Author: Ed Schröder
Date: 14:00:27 05/09/00
Go up one level in this thread
On May 09, 2000 at 12:52:20, blass uri wrote: >On May 09, 2000 at 10:34:20, Mark Andreoli wrote: > >> >> I recently played a 5 minute blitz game against International Master Nenad >>Aleksic. see moves below: (I lost as I am black.) >> >> 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O >> >> 8.Bc4 Nc6 9. Bb3 Bd7 10.g4 Qa5 11.h4 Rfc8 12.h5 Ne5 13.hxg6 hxg6 >> >> 14.Bh6 Bh8 15.Qd2 b5 16.O-O-O Nc4 17.Bxc4 Rxc4 18.Nb3 Qc7 19.Bf8!! OK >> >> "gang" the parties over. All variations are FORCED and win rather quickly >> for white. The game continued 19. ... Rxf8 20.Rxh8+ Kxh8 21.Qh6+ Kg8 >> >> 22.Rh1 Nh5 22. gxh5 Rxc3 23.hxg6 1-0 >> >> My question is _why_ can't the above mentioned "engines" F5/F6/Hiarcs >>find the move 19. Bf8 (Nenad found it in only 20 seconds). The engines all want >>to play Bg5?? >> >> _which wins too_ in a __long endgame_ however I thought nothing could >>beat these chess computers when it came to tactics. >> Maybe I overlooked something? Maybe Junior,Rebel,CM 7000 or Chess Tiger >>can find this "simple but elegant tactical shot"! Could anyone help me out by >>checking the position after the 18th move. I would love to be corrected and/or >>enlightened. Thanks for any help in solving this _mystery_!? MJA :-( > >The reason that programs cannot see it is because the tactics is too deep for >them. > >They see lines like 19.Bf8 Rxf8 20.Rxh8+ Kxh8 21.Qh6+ Kg8 22.Rh1 Nh5 23.gxh5 >Rxc3 24.hxg6 Rxc2+ 25.Kd1 Rc1+ 26.Nxc1 a6 and think that black has equality > >It is known that program are very weak at seeing long tactics and this is the >reason that they cannot solve some studies and that humans can sometimes >outsearch them in the endgame. > >Most of the tactic in the middle game is short tactic so in most of the cases >they are better than humans in tactics in the middle game. > >Chessmaster6000(ss=10) was the fastest program in this position and needed 4 >minutes and some seconds to see Bf8(hardwrae pIII450) > >Rebel Century was the second best and needed more than 5 minutes but less than 6 >minutes to see it on my pIII450 > >Uri The latest version of Rebel running under EPD2DIAG: Bf8 in 1:31 00:00 06.00 0.95 1.Bg5 Bg7 2.Bxf6 Bxf6 3.Nd5 Qc8 4.Nxf6+ exf6 00:02 07.00 1.69 1.Bg5 Bg7 2.Bxf6 Bxf6 3.Nd5 Qc8 4.g5 Bxg5 5.Qxg5 00:03 08.00 1.69 1.Bg5 Bg7 2.Bxf6 Bxf6 3.Nd5 Qc8 4.g5 Bxg5 5.Qxg5 Rxc2+ 6.Kb1 00:06 09.00 1.69 1.Bg5 Bg7 2.Bxf6 Bxf6 3.Nd5 Qc8 4.g5 Bxg5 5.Qxg5 Rxc2+ 6.Kb1 00:09 10.00 2.02 1.Bg5 Bg7 2.Bxf6 exf6 3.Qxd6 Qxd6 4.Rxd6 Be6 5.Nxb5 Rac8 00:16 11.00 1.98 1.Bg5 Bg7 2.Bxf6 exf6 3.Qxd6 Qxd6 4.Rxd6 Be6 5.Nxb5 Rac8 6.Rd2 01:31 11.17 1.98 1.Bf8 02:22 11.17 2.57 1.Bf8 Rxf8 2.Rxh8+ Kxh8 3.Qh6+ Kg8 4.Rh1 Nh5 5.gxh5 Rxc3 6.hxg6 Rxc2+ 7.Kb1 Rh2 8.Rxh2 Athlon 1000 Mhz, 60 Mb hash. Ed
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