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Subject: It's working now and BOOM!!

Author: Michel Langeveld

Date: 13:55:13 11/20/01

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On November 20, 2001 at 05:04:42, Michel Langeveld wrote:

>Hello all,
>
>I implemented qsearch in my program nullmover, but got a problem for it back.
>
>When I search with a depth 1 (just testing at the moment) my program thinks that
>after the openingmove 1. d4, ... h6! is the best move.
>
>After h6 the qsearch starts.
>
>[D]rnbqkbnr/ppppppp1/7p/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq - 0 2
>
>The qsearch evaluates _only_ captures now. The program thinks white HAS to take
>on h6 then (is only capture in that position) and black can win a bishop after
>gxh6 or Rxh6. So score is about +2 for black then. This is incorrect of
>course....
>
>I'm thinking about ways to solve this. One way is to implement a null move so
>that beside capturing there's always a doing nothing option. But I was curious
>how you guys solve this thing.
>
>Regards,
>
>Michel Langeveld

Ok,

Fixed the qsearch with a no move situation
Debugged it and tested it. It works very well at the moment.

I also implemented a better move ordening.
My search sometimes BOOMS already at ply 1 in tactical positions.
How can I fix this? Can I stop qsearch at an centain depth?

history:
(d2-d4  e7-e6  c1-e3  f8-d6  d4-d5  e8-f8  e3xa7  d6xh2  a7xb8  h2xg1  h1xh7
 a8xa2  b8xc7  g1xf2  e1xf2  d8xc7  d5xe6  a2xb2  e6xf7  h8xh7  f7xg8B b2xb1
 d1xb1  f8xg8  b1xb7  c7xc2  b7xd7  c2xe2  f1xe2  c8xd7  )



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