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Subject: Re: Test Position - Patzer 3.11 (3 seconds)

Author: Robert Hyatt

Date: 07:44:36 01/07/04

Go up one level in this thread

On January 07, 2004 at 05:26:58, Mike Hood wrote:

>On January 07, 2004 at 00:20:17, K. Burcham wrote:
>
>>
>>Steve Maughan, big book of combinations
>>
>>Tibensky - Franzen
>>Find Kh6
>> [D] 1r3rk1/b1pR1p2/p3p1p1/2q1P1Kp/P1N2P2/1P1Q2P1/7P/3R4 w - -
>
>This is on my humble Pentium III-733. Patzer was the first engine I tried,
>because it seems to be skilful at finding the right move in closed positions.
>
>Analysis by Patzer 3.11:
>
>1.Qxg6+
>  -+  (-10.00)   Depth: 1   00:00:00
>1.Qf3
>  ²  (0.42)   Depth: 1   00:00:00
>1.Qf3 Bb6
>  µ  (-0.98)   Depth: 2   00:00:00
>1.Qf3
>  µ  (-0.96)   Depth: 2   00:00:00
>1.Kh4
>  ³  (-0.57)   Depth: 2   00:00:00
>1.Kh4
>  =  (-0.18)   Depth: 3   00:00:00
>1.Qf3
>  =  (-0.06)   Depth: 3   00:00:00
>1.Qf3 a5
>  µ  (-0.75)   Depth: 4   00:00:00  1kN
>1.g4 hxg4 2.Kxg4 a5 3.Qh3 Rbe8
>  =  (-0.04)   Depth: 4   00:00:00  9kN
>1.g4 hxg4 2.Kxg4 Ra8 3.Qg3
>  =  (0.17)   Depth: 5   00:00:00  36kN
>1.g4 hxg4 2.Kxg4 a5 3.Qh3 Rfe8 4.Rxf7 Kxf7 5.Qh7+
>  =  (-0.06)   Depth: 6   00:00:01  115kN
>1.Qf3 Bb6 2.g4 hxg4 3.Qg3 a5
>  =  (-0.03)   Depth: 6   00:00:02  152kN
>1.Kh4 Qf2 2.Rd2 Qc5 3.Rd1
>  =  (0.00)   Depth: 6   00:00:02  167kN
>1.Kh6
>  ²  (0.51)   Depth: 6   00:00:03  284kN
>1.Kh6 a5 2.Nxa5 Qxa5 3.Qxg6+ fxg6 4.Rg7+
>  ²  (0.56)   Depth: 7   00:00:04  376kN
>1.Kh6 a5 2.Nxa5 Qxa5 3.Qxg6+ fxg6 4.Rg7+ Kh8 5.Rh7+ Kg8 6.Rg7+
>  ²  (0.56)   Depth: 8   00:00:05  497kN
>1.Kh6 a5 2.Nxa5 Qxa5 3.Qxg6+ fxg6 4.Rg7+ Kh8 5.Rh7+
>  ²  (0.56)   Depth: 9   00:00:08  841kN
>1.Kh6 Rfc8 2.Rxf7 Kxf7 3.Qxg6+ Ke7 4.Qf6+ Ke8 5.Nd6+ cxd6 6.Rxd6 Rb7 7.Qh8+ Ke7
>8.Qf6+
>  ²  (0.56)   Depth: 10   00:01:15  11987kN


It isn't seeing what it is supposed to see.  Kh6 is a big tactical win.  Here
for some reason, patzer simply can't see any way for white to improve after Kh4,
which is strange as white is better.  But since it drops to draw for Kh4, Kh6
is chosen for the wrong reason...  Most programs evaluate Kh4 and Kh6 as nearly
the same until they notice that Kh6 wins big material after a pretty deep
search.

• Re: Test Position - Patzer 3.11 (3 seconds) Mike Hood 04:31:10 01/08/04
  • Re: Test Position - Patzer 3.11 (3 seconds) Robert Hyatt 06:48:23 01/08/04

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