Qr4/2P5/1P4PK/P1q4P/8 w - - 2 33"
>Crafty gave -6.23 for Black! it this a misevaluation?

What version of crafty are you using? Mine (18.03) never gives such low eval for
this position.

Analysis by Crafty 18.03:

33.cxd5 Qxc5
  -+  (-10.77)   Depth: 2/5   00:00:00
33.Qxd5 cxd5
  -+  (-10.41)   Depth: 2/5   00:00:00
33.Rxb7
  -+  (-10.01)   Depth: 2/5   00:00:00
33.Rxb7 Qf5+ 34.Kg2 Rxc5 35.Rxb8+
  -+  (-9.58)   Depth: 2/5   00:00:00
33.Rxb7 Qf5+ 34.g4 Rd3+ 35.Kg2 Qxc5 36.Rxb8+
  -+  (-9.73)   Depth: 3/7   00:00:00
33.Rxb7 Qf5+ 34.g4 Rd3+ 35.Kh4 Qxc5 36.Rxb8+
  -+  (-9.75)   Depth: 4/11   00:00:00
33.Rxb7 Qf5+ 34.g4 Rd3+ 35.Kh4 Qxc5 36.Rxb8+ Kg7
  -+  (-10.05)   Depth: 5/12   00:00:00
33.Rxb7 Qf5+ 34.g4 Qf3+ 35.Kh4 Rg8 36.Qg1 Rh5+ 37.gxh5 Rxg1
  -+  (-10.06)   Depth: 6/13   00:00:00  78kN
33.Rxb7 Qf5+ 34.g4 Qf1+ 35.Kh4 Qe1+ 36.Kh3 Rd3+ 37.Kg2 Qe2+ 38.Qf2 Qxg4+ 39.Kf1
Rxb7 40.Qxf6+
  -+  (-11.22)   Depth: 7/14   00:00:00  280kN
33.Rxb7 Qf5+ 34.g4 Qf1+ 35.Kh4 Qe1+ 36.Kh3 Rd3+ 37.Kg2 Qe2+ 38.Qf2 Qxg4+ 39.Qg3
Rxg3+ 40.hxg3 Rxb7
  -+  (-15.59)   Depth: 8/16   00:00:01  909kN
33.Qxd5
  -+  (-15.19)   Depth: 8/16   00:00:01  1052kN
33.Qxd5 cxd5 34.Re7 dxc4 35.bxc4 Qxa2 36.c5 a5
  -+  (-12.08)   Depth: 8/16   00:00:01  1066kN
33.cxd5 Qxc5 34.Rd7 cxd5 35.Kh4 Qc2 36.h3 Qxa2 37.Rxd5
  -+  (-12.05)   Depth: 8/16   00:00:01  1132kN
33.cxd5 Qxc5 34.Rd7 cxd5 35.g4 Qe3+ 36.Kh4 Qf2+ 37.Kh3 Qxa2 38.Rxd5
  -+  (-12.09)   Depth: 9/18   00:00:01  1242kN
33.cxd5 Qxc5 34.Rg4 Qxd5 35.Rf4 Kg7 36.Kg4 Re8 37.Rf2
  -+  (-12.91)   Depth: 10/18   00:00:09  8042kN
33.cxd5 Qxc5 34.Rg4 Qxd5 35.Rc4 Re8 36.Rf4 Qh5+ 37.Kg2 Re2+ 38.Kf1 Qxh2 39.Rxf6
  -+  (-13.28)   Depth: 11/18   00:00:11  10148kN
33.cxd5 Qxc5 34.Rg4 Qxd5 35.Rf4 Re8 36.Rxf6 Re2 37.Rf8+ Kg7 38.Rf4 Qg2+ 39.Kh4
Qxh2+ 40.Kg5
  -+  (-13.38)   Depth: 12/19   00:00:17  15402kN






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