Author: Uri Blass
Date: 16:08:54 05/10/05
Go up one level in this thread
On May 10, 2005 at 18:41:14, Rolf Tueschen wrote: >On May 10, 2005 at 15:49:17, Alex Schmidt wrote: > >>Hello, >> >>seems like you missed the point of the accuse: >> >>http://www.uciengines.de/UCI-Engines/Patriot/Patriot2/patriot2.html >> >>It shows only two examples but you have the same behaviour in all positions. >> >>In the first seconds you can see a relation between Toga and Patriot in the >>score, depth, seldepth and pv. Later the score changes what can have different >>reasons. >> >>This is not the behaviour of a few lines of Toga code, this is a behaviour of >>slightly changed Toga code. >> >>Though this is enough for me to be sure for 100% that Patriot 2 is a Toga clone >>there are even better evidences. >> >>You can be sure, Rolf, that I would never publish such an accuse without to be >>sure for more than 100%. > >Dear Alex! > >I have no reason to have great respect for you. I got the impression that you >are a real expert in computerchess. For all you are much better qualified than >me. This is my forword and the essence won't change after what I'll say right >now! > >Your belief in your 100% or even more [tongue in cheek] certainty is >unjustified. I take for granted that I have the allowance to make a short quote >from your own webpage which goes like this: > >[QUOTE from what I take as Alex' webpage:] > >250398<1:Patriot 2.0 beta UCI by Vladimir Yelin >250516>1:uci >250566<1:info string Knowledge database file not found! >250567<1:info string Learning function now is disabled! >250568<1:id name Patriot 2.0 >250568<1:id author Vladimir Yelin >250570<1:option name Hash type spin default 100 min 1 max 1024 >250571<1:option name Ponder type check default false >250572<1:uciok > >255450<2:Toga II 0.93 UCI based on Fruit 2.0 >255581>2:uci >255631<2:id name Toga II 0.93 >255631<2:id author Thomas >255632<2:option name Hash type spin default 100 min 1 max 1024 >255632<2:option name Ponder type check default false >255633<2:option name SingleReply Extension type check default true >255633<2:uciok > >What you can see here is the startup of the engines. UCI engines have the >ability to show adjustable options to the GUI. The order and values are not at >all ruled by the UCI protocol. This few lines are enough for me to be sure for >99% that one engine is a clone of the other engine. 99% is not too high because >99% of the chessengines have a default value for hashtablesize of <16 or >devideable with 8 but never 100. Out of that we have the same min and max values >and the same ponder option line. Most new engines don’t have the ponder option >line at all because pondering works also without it. > >Don’t look at missing or additional lines, it’s easy for the cloner to change >them. > >[end of quote] > > >Alex, I'm not into computerchess programming, but I'm used to read science. With >that experience I know something about a presentation of facts. This here is NOT >the slightest proof for Patriot 2 being a clone of Toga. Not at all. It is not a proof but it is enough evidence to suspect that it is a clone. The convincing evidence is later. The fact that the evaluation of patriot is exactly 3/2 the evaluation of fruit at small depth and the fact that the depth of Patriot can be calculated from the depth of fruit/Toga by adding 2 and the pv's are the same is enough evidence for me. The fact that the selective search depth of patriot is calculated by a formula based on the depth of fruit is also enough evidence and you can see it in the last position when there are no moves to select but Patriot shows selective depth based on the same formula. Uri
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