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Subject: Re: Trapping the queen

Author: Steffen Jakob

Date: 20:51:51 09/30/01

Go up one level in this thread


On September 30, 2001 at 22:44:38, Koundinya Veluri wrote:

>[D]r1b2rk1/1ppq2bp/3p1ppB/3Pp2P/p1P1P1P1/4QP2/PP2NK1R/R7 b - - 0 20
>
>The game went 20... Bxh6 21. Qxh6 g5 and the white Queen is completely out of
>play for the rest of the game. It's as though black is a piece up. How can
>programs spot such threats?

With mobility!

Hossa 1.135:

 depth   value    time    nodes pv
    1    -2.56    0.01       10 1... g7h8 2.h6xf8 Kxf8 3.h5xg6
  2/1    -0.11    0.01       14 1... g7xh6 2.e3xh6
  6/1    +0.15    0.01       90 1... d7f7 2.h6xg7 f7xg7 3.h5xg6 g7xg6
 14/1    +0.52    0.01      165 1... g5 2.h6xg7 d7xg7
   <1>   +0.52    0.02      257 1... g5 2.h6xg7 d7xg7
    2    +0.52    0.02      306 1... g5 2.h6xg7
   <2>   +0.52    0.02      515 1... g5 2.h6xg7
    3    +0.52    0.03      842 1... g5 2.h6xg7 d7xg7
!   3    +1.39    0.05     2393 1... g7xh6 2.e3xh6 g5
!  <3>   +1.39    0.06     2640 1... g7xh6 2.e3xh6 g5
    4    +1.11    0.07     3658 1... g7xh6 2.e3xh6 g5 3.Ke1
   <4>   +1.11    0.10     5293 1... g7xh6 2.e3xh6 g5 3.Ke1

...

Greetings,
Steffen.



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