Author: Sune Larsson
Date: 15:38:35 01/01/06
Go up one level in this thread
On January 01, 2006 at 18:24:39, David Dahlem wrote: >On January 01, 2006 at 14:38:29, Sune Larsson wrote: > >>On January 01, 2006 at 14:03:15, David Dahlem wrote: >> >>>On January 01, 2006 at 02:53:42, Sune Larsson wrote: >>> >>>>On December 31, 2005 at 21:17:47, Joseph Ciarrochi wrote: >>>> >>>>>One possibility is that rybka does not have specific endgame knowledge, but its >>>>>general chess knowledge is quite applicable to the endgame? >>>>> >>>>>It seems like rybka is one version away from being the best at analyzing >>>>>endgames? or am i too optimistic? >>>> >>>> >>>> Exciting future to come...Rybka is the crowned bullet master from rumours >>>> I've heard....so relatively better in endings at short time control.... >>>> relatively - compared to other engines. >>>> >>>> But I close my eyes for games in blitz tempo. Two games from the pos 1 >>>> in the suite - 40 moves in 5 minutes - were enough. Rook ending and the >>>> level of play was...huh... not good... >>>> >>>> With some more 40-games matches, using the endgame suite, we can study more >>>> details - which engine seems to handle the rook ending best? How about >>>> the theme "good knight vs bad bishop"? etc. Interesting. >>>> >>>> >>>> To keep in mind - or on paper - the following positions are documented and >>>> verfied *won* for white/black - and highly unbalanced - even if some engines >>>> don't recognize it... >>>> >>>> >>>> Won positions: N:o 10, 11, 12, 13, 14, 15, 17, 19 >>>> >>>> Draw position: N:o 16 (black draws with activity only - 1.- Rd2!) >>>> >>>> Slightly better for black: N:o 20 (the double rook ending by Andersson) >>>> >>>> Unclear position: N:o 18 (the bishop pair vs pair of knights + an extra pawn) >>>> >>>> >>>> 1-9 are the NunnE positions. >>>> >>>> >>>> /S >>> >>>I think there is an error in position 2. It appears the white king has been >>>moved as suggested as a possible move by Nunn in his annotation. But it's not >>>the correct position in his endgame suite. :-) >>> >>>Regards >>>Dave >> >> >> We sure need observant eyes around here ;-) This doesn't change the outcome >> of games played - since 1.Kd4 is the obvious move for white - but it is >> corrected! >> >> /S > >Yes, i understand Kd4 is an obvious move, but that's the purpose of positions of >this type, to test how engines play. Maybe Rybka or some other engine can find >something different. :-) > >And altering a Nunn position and still calling it a Nunn position, well, just >doesn't seem right to me. :-) > >Regards >Dave You're right. I got these 10 Nunn endings from somewhere - and obviously there was an error in this position. Anything can happen... Takes some time to get things straight. /S > >> >> >>> >>>> >>>> >>>> >>>> >>>> >>>> >>>>> >>>>> >>>>> >>>>>On December 31, 2005 at 17:02:13, Jouni Uski wrote: >>>>> >>>>>>I played 60/5 level match from Sune's positions: >>>>>> >>>>>>1 Rybka 1.0 Beta 32-bit 0½½0½½½11½½½01100110½0½010½½½½1½½½111½½0 20.5/40 >>>>>>2 Fritz 9 1½½1½½½00½½½10011001½1½101½½½½0½½½000½½1 19.5/40 >>>>>> >>>>>>Hmm?!?!? "No endgame knowledge". Quite modest! >>>>>> >>>>>>Jouni
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