Author: Ed Schröder
Date: 15:18:40 02/01/02
Go up one level in this thread
On February 01, 2002 at 15:25:26, John Merlino wrote: >These two positions are from Ariel-Altounian, Round 8 of the recent US >Championships. This game won a Brilliancy Prize for Ariel. > >[D]8/1p6/p1b1P3/P1Pn1Pk1/2P3P1/8/3KB2r/5R2 b - c3 0 46 > >The annotation on the Seattle Chess Federation's website (they hosted the >Championships) say that the next move, 46...Nf4, is "a huge blunder", since it >allows 47.Rxf4 Kxf4 (which was played, and White went on to win). However, >CM8000 doesn't see anything better for Black, nor does it see a big win for >White. What do other engines say? Rebel gets a fail-low on 46..Nf4 and moves to 46...Nf6 in accpetable time. I think in this position it all comes down to the evaluation of passed pawns. 00:00:01.5 -0,19 9 317804 Nf4 Rxf4 Kxf4 f6 Rh8 f7 Ba4 Kc3 00:00:02.0 -0,65 10 730576 Nf4 Rxf4 Kxf4 f6 Kg5 f7 Rf2 Kc3 00:00:05.5 0,25 11 3842229 Nf4 Rxf4 Kxf4 f6 Rh8 f7 Rf8 Bd3 00:00:09.6 0,25 12 6961850 Nf4 Rxf4 Kxf4 f6 Rh8 f7 Rf8 Bd3 00:00:29.2 -0,28 13 25805013 Nf4 Rxf4 Kxf4 f6 Rh6 f7 Rf6 Kd3 00:01:30.6 -0,76 14 81935296 Nf4 Rxf4 Kxf4 f6 Rh8 f7 Be8 g5 00:03:40.5 -0,32 14 198805809 Nf6 Kd3 Rg2 00:07:59.9 -0,25 15 435701351 Nf6 Kd3 Rg2 >Time Depth Score Positions Moves >0:00 1/3 0.94 810 46...Nf4 47.Re1 Kf6 >0:00 1/4 0.71 2110 46...Nf4 47.Rxf4 Kxf4 48.f6 Ke5 > 49.f7 >0:00 2/5 0.11 9816 46...Nf4 47.Re1 Kf6 48.e7 Kxe7 > 49.g5 Kf7 >0:00 3/6 0.00 16977 46...Nf4 47.Re1 Ng2 48.Rf1 Nf4 >0:00 4/7 0.73 59578 46...Nf4 47.Rxf4 Kxf4 48.f6 Ke5 > 49.f7 Rf2 50.Ke3 Rf4 >0:02 5/8 0.36 207798 46...Nf4 47.Rxf4 Kxf4 48.f6 Ke5 > 49.f7 Rf2 50.Ke3 Rf4 51.g5 >0:08 6/9 0.41 668722 46...Nf4 47.Rxf4 Kxf4 48.f6 Rh8 > 49.f7 Rf8 50.Bd3 Ke5 51.Bf5 Kf6 >0:31 7/10 0.27 2603901 46...Nf4 47.Rxf4 Kxf4 48.f6 Rh8 > 49.f7 Rf8 50.Bd3 Ke5 51.Bf5 Kf6 > 52.Ke3 Ke7 >1:38 8/11 0.39 8162267 46...Nf4 47.Rxf4 Kxf4 48.f6 Ke5 > 49.f7 Rf2 50.Ke3 Rf4 51.g5 Re4+ > 52.Kf2 Rf4+ 53.Kg3 Rf5 54.Bg4 >5:57 9/12 0.29 29643766 46...Nf4 47.Rxf4 Kxf4 48.f6 Rh8 > 49.f7 Rf8 50.Bd3 Ke5 51.Bf5 Kf6 > 52.Ke3 Rd8 53.Kf4 Rd4+ 54.Kg3 > >The second position is from the same game, a little further on. > >[D]5r2/1p3P2/p1b1P3/P1P5/2P2kP1/8/3KB3/8 w - - 0 50 > >It was described as "the tournament's prettiest move!!" (exclamation points not >added by me). This was the reason for the exchange sacrifice above, and the move >that CM misses. Now CM sees this one fairly quickly, and it is now a clear win >for White: 50.Bf3 is indeed a beauty! Not so simple for humans, a piece of cake for computers. Chess sometimes is just great, thanks for sharing John. Ed >Time Depth Score Positions Moves >0:00 1/3 0.61 545 50.Bd3 Ke5 51.Bf5 Kf6 >0:00 2/4 0.61 2395 50.Bd3 Ke5 51.Bf5 Kf6 >0:00 3/5 0.46 4737 50.Bd3 Ke5 51.Bf5 Kf6 52.Ke3 Ke7 >0:00 4/6 0.61 14010 50.Bd3 Ke5 51.Bf5 Kf6 52.Ke3 Ke7 > 53.g5 >0:00 5/7 0.49 36539 50.Bd3 Ke5 51.Bf5 Kf6 52.Kd3 Rd8+ > 53.Ke3 Ke7 54.g5 >0:01 6/8 0.47 116295 50.Bd3 Ke5 51.Bf5 Kf6 52.Ke3 Rd8 > 53.g5+ Ke7 54.g6 Kf8 >0:04 7/9 0.38 383642 50.Bd3 Ke5 51.Bf5 Rd8+ 52.Ke3 Kf6 > 53.g5+ Ke7 54.g6 Kf8 55.Be4 >0:09 7/9 1.10 825866 50.Bf3 Kxf3 51.g5 b6 52.cxb6 Ke4 > 53.b7 Rd8+ 54.Ke1 Ba4 55.e7 Rd1+ > 56.Ke2 >0:27 8/10 2.05 2432304 50.Bf3 Be8 51.fxe8=Q Rxe8 52.Bxb7 > Rxe6 53.c6 Re7 54.Bxa6 Ra7 55.Bb7 > Rxa5 >0:52 9/11 2.43 4810115 50.Bf3 Be8 51.fxe8=Q Rxe8 52.Bxb7 > Rxe6 53.c6 Re7 54.Bxa6 Ra7 55.Bb7 > Rxa5 56.c7 > >Here's the whole game, which was quite exciting: > >[Event "2002 US Championship"] >[Site "Seattle"] >[Date "2002.01.12"] >[Round "8"] >[White "Ariel, Donny"] >[Black "Altounian, Levon"] >[Result "1-0"] >[ECO "A00"] >[WhiteElo "2367"] >[BlackElo "2442"] >[PlyCount "109"] >[EventDate "2002.01.??"] >[SourceDate "2002.01.05"] > >1.e4 d6 2.d4 Nf6 3.Nc3 c6 4.f4 Qa5 5.e5 Ne4 6.Bd3 Nxc3 7.Qd2 d5 8.bxc3 >c5 9.Nf3 Nc6 10.O-O e6 11.dxc5 Bxc5+ 12.Kh1 a6 13.Qe1 Bd7 14.a4 Qc7 >15.Qg3 g6 16.Ng5 Ne7 17.Qh4 h6 18.Nxf7 Kxf7 19.Bxg6+ Kg8 20.Qh5 Kg7 >21.Bd3 Rag8 22.Rf3 Be8 23.Qh4 Ng6 24.Qf6+ Kh7 25.Qxe6 Qd7 26.Qxd7+ Bxd7 >27.Bd2 Rf8 28.e6 Bc6 29.Re1 Rf6 30.f5 Ne7 31.Bf4 d4 32.Be5 Rhf8 33.cxd4 >Bxf3 34.dxc5 Bc6 35.Bxf6 Rxf6 36.a5 h5 37.Kg1 h4 38.g4 hxg3ep 39.hxg3 >Kh6 40.g4 Kg5 41.Be2 Kf4 42.Kf2 Rh6 43.Rf1 Nd5 44.Ke1+ Kg5 45.Kd2 Rh2 >46.c4 Nf4 47.Rxf4 Kxf4 48.f6 Rh8 49.f7 Rf8 50.Bf3 Be8 51.fxe8=Q Rxe8 >52.Bxb7 Rxe6 53.c6 Re7 54.Bxa6 Ke5 55.Bb7 1-0 > >jm
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.