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Subject: Re: detecting and evaluating pins

Author: martin fierz

Date: 15:53:49 02/24/04

Go up one level in this thread


On February 24, 2004 at 11:42:13, Robert Hyatt wrote:

>On February 24, 2004 at 11:23:11, martin fierz wrote:
>
>>On February 24, 2004 at 11:16:21, Robert Hyatt wrote:
>>
>>>On February 24, 2004 at 10:48:47, martin fierz wrote:
>>>
>>>>On February 23, 2004 at 13:29:08, Vincent Diepeveen wrote:
>>>>
>>>>>On February 23, 2004 at 10:02:37, Russell Reagan wrote:
>>>>>
>>>>>>On February 23, 2004 at 07:02:59, martin fierz wrote:
>>>>>>
>>>>>>>aloha,
>>>>>>>
>>>>>>>i have a question about pins. pins are a rather important feature in chess; some
>>>>>>>of them are not so bad, some are deadly. i just happened to chat briefly with
>>>>>>>anthony cozzie on ICC, and he said he didn't do any pin detection. i detect
>>>>>>>pins, but i don't evaluate whether a pin is not so bad or deadly. my questions
>>>>>>>are:
>>>>>>>-> are you detecting pins in your program?
>>>>>>>-> if yes, do you try to distinguish between different pins?
>>>>>>>
>>>>>>>cheers
>>>>>>>  martin
>>>>>>
>>>>>>I don't know if this is a good idea or not, but something I have thought of in
>>>>>>the past is that a move that pseudo-attacks the king is probably worth
>>>>>>considering. The move might be a pin, but it can also be a skewer. Even if it is
>>>>>>not a direct tactic (say, there are two or three pieces in front of the king),
>>>>>>it might setup a tactic eventually. The nice thing about this is that with an
>>>>>>0x88-like board where you have unique square relationships, this can be done by
>>>>>>a single table lookup.
>>>>>
>>>>>If you have no idea, why the hell are you replying?
>>>>
>>>>hey vincent!
>>>>
>>>>i asked a simple question (in fact two), and russell replied to it. so he's
>>>>never tried his idea - what's the problem? i'm glad that people reply to
>>>>technical questions, whatever they say. good ideas, bad ideas, as long as they
>>>>have *some* ideas... it would be really bad if nobody replied, or if everybody
>>>>replied with posts like your last one :-(
>>>>of course i'm also glad that you replied to my original question, just wondering
>>>>why on earth you made that last post?
>>>>
>>>>cheers
>>>>  martin
>>>
>>>
>>>The answer to the _last_ question above is intuitively obvious to the casual
>>>observer.  Hint"  "slang name for donkey".
>>>
>>>:)
>>
>>hi bob,
>>
>>don't get this wrong, i greatly respect your contributions to this forum. but
>>then again, i could ask you the same question as vincent: why on earth did you
>>make this last post? ;-)
>>
>>cheers
>>  martin
>
>Simple.  I was answering your question.
>
>:)

i was asking vincent, not you. i already know your answers about vincent :-)

cheers
  martin



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