Author: Uri Blass
Date: 06:14:27 05/07/05
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On May 07, 2005 at 05:46:32, Claude Le Page wrote: >I suggest another method: >consider the famous game Atars-Tomson (it is in every database) >1 e4 e5 2 Nf3 f5 3 Bc4 fxe4 4 Nxe5 Qg5 5 d4 Qxg2 6 Qh5+ g6 7 Bf7+ Kd8 >8 Bxg6 Qxh1+ 9 Ke2 c6 10 Nc3 Kc7 11 Bf4 Qxa1 12 Nxd7+!! (every "good" engine >finds it)Kxd7 13 Qf5+ Kd8 14 Qxf8+ Kd7 15 Bf5# >The interesting point is elsewhere:On 12...Kd8 (best!)there is #14 (generally >announced as #18 ) >There are at least 3 mates completely different: that of Junior7 and that of >Shredder9 have nothing in common (although both are #14 announced as#18) >It would be interesting to compare on his position PVs of Patriot , Toga and so >on >As I am not Programmer , Just Analyst ( in my previous job as in my chess life ) >this method is easier for me >Surely , the position I quoted is not unique , and you could easily find other >ones What you suggest is not another method. Of course analyzing positions can practically help to prove that 2 engines are clones and I think that the test to detect clones should include also secret positions to see if the move of the program is the same as another open source program. I think that it is not productive to talk here about the exact methods to discover clones because it can help cloners and it is better to talk about it by email. Uri
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