Author: Robert Hyatt
Date: 11:08:25 03/11/03
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On March 10, 2003 at 19:04:56, Will Singleton wrote: >I also messed around with this one a lot, and found that on a push to the >seventh, a full ply extension was best. Sixth rank and other pawn extensions >blew up the search too much, or else didn't help if fractional. > >The 7th rank extension helps me quite a bit in game play and test suites. > >Will Remember that it is easy to make a single fractional extension "trigger" I use 60 as a single ply, and several extensions are .75 ply values, which turns into 45 in my fractional ply measuring. When you do an N ply search, rather than setting "depth_remaining_ to N*60, you can set it to N*60+30, which means that the _first_ two 3/4 ply extensions will actually extend the search by two plies rather than 1.5, since you have that .5 ply bias in from the beginning and any extension >= .5 will cause it to roll to the next whole depth.
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