Author: Robert Hyatt
Date: 07:10:23 02/07/01
Go up one level in this thread
On February 07, 2001 at 04:39:55, Gian-Carlo Pascutto wrote: >On February 07, 2001 at 02:21:43, Severi Salminen wrote: > >>Thanks. And what is the difference between "lazy" and "plain" approaches? > >The 'plain' approach resolves the score immediately (by researching), >the 'lazy' one works as Bob described. > >>Have you BTW tested this in Crafty > >I can't answer for Bob here, but I know Cray Blitz did. > >>(is Crafty a PVS searcher?)? > >Yes. > >-- >GCP Cray Blitz was the first program I know of to use a null-window search after the first move was searched with a normal window (this happened by accident after a conversation with Murray Campbell, I believe in 1978 or 1979.) Belle was the first program I know of to use lazy bounding, although once I saw it in operation, I did it in Cray Blitz. I did remove it in the 80's somewhere as I hated the fact that I had nothing to ponder and would often end up sitting doing nothing, waiting on my opponent to move. This is why I wrote the "puzzling mode" stuff in crafty. If I don't have a move, I flip sides and do a short search to get something to ponder...
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