Author: Ricardo Gibert
Date: 18:18:01 08/15/03
Go up one level in this thread
On August 15, 2003 at 15:48:03, Ralf Elvsén wrote: >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 >:) > Skydiving! In chess, a player makes so many mistakes. I wonder if you think about that before you jump? >> >>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
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