Author: Joachim Rang
Date: 11:52:24 09/25/03
Go up one level in this thread
On September 25, 2003 at 14:02:18, John Merlino wrote: >On September 25, 2003 at 12:08:17, Will Singleton wrote: > >>[D]6k1/8/p3p2p/2Q5/1N2qp2/8/5K2/8 b - - 0 47 >> >>Black has the option of Qe3+, going into a 3 pawns vs knight game. It appears >>from analysis that after the queens are off, white cannot stop all the pawns. I >>don't know whether it's possible to win without trading queens (doesn't look >>like it), but it appears certain that Qe3+ will win. However, programs are >>reluctant to play it. > >Even after forcing 1...Qe3+ 2.Qxe3 fxe3+ 3.Kxe3 a5, Chessmaster 9000, on a >P4-2.4, does not see a win for Black after four minutes (this is, of course, >without tablebases): > >Time Depth Score Positions Moves >0:00 1/3 0.00 395 50.Nc2 a4 51.Kd4 >0:00 1/4 0.00 744 50.Nc2 a4 51.Kd4 a3 52.Nxa3 >0:00 1/5 -0.04 1489 50.Nc2 a4 51.Kd4 h5 52.Ke5 h4 53.Kxe6 >0:00 2/6 0.00 3060 50.Nc2 a4 51.Kf4 h5 52.Kg5 a3 53.Nxa3 >0:00 3/7 -0.20 7370 50.Nc2 a4 51.Kf4 Kf7 52.Ke5 h5 > 53.Ke4 h4 >0:00 4/8 -0.10 17614 50.Nc2 a4 51.Na3 Kg7 52.Kd4 h5 > 53.Nc4 h4 >0:00 4/8 -0.06 24163 50.Nc6 a4 51.Kd4 h5 52.Kc3 h4 53.Kb4 > h3 54.Kxa4 >0:00 5/9 -0.27 37136 50.Nc6 a4 51.Kd4 h5 52.Kc3 h4 53.Kb4 > h3 54.Kxa4 h2 >0:00 6/10 -0.37 77869 50.Nc6 a4 51.Nb4 Kf7 52.Nc2 h5 > 53.Kf4 Kf6 54.Ke4 h4 >0:00 6/10 -0.26 91891 50.Nc2 a4 51.Kf4 Kf7 52.Kg4 Kg6 > 53.Kf4 h5 54.Ke4 h4 >0:00 7/11 -0.43 158681 50.Nc2 a4 51.Kf4 Kf7 52.Na3 Kf6 > 53.Kg4 e5 54.Kf3 Kf5 55.Ke3 h5 >0:00 7/11 -0.27 227087 50.Nd3 a4 51.Kd4 h5 52.Kc3 h4 53.Kb4 > h3 54.Kxa4 h2 55.Nf2 Kf7 56.Kb5 >0:00 8/12 0.00 352836 50.Nd3 a4 51.Kd4 h5 52.Kc3 h4 53.Nf2 > h3 54.Nxh3 Kf7 55.Kb4 a3 >0:01 9/13 0.00 568989 50.Nd3 a4 51.Kd4 h5 52.Kc3 h4 53.Nf2 > h3 54.Nxh3 Kf7 55.Kb4 a3 56.Kxa3 >0:02 10/14 0.00 971430 50.Nd3 a4 51.Kd4 h5 52.Kc3 h4 53.Nf2 > h3 54.Nxh3 Kf7 55.Kb4 a3 56.Kxa3 > Kf6 >0:05 11/15 -0.08 2273479 50.Nd3 a4 51.Kd4 Kf7 52.Kc3 Kf6 > 53.Kb4 e5 54.Kxa4 e4 55.Kb4 exd3 > 56.Kc3 Kg7 57.Kxd3 Kf7 >0:09 12/16 -0.06 4490795 50.Nd3 a4 51.Kd4 Kf7 52.Kc3 Kf6 > 53.Kb4 e5 54.Kxa4 e4 55.Nf2 Kf5 > 56.Kb4 e3 57.Nd3 e2 58.Kc3 >0:15 13/17 -0.08 7305134 50.Nd3 a4 51.Kd4 Kf7 52.Kc3 Kf6 > 53.Kb4 e5 54.Kxa4 e4 55.Kb3 exd3 > 56.Kc3 Kg7 57.Kxd3 Kf7 >0:22 14/18 -0.08 11125174 50.Nd3 a4 51.Kd4 Kf7 52.Kc3 Kf6 > 53.Kb4 e5 54.Kxa4 e4 55.Kb3 exd3 > 56.Kc3 Kg7 57.Kxd3 Kg6 >0:38 15/19 -0.08 18933211 50.Nd3 a4 51.Kd4 Kf7 52.Kc3 Kf6 > 53.Kb4 e5 54.Kxa4 e4 55.Kb3 exd3 > 56.Kc3 Kg7 57.Kxd3 Kg6 >1:25 16/20 -0.09 43186414 50.Nd3 Kf7 51.Nc5 Kf6 52.Kf4 e5+ > 53.Ke4 h5 54.Nd7+ Kg5 55.Nxe5 a4 > 56.Kd4 Kf4 57.Ng6+ Kf5 58.Nh4+ > Kg4 59.Ng2 a3 60.Kc3 a2 61.Kb2 > Kf3 62.Nh4+ Kg3 63.Nf5+ Kg4 >2:39 17/21 -0.12 82511196 50.Nd3 a4 51.Kd4 Kf7 52.Kc3 h5 > 53.Kb4 h4 54.Nf2 Kf6 55.Kxa4 Ke5 > 56.Kb4 Kd4 57.Kb3 Ke3 58.Nh3 Kf3 > 59.Kc2 Kg3 60.Ng5 >3:45 18/22 -0.08 110963169 50.Nd3 a4 51.Kd4 Kf7 52.Kc3 h5 > 53.Kb4 h4 54.Nf2 Kf6 55.Kxa4 Ke5 > 56.Kb3 Kf4 57.Kc2 Kg3 58.Ne4+ Kg2 > 59.Ng5 h3 60.Nxh3 Kxh3 61.Kd3 Kg3 > 62.Ke4 Kf2 > >jm after 1...Qe3+ 2.Qxe3 fxe3+ 3.Kxe3 you have a 6-piece endgame, so TB will probably help a lot :-) regards Joachim
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