Author: Mikael Bäckman
Date: 15:37:36 10/14/03
Go up one level in this thread
On October 14, 2003 at 13:11:25, Gerhard Sonnabend wrote: >On October 14, 2003 at 10:38:00, Mikael Bäckman wrote: > >>On October 14, 2003 at 07:21:47, James T. Walker wrote: >> >>>On October 14, 2003 at 06:46:39, martin fierz wrote: >>> >>>>On October 14, 2003 at 06:19:17, Gerhard Sonnabend wrote: >>>> >>>>>Hi ! >>>>> >>>>>The second match is closed. >>>>>(I only post the short tables here) >>>>> >>>>>Could any chessprogram profit from longer/shorter levels ? >>>>> >>>>>At the moment i carry out an experiment to find out if there are chessengines >>>>>which profit from shorter or longer (time)levels more than other engines. >>>>>Played on a P4-1600 / 64MB HTs / 4-TBs / ponder=off >>>>>with the "Noomen" (A-H) (=160 games every match) under the ChessBase-Fritz7-GUI. >>>>> >>>>>Completed are: >>>>>Shredder 7.04 vs Junior 8.0.0.2 >>>>> Total (+ 1/2 -) >>>>> 5min/game 98.5-61.5 (87-23-50) >>>>> 10min/game 94.0-66.0 (76-36-48) >>>>> 30min/game 92.5-67.5 (70-45-45) >>>>>120min/game 89.5-70.5 (65-49-46) >>>>> >>>>>and: >>>>> >>>>>Shredder 7.0(CB) vs Fritz 8.0.0.5 >>>>> Total (+ 1/2 -) >>>>> 5min/game 63.0-97.0 (40-46-74) >>>>> 10min/game 68.0-92.0 (49-38-73) >>>>> 30min/game 72.5-87.5 (47-51-62) >>>>>120min/game 68.5-91.5 (43-51-66) >>>>> >>>>>The current matches is (after 120 games per Level): >>>>>Chess Tiger 15.0(CB) "Normal" vs Beta-WIN-Rebel 12 (style=Test12a) >>>>> Total (+ 1/2 -) >>>>> 5min/game 83.0-37.0 (68-30-22) >>>>> 10min/game 80.0-40.0 (63-34-23) >>>>> 30min/game 68.5-51.5 (48-41-31) >>>>>120min/game 65.5-54.5 (41-49-30) >>>>>(Played on a Cel. 1.8GHz / 128MB HTs / ...the rest look above) >>>>> >>>>>The details and the games can be found on: >>>>>www.pcschach.de >>>>> >>>>>Best G.S. >>>> >>>>nice tests! shredder vs junior and CT15 vs rebel 12 beta at least show trends of >>>>favoring one program at short and another program at long time control. >>>> >>>>this seems quite natural to me. if one program has better move ordering than >>>>another it will do better at longer time controls, since better MO is an >>>>exponential gain. i have seen this behavior in my checkers program in matches >>>>against another program - mine does better at longer time controls. and, since i >>>>know the other programmer well, i also know that i spend a lot more time on move >>>>ordering. so i'm not really surprised about my checkers result. i'm more >>>>surprised that some people don't want to believe that this effect exists :-) >>>> >>>>cheers >>>> martin >>> >>>So what would happen if you took Shredder vs Junior & CT15 vs Rebel 12 beta and >>>played them at G/120 minutes on a 286-12Mhz cpu ?? >> >> >>I guess the results would be similar to the 5min/game listed above. >> >>/Mikael > >Hi Mikael ! > >I'dont think so. Playing 5m/g it can happen all what you think about or not. >Playing games with 5 or 10m/g is nonsense. I've seen games on this level where >one engine has had +7.00 or more and less moves later this engine lost the game >(not on time) !!! >The MHz of the CPU isn't important. With longer time control i've never >seen such unusual behavior. >I think that the result on "this" 286-12MHz and 120m/g would bring >the same result as my match on the P4 on this level ! > >Best G.S. Hi Gerhard! The time ratio between 120m/g and 5m/g is 24. If cpu mhz would be the only thing which affects NPS (and depth), a CPU with 75 Mhz (1800/24) would play a 120m/g precisely the way a 1800Mhz cpu plays a 5m/g. The reason you have seen losses from +7 scores is because the engine did not calculate deep enough. An engine on a slow CPU would not see deep enough even with 120m/g. Mhz matters, Mikael
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