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Subject: QSearch and captures

Author: Michel Langeveld

Date: 02:04:42 11/20/01

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

Re: QSearch and captures Paul Byrne 16:58:55 11/20/01
It's working now and BOOM!! Michel Langeveld 13:55:13 11/20/01
- Re: It's working now and BOOM!! Koundinya Veluri 14:56:54 11/20/01
  - Re: It's working now and BOOM!! Michel Langeveld 15:12:35 11/20/01
- Re: It's working now and BOOM!! James Swafford 14:55:19 11/20/01
- Re: It's working now and BOOM!! Peter McKenzie 14:53:35 11/20/01
  - Re: It's working now and BOOM!! James Swafford 14:57:35 11/20/01
    - Re: It's working now and BOOM!! Robert Hyatt 15:02:16 11/20/01
      - Re: It's working now and BOOM!! James Swafford 15:05:50 11/20/01
        
        Re: It's working now and BOOM!! Gian-Carlo Pascutto 17:46:27 11/20/01
        
        Re: It's working now and BOOM!! James Swafford 18:02:45 11/20/01
        
        Re: It's working now and BOOM!! Gian-Carlo Pascutto 18:09:37 11/20/01
        
        Re: It's working now and BOOM!! Ralf Elvsén 01:33:10 11/21/01
        
        Re: It's working now and BOOM!! Robert Hyatt 08:20:25 11/21/01
        
        Re: It's working now and BOOM!! Ralf Elvsén 10:16:52 11/21/01
        
        Re: It's working now and BOOM!! Gian-Carlo Pascutto 05:45:14 11/21/01
        
        Re: It's working now and BOOM!! Rafael Andrist 11:28:28 11/21/01
        
        Re: It's working now and BOOM!! Robert Hyatt 08:22:13 11/21/01
        
        Re: It's working now and BOOM!! Ralf Elvsén 06:51:41 11/21/01
        
        Re: It's working now and BOOM!! Gian-Carlo Pascutto 07:48:02 11/21/01
        
        Re: It's working now and BOOM!! José Carlos 00:11:32 11/21/01
        
        Re: It's working now and BOOM!! Gian-Carlo Pascutto 05:48:25 11/21/01
        
        Re: It's working now and BOOM!! José Carlos 06:16:46 11/21/01
        
        Re: It's working now and BOOM!! James Swafford 18:23:00 11/20/01
        
        correction James Swafford 18:03:44 11/20/01
Re: QSearch and captures Robert Hyatt 06:38:01 11/20/01
Re: QSearch and captures Andrew Williams 02:24:24 11/20/01
- Re: QSearch and captures José Carlos 05:52:03 11/20/01
  - Re: QSearch and captures Andrew Williams 06:12:11 11/20/01
Re: QSearch and captures Steffen Jakob 02:09:36 11/20/01
- Re: QSearch and captures Michel Langeveld 02:22:34 11/20/01
  - Re: QSearch and captures Steffen Jakob 02:35:16 11/20/01

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