Author: GeoffW
Date: 16:06:06 09/02/04
Go up one level in this thread
>Hi Geoff,
>
>I think one possibility is this...
>
>I don't increment 'ply' when null-moving... (i decrement remaining depth, of
>course)
>
>That may explain why Crafty works with +1 and TRACE works with +2.
>
>In fact, that may point out a capital search bug in TRACE. My nullmoves
>'corrupt' the true value of ply. Not good. And it explains some odd search
>behaviours. Also, I cannot test if (ply & 1) to see if the side to move is a
>particular colour. I will fix this in the next week or so and see if it helps.
>Oooooohhh.... I have a good feeling about this...
>
>Ross
Hi Ross
Yes, that does look like the explanation as to why there is a difference of +1
I was interested to see what effect the correction would have so I quickly put a
ply++ and ply-- around the null move search call.
Not sure what your code will do but mine went Splat !!
Thats going to be a fun one to debug, no idea what is causing it at the moment,
hope your works better than mine. I will be interested to know how it worked for
you ?
Regards Geoff
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