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Subject: Re: Crafty does not alway respond to "new" command

Author: Lex Loep

Date: 11:28:12 01/29/00

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On January 29, 2000 at 10:25:34, Robert Hyatt wrote:

>On January 29, 2000 at 04:05:00, Lex Loep wrote:
>
>>On January 28, 2000 at 17:21:00, Robert Hyatt wrote:
>>
>>>On January 28, 2000 at 15:44:03, Lex Loep wrote:
>>>
>>>>While working on my winboard adapter I run across this strange problem,
>>>>when a new game command is given on the GUI menus, the winboard
>>>>adapter translates this to a "new\n" be send to the winboard engine
>>>>crafty 17.3
>>>>normally after 'new' crafty comes back with tellics .. and kibitz...
>>>>not in this case, even giving 3 times new in a row, nothings comes back.
>>>>Then when I pass the first move to crafty, it certainly remembers all
>>>>the 'new' commands and shows all the tel and kib lines 3 times followed
>>>>by the moves.
>>>>Now in the above case there is no real problem, but if you play a few
>>>>moves until it is out the opening book, then give 'new' , the new command
>>>>is never recognised, then playing the first move is seen as illegal. then
>>>>another 'new' command brings everything back.
>>>>I first though there is some problem in hanlding the pipes from the
>>>>winboard adapter to crafty, but I could not find anything wrong.
>>>>
>>>>so I did the same test starting crafty standalone, gave it the following
>>>>commands:
>>>>
>>>
>>>
>>>are you fflushing the buffer on output?  Or have you set the buffer size
>>>to zero.  Crafty doesn't do any buffering at all, using only read() and
>>>write() to talk thru the pices.  If you don't flush() after writing "new\n"
>>>I won't get it until later.
>>>
>>
>>I am using WriteFile followed by FlushFileBuffers, if it get's it later
>>it's no problem, but sometimes it does not get it at all.
>>The same happens with crafty running in a command prompt and just
>>typing in the commands from the keyboard. It seem related to the 'new'
>>command itself in combination with pondering.
>>If I send the sequence
>>"ponder off\n"
>>"new\n"
>>then it works fine.
>>
>>Lex
>
>
>
>Is this the most recent version(s)?  IE I just tried this:
>
>book off
>e4
>(wait for it to move)
>(it makes move and starts pondering)
>I type "new"
>game backs up to move 1.
>
>
>
I have tried it with version 17.3 and with 15.14, both had the same
behaviour, I did type xboard on the prompt before the first move.
It's very strange, I changed my winboard adapter to send the
"ponder off\n" command befor "new\n" , then it works as expected.
Did you test on NT or Linux ?


>
>
>>
>>
>>>
>>>
>>>
>>>>xboard
>>>>e4
>>>>---- got back move e7e5
>>>>e4
>>>>---- got back move g8f6
>>>>h4
>>>>---- out of book, got back move f6e4
>>>>new
>>>>----  no response here
>>>>e4
>>>>----  Illegal move: e4   ??????
>>>>
>>>>Do I miss something, is this normal ?  Crafty 15.x has the same behaviour.
>>>>
>>>>Platform is NT 4 / SP6 / 128 MB
>>>>
>>>>
>>>>Lex



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