Author: Shaley
Date: 01:06:09 08/31/05
Go up one level in this thread
On August 31, 2005 at 02:14:40, Uri Blass wrote: >>>The problem is that it also knows by evaluation to play Rxe3+ in the following >>>position inspite of the fact that the pawn endgame is drawn >>> >>>[D]8/2p2kp1/1p2p3/2p1p1PP/2P1P3/1r2BK2/4R3/3n4 b - - >>> >>>Uri >> >> Hi Uri >> Interesting position I am going to check >> with Zappa 1.1 in the evening (here 8.05 a.m now). >> Kurt > >The position is taken from a game that was posted against zappa1.0 but I guess >that 1.1 has the same problem because no improvement in pawn endgame was >mentioned by anthony. > > >see the following post >http://www.talkchess.com/forums/1/message.html?444681 > > > >Uri It's interesting that Hiarcs 9 and Fruit rate Rc3 as the best move, only Hiarcs found it out at 7 ply and Fruit at 2 ply, although they saw it almost instantly. Alexander Analysis by Hiarcs 9: 1...Nxe3 2.Rxe3 Rxe3+ 3.Kxe3 -+ (-1.73) Depth: 1/5 00:00:00 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 7/10 00:00:00 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 7/10 00:00:00 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 7/10 00:00:00 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 7/10 00:00:00 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 7/10 00:00:00 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 7/10 00:00:00 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 7/10 00:00:00 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 7/10 00:00:00 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 8/11 00:00:00 1kN 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 9/15 00:00:00 3kN 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 10/15 00:00:00 4kN 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 11/15 00:00:00 6kN 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 12/18 00:00:00 12kN 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 Rc1 6.Rf3 Rh1 7.Rf7+ Kd6 8.Kg4 Rg1+ 9.Kh4 -+ (-2.97) Depth: 13/21 00:00:01 31kN Analysis by Fruit 2.1: 1...Nxe3 2.Rxe3 µ (-1.01) Depth: 1/4 00:00:00 1...Ra3 µ (-1.05) Depth: 1/7 00:00:00 1...Ra3 2.h6 Nxe3 3.Rxe3 µ (-1.01) Depth: 2/8 00:00:00 1...Rd3 2.h6 Nxe3 3.Rxe3 µ (-1.13) Depth: 2/8 00:00:00 1...Rc3 2.h6 Nxe3 3.Rxe3 Rxc4 -+ (-1.80) Depth: 2/8 00:00:00 1...Rc3 2.h6 Nxe3 3.Rxe3 Rxc4 -+ (-1.80) Depth: 3/8 00:00:00 1...Rc3 2.h6 Nxe3 3.Rxe3 Rxc4 -+ (-1.80) Depth: 4/11 00:00:00 1...Rc3 2.h6 gxh6 3.gxh6 Kg8 4.Re1 Nxe3 5.Rxe3 Rxc4 -+ (-1.72) Depth: 5/11 00:00:00 1...Rc3 2.h6 Nxe3 3.Rxe3 Rxe3+ 4.Kxe3 gxh6 5.gxh6 Kg6 6.h7 Kxh7 -+ (-1.80) Depth: 6/12 00:00:00 5kN 1...Rc3 2.h6 Kg6 3.Re1 Nxe3 4.Rxe3 Rxe3+ 5.Kxe3 gxh6 6.gxh6 Kxh6 -+ (-1.92) Depth: 7/13 00:00:00 8kN 1...Rc3 2.h6 Nxe3 3.Rxe3 Rxe3+ 4.Kxe3 gxh6 5.gxh6 Kg8 6.Kf2 Kh7 7.Ke3 Kxh6 -+ (-1.92) Depth: 8/13 00:00:00 12kN 1...Rc3 2.h6 Nxe3 3.Rxe3 Rxe3+ 4.Kxe3 gxh6 5.gxh6 Kg6 6.h7 Kxh7 7.Kd3 Kg6 -+ (-2.16) Depth: 9/19 00:00:00 25kN 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke7 5.Kg3 b5 6.Rf3 Ke8 7.Rf7 Rc3+ 8.Kg4 -+ (-1.97) Depth: 10/21 00:00:01 39kN 1...Rc3 2.Re1 Nxe3 3.Rxe3 Rxc4 4.g6+ Ke8 5.Ra3 Ke7 6.Ra7 Rd4 7.Rxc7+ Rd7 8.Rxd7+ Kxd7 9.Ke3 -+ (-1.79) Depth: 11/21 00:00:01 55kN 1...Rc3 2.Re1 Nb2 3.g6+ Ke7 4.h6 gxh6 5.Rg1 Kf8 6.Rc1 Rxc1 7.Bxc1 Nxc4 8.Bxh6+ Ke7 9.Bg5+ Kf8 -+ (-1.64) Depth: 12/23 00:00:04 281kN 1...Rc3 2.Re1 Nb2 3.g6+ Ke7 4.h6 gxh6 5.Rc1 Rxc1 6.Bxc1 Nxc4 7.Bxh6 Kf6 8.g7 Kf7 9.Kg4 -+ (-1.70) Depth: 13/26 00:00:08 834kN 1...Rc3 2.Re1 Nb2 3.g6+ Ke7 4.Kg4 Rxc4 5.Bg5+ Ke8 6.h6 gxh6 7.Bxh6 Nd3 8.g7 Kf7 9.Rg1 Rc2 10.Kh3 -+ (-1.71) Depth: 14/30 00:00:20 2132kN
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