Author: Bruce Moreland
Date: 22:53:23 01/08/00
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On January 08, 2000 at 12:41:13, Antonio Dieguez wrote: >On January 08, 2000 at 11:56:25, Dan Andersson wrote: > >>>"Extensions" are usually used to keep a program from running out of search >>>depth. My understanding was (probably very wrong) that extension are some kind >>>of addition search done for few next plys deep. If this is really so, how can >>>extension "keep program from running out of search depth"? > >that phrase traduced to spanish is not very clear I suppose you have the same >little problem, may be keep program from running out means keep program running >in ? > >>You said it yourself! By adding more depth. >> >>Regards DAn You start out with some number of plies of depth, like for instance 8, and every time you make a move you decrement. So if you have 8 now, you make a move and now you have 7. Then you make a move and have 6, etc. Eventually you have 0, and you cut to qsearch. Let's say you have 8 now, and an extension kicks in. You still have 8. Another one kicks in, and you still have 8. So you avoid running out of remaining depth. Other ways to do it but that's good enough. bruce
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