Author: Robert Hyatt
Date: 15:37:45 10/06/99
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On October 06, 1999 at 18:09:40, Scott Gasch wrote: > >Hi Dr. Hyatt, > >Thanks for the reply. It turns out that my extension code was messed up -- I >reversed a sign in a conditional and was extending way too much. My only >remaining question for you is about the "n" in your stats. Is that both qnodes >and tree nodes or just tree nodes. After I fixed the extension problem I am >seeing about 8k tree nodes and about 30k qnodes for the same 6 ply a3 search. > N for me is total nodes searched, regular + quiescence... >Another one: the extension I had messed up was a pawn push extension. I was >(and am) extending the search if a pawn was just pushed near queening (1/2 ply >for white pawn -> 6th file, full ply to 7th, same for black on other end). I do >this because my program was allowing pawns to queen too easily. Is this a good >idea? How do others deal with queening threats? > >Thanks, >Scott Nothing wrong with that... although you might not want to extend as much in the middlegame as you do in the endgame where passed pawns like to run...
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