Author: Ralf Elvsén
Date: 12:48:03 08/15/03
Go up one level in this thread
On August 15, 2003 at 04:57:07, Peter Fendrich wrote: >On August 14, 2003 at 21:43:42, Ralf Elvsén wrote: > >> >>Hello >> >>I haven't done any chess programming in over a year now (cured :). As you say >>yourself below, this could be a statistical fluctuation. But I'm with Uri here: >>I remember implementing a special improvement in move ordering in my program. >>It worked fine, the time to search to a certain depth decreased. However, the >>measure you call 1FH got worse. I made the same interpretation as Uri, namely if >>you produce crappy moves at one ply you can will get a lot of FHs at the next >>and your statistics looks fine :) I actually had a more refined statistic then >>you: >>I had 1FH for each ply, it probably was opposite effects for the last ply and >>the ply before that (can't remember for sure though) but there are more nodes >>closer to the leafs and they dominate the statistics. Hope I made myself clear, >>it's late at night... >> >>After that I didn't care much about this number anymore. >> >>Ralf > >You think you're cured? Why are you engaged in this discussion then ... :-) Woke up at night and couldn't sleep. That is when you do the most useless things :) >I bet you'll start again soon... Nope. Last summer I wasted a lot of time on chess programming. What did I get? A program ranked nr 200 in the world? :) None of my brilliant ideas worked as I thought they would. This summer I have been skydiving instead. Much better :) > >Yes, Uri has a point. I agree on that but not necessary in this case. Hash moves >are used as first moves only (in my program). Removing the hash moves should >worsen the 1FH that is clearly defined as performance of the first move only. >Your example, as you described it in another post, makes sence I think but you >should get better values in other meassurements. 1FH is only one dimension. > >/Peter Sorry for being a little unclear about what I meant. I wasn't trying to explain your numbers, just give my opinion on 1FH as a reliable measure of move ordering. Ralf
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.