Author: Robin Smith
Date: 17:15:23 02/09/06
Go up one level in this thread
On February 09, 2006 at 20:04:57, Uri Blass wrote: >On February 09, 2006 at 19:33:38, Dann Corbit wrote: > >>On February 09, 2006 at 19:03:23, Terry McCracken wrote: >> >>>On February 09, 2006 at 17:27:35, Uri Blass wrote: >>> >>>>On February 09, 2006 at 13:00:39, Andreas St. wrote: >>>> >>>>>Hi, >>>>>yesterday i posted this position: >>>>> >>>>>2r5/2pR1pk1/p1P3p1/P2K4/5P1p/5P1P/8/8 w - - 0 1 >>>>> >>>>>and some users said, Rybka finds the solution. >>>>> >>>>>>Not Rybka 13b, but Rybka 1.0 Beta 32-bit (the first version!!!) >>>>>>Best regards, >>>>>>Orlando >>>>> >>>>>>Rybka 1.0 Beta 32-bit, sees Rxc7 quickly. I've no idea how the person testing >>>>>>whatever version had this failure. >>>>> >>>>>>Terry >>>>> >>>>> >>>>>What do you mean??? No Rybka version finds the only winning move Rxc7! >>>> >>>> >>>>Are you sure that it is the only winning move. >>>>Do you have a proof that f5 does not win? >>> >>>1. f5?! wins but isn't as good as the simple Rxc7! >> >>Perhaps there is a refutation from Rxc7. There may be some reason that the >>strong engines switch away from it. > >No > >Yace does not switch away from it and the score only goes up. >The only reason that they switch away is that they do not search deep enough and >do not extend pawn endgames like yace. If you force the first 11 plies like you have done with Yace, then most engines have no trouble seeing fairly quickly that white is winning. -Robin > >Here is yace some plies later > >[Event "10'/40+10'/40+10'/40"] >[Site "?"] >[Date "????.??.??"] >[Round "?"] >[White "New game"] >[Black "?"] >[Result "*"] >[SetUp "1"] >[FEN "2r5/2pR1pk1/p1P3p1/P2K4/5P1p/5P1P/8/8 w - - 0 1"] >[PlyCount "11"] >[TimeControl "40/600:40/600:40/600"] > >1. Rxc7 Rxc7 2. Kd6 Rc8 3. Kd7 Ra8 4. c7 Kf6 5. c8=Q Rxc8 6. Kxc8 * > > > >You can see that the score goes down temporary at depth 9 only to go up later. > >New game, 10'/40+10'/40+10'/40 >[D]2K5/5p2/p4kp1/P7/5P1p/5P1P/8/8 b - - 0 1 > >Analysis by Yace 0.99.87: > >6...g5 7.fxg5+ Kxg5 > = (0.02) Depth: 1 00:00:00 >6...Ke6 > µ (-0.81) Depth: 1 00:00:00 >6...Kf5 > µ (-0.90) Depth: 1 00:00:00 >6...Kf5 > µ (-0.90) Depth: 1 00:00:00 >6...Kf5 7.Kb7 g5 8.fxg5 Kxg5 > = (-0.01) Depth: 2 00:00:00 >6...Kf5 7.Kb7 Kxf4 > = (0.17) Depth: 2 00:00:00 >6...Kf5 7.Kb7 Kxf4 > = (0.17) Depth: 2 00:00:00 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 Kxf3 > = (0.17) Depth: 3 00:00:00 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 Kxf3 > = (0.17) Depth: 3 00:00:00 >6...Kf5 7.Kb7 Kxf4 8.Ka7 Kxf3 9.Kxa6 f5 > ³ (-0.34) Depth: 4 00:00:00 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 Kg3 9.Kb5 Kxh3 > µ (-1.37) Depth: 4 00:00:00 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 Kg3 9.Kb5 Kxh3 > µ (-1.37) Depth: 4 00:00:00 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 Kg3 9.Kb5 Kxh3 > µ (-1.37) Depth: 4 00:00:00 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 Kg3 9.Kb5 Kxh3 10.a6 Kg3 11.a7 h3 > µ (-0.78) Depth: 5 00:00:00 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 Kg3 9.Kb5 Kxh3 10.a6 Kg3 11.a7 Kh3 > = (0.22) Depth: 5 00:00:00 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 g5 9.Kb6 g4 10.fxg4 Kg3 11.a6 > ± (1.14) Depth: 5 00:00:00 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 g5 9.Kb6 g4 10.fxg4 Kg3 11.a6 > ± (1.14) Depth: 5 00:00:00 >6...Kf5 7.Kb7 Kf6 8.Kxa6 Ke6 9.Kb5 Kd6 10.a6 Kc7 11.Kc5 f5 > +- (1.64) Depth: 6/13 00:00:00 21kN >6...Kf5 7.Kb7 Kf6 8.Kxa6 Ke7 9.Ka7 f5 10.a6 Kd6 11.Kb7 g5 > +- (2.97) Depth: 6/15 00:00:00 26kN >6...Kf5 7.Kb7 g5 8.Kxa6 g4 9.fxg4+ Ke4 10.Kb5 f5 11.g5 Kd5 > +- (4.11) Depth: 6/15 00:00:00 43kN >6...Ke6 7.Kd8 Kd6 8.Ke8 Kc6 9.Kxf7 Kc7 10.Kxg6 Kc8 11.Kg5 Kb8 12.Kxh4 > +- (4.10) Depth: 6/15 00:00:00 49kN >6...Ke6 7.Kb7 Kd6 8.Kxa6 Kc6 9.Ka7 f5 10.a6 Kc7 11.Ka8 Kc6 > ± (1.18) Depth: 6/15 00:00:00 61kN >6...Ke6 7.Kb7 Kd6 8.Kxa6 Kc6 9.Ka7 f5 10.a6 Kc7 11.Ka8 Kc6 > ± (1.18) Depth: 6/16 00:00:00 63kN >6...Ke6 7.Kb7 Kd6 8.f5 f6 9.Kxa6 g5 10.Kb5 Kd7 11.a6 Kc7 12.Kc5 g4 > +- (1.58) Depth: 7/16 00:00:00 101kN >6...Ke6 7.f5+ gxf5 8.Kb7 Kf6 9.Kxa6 Kg5 10.Ka7 Kf4 11.Kb6 Kxf3 12.a6 Ke3 13.a7 >Kd4 > +- (2.58) Depth: 7/18 00:00:01 165kN >6...Ke6 7.f5+ gxf5 8.Kb7 Kd6 9.Kxa6 Kc7 10.Ka7 f4 11.a6 f5 12.Ka8 > +- (3.69) Depth: 7/20 00:00:01 196kN >6...Ke7 7.f5 g5 8.Kb7 Kd7 9.Kb6 g4 10.fxg4 f6 11.Kc5 Kc8 12.Kb6 Kb8 13.Kxa6 > +- (3.68) Depth: 7/20 00:00:01 227kN >6...Ke7 7.f5 g5 8.Kb7 Kd7 9.Kxa6 f6 10.Kb6 Kc8 11.Ka7 g4 12.fxg4 Kc7 13.a6 Kc6 >14.Ka8 > +- (3.68) Depth: 7/20 00:00:01 234kN >6...Ke7 7.f5 g5 8.Kb7 Kd7 9.Kxa6 f6 10.Kb6 Kc8 11.Ka7 g4 12.fxg4 Kc7 13.a6 Kc6 >14.Ka8 > +- (3.68) Depth: 7/21 00:00:01 236kN >6...Ke7 7.f5 g5 8.Kb8 Kd7 9.f6 g4 10.hxg4 Kd6 11.g5 Kd5 12.g6 h3 13.gxf7 h2 >14.f8B > +- (3.28) Depth: 8/21 00:00:01 278kN >6...Ke7 7.f5 gxf5 8.Kb7 Kd7 9.Kxa6 Kc8 10.Kb5 Kc7 11.Kc5 f6 12.Kd5 Kc8 13.Ke6 >Kb8 14.Kxf5 > +- (2.27) Depth: 8/21 00:00:01 305kN >6...Ke7 7.Kc7 Ke8 8.Kb6 Kd7 9.Kb7 f6 10.Kxa6 Kc7 11.Kb5 Kb7 12.a6+ Ka7 13.Ka5 g5 >14.fxg5 fxg5 > +- (1.79) Depth: 8/21 00:00:01 425kN >6...Ke7 7.Kc7 Ke8 8.Kb6 Kd7 9.Kb7 f6 10.Kxa6 Kc7 11.Kb5 Kb7 12.a6+ Ka7 13.Ka5 g5 >14.fxg5 fxg5 > +- (1.79) Depth: 8/21 00:00:01 523kN >6...Ke7 7.Kc7 Ke8 8.Kb6 Kd7 9.Kb7 f6 10.Kxa6 Kc7 11.Kb5 Kb7 12.a6+ Ka7 13.Ka5 g5 >14.fxg5 fxg5 15.Kb5 g4 > +- (1.79) Depth: 9/21 00:00:01 571kN >6...Ke6 7.f5+ gxf5 8.Kb7 Kd6 9.Kxa6 Kc7 10.f4 Kb8 11.Kb6 f6 12.Kc5 Ka8 13.Kc4 >Kb8 14.Kd3 Ka8 15.a6 Kb8 > +- (1.78) Depth: 9/21 00:00:02 752kN >6...Ke6 7.f5+ gxf5 8.Kb7 Kd6 9.Kb8 Kd5 10.Kc8 f6 11.Kd7 Kd4 12.Ke7 Kd5 13.Kxf6 >f4 14.Kg5 Kd6 15.Kxh4 > ± (1.39) Depth: 9/21 00:00:02 779kN >6...Ke6 7.Kc7 Kd5 8.Kd8 f5 9.Kd7 Kd4 10.Kc6 Ke3 11.Kb6 Kxf3 12.Kxa6 Kxf4 13.Kb5 >g5 14.a6 Ke5 > ² (0.39) Depth: 9/24 00:00:02 811kN >6...Ke6 7.Kc7 Ke7 8.Kb7 Kd7 9.Kxa6 Kc6 10.Ka7 Kc7 11.f5 gxf5 12.Ka6 Kc6 13.Ka7 >f4 14.Kb8 Kb5 15.Kc7 Kxa5 16.Kd6 f6 17.Ke6 f5 18.Kxf5 > ² (0.38) Depth: 9/24 00:00:02 896kN >6...Ke6 7.Kc7 Ke7 8.Kb7 Kd7 9.Kxa6 Kc6 10.Ka7 Kc7 11.f5 gxf5 12.Ka6 Kc6 13.Ka7 >f4 14.Kb8 Kb5 15.Kc7 Kxa5 16.Kd6 f6 17.Ke6 f5 18.Kxf5 > ² (0.38) Depth: 9/24 00:00:02 945kN >6...Ke6 7.Kb7 Kd5 8.Ka7 Kc4 9.Kxa6 Kb3 10.Ka7 f6 11.a6 g5 12.Ka8 g4 13.hxg4 Ka4 >14.a7 h3 15.f5 h2 16.Kb8 h1B > ± (0.78) Depth: 10/24 00:00:02 1162kN >6...Ke6 7.Kb7 Kd5 8.Kxa6 Kc6 9.f5 gxf5 10.f4 f6 11.Ka7 Kc7 12.a6 Kc8 13.Kb6 Kb8 >14.a7+ Ka8 15.Kc7 Kxa7 16.Kd6 Kb8 17.Ke6 Ka8 18.Kxf5 > ± (1.03) Depth: 10/25 00:00:02 1260kN >6...Ke7 7.Kc7 Ke8 8.Kd6 Kd8 9.Kc6 Kc8 10.Kd5 Kd8 11.Kd6 Ke8 12.f5 gxf5 13.Kd5 f4 >14.Kc4 Kd7 15.Kb3 f6 16.Kc4 Kc8 17.Kd4 Kd8 18.Kc5 Kd7 19.Kd5 Ke7 20.Kc6 Ke6 >21.Kc7 Kd5 22.Kd7 > ± (1.02) Depth: 10/25 00:00:02 1314kN >6...Ke7 7.Kb7 Kd7 8.Kb6 Kd6 9.Kxa6 Kc6 10.f5 gxf5 11.Ka7 Kc7 12.f4 Kc6 13.Ka8 f6 >14.Ka7 Kc7 > ± (1.03) Depth: 10/25 00:00:02 1403kN >6...Ke6 7.Kb7 Kd5 8.Kxa6 Kc6 9.f5 gxf5 10.f4 f6 11.Ka7 Kc7 12.a6 Kc8 13.Kb6 Kb8 >14.a7+ Ka8 15.Kc7 Kxa7 16.Kd6 Kb8 17.Ke6 Ka8 18.Kxf5 > ± (1.03) Depth: 10/25 00:00:02 1403kN >6...Ke6 7.Kb7 Kd5 8.Kxa6 Kc6 9.f5 gxf5 10.f4 f6 11.Ka7 Kc7 12.a6 Kc8 13.Kb6 Kb8 >14.a7+ Ka8 15.Kc7 Kxa7 16.Kd6 Kb8 17.Ke6 Ka8 18.Kxf5 > ± (1.03) Depth: 10/26 00:00:02 1421kN >6...Ke6 7.Kb7 Kd5 8.Kxa6 Kc6 9.f5 gxf5 10.f4 Kc7 11.Kb5 Kb7 12.Kc4 f6 13.Kd5 Ka6 >14.Ke6 Kxa5 15.Kxf6 Kb4 16.Kg5 Kc4 17.Kxh4 > +- (1.43) Depth: 11/26 00:00:02 1603kN >6...Ke6 7.Kb7 Kd6 8.Kxa6 Kc6 9.f5 gxf5 10.f4 Kc7 11.Kb5 Kb7 12.a6+ Ka7 13.Ka5 >Kb8 14.Kb6 Ka8 15.Kc6 Ka7 16.Kd5 Kxa6 17.Ke5 f6+ 18.Kxf6 Kb5 > +- (1.43) Depth: 11/28 00:00:02 1778kN >6...Ke6 7.Kb7 Kd6 8.Kxa6 Kc6 9.f5 gxf5 10.f4 Kc7 11.Kb5 Kb7 12.a6+ Ka7 13.Ka5 >Kb8 14.Kb6 Ka8 15.Kc6 Ka7 16.Kd5 Kxa6 17.Ke5 f6+ 18.Kxf6 Kb5 > +- (1.43) Depth: 11/28 00:00:03 1858kN >6...Ke6 7.Kb7 Kd6 8.f5 gxf5 9.Kxa6 Kc7 10.Kb5 Kb7 11.f4 Ka7 12.a6 Kb8 13.Kc5 Ka7 >14.Kd5 Kxa6 15.Ke5 Kb5 16.Kxf5 Kc4 17.Kg5 Kd4 18.Kxh4 f5 19.Kg5 > +- (1.43) Depth: 12/28 00:00:03 2400kN >6...Ke6 7.Kb7 Kd6 8.f5 gxf5 9.Kxa6 Kc7 10.Kb5 Kb7 11.f4 Ka7 12.a6 Kb8 13.Kc5 Ka7 >14.Kd5 Kxa6 15.Ke5 Kb5 16.Kxf5 Kc4 17.Kg5 Kd4 18.Kxh4 f5 19.Kg5 > +- (1.43) Depth: 12/31 00:00:03 2448kN, tb=1 >6...Ke6 7.Kb7 Kd6 8.f5 gxf5 9.Kxa6 Kc6 10.f4 Kc7 11.Kb5 Kb7 12.Kc5 Ka6 13.Kd5 >Kxa5 14.Ke5 Kb4 15.Kxf5 Kc4 16.Kg4 Kd3 17.Kxh4 Ke4 18.Kg3 f5 19.h4 > +- (1.44) Depth: 13/31 00:00:03 3131kN, tb=1 >6...Ke6 7.Kb7 Kd6 8.f5 gxf5 9.Kxa6 Kc6 10.f4 Kc7 11.Kb5 Kb7 12.Kc5 Ka6 13.Kd5 >Kxa5 14.Ke5 Kb4 15.Kxf5 Kc4 16.Kg4 Kd3 17.Kxh4 Ke4 18.Kg3 f5 19.h4 > +- (1.44) Depth: 13/34 00:00:03 3220kN, tb=1 >6...Ke6 7.Kb7 Kd6 8.f5 gxf5 9.Kxa6 Kc6 10.f4 f6 11.Ka7 Kc7 12.a6 Kc8 13.Kb6 Kb8 >14.Kc6 Ka7 15.Kd6 Ka8 16.Ke7 Ka7 17.Kxf6 Kb8 18.Kxf5 Kc7 19.Kg5 Kd8 20.Kxh4 Kc7 >21.f5 > +- (1.64) Depth: 14/34 00:00:04 4213kN, tb=3 >6...Ke6 7.Kb7 Kd6 8.f5 gxf5 9.Kxa6 Kc6 10.f4 f6 11.Ka7 Kc7 12.a6 Kc8 13.Kb6 Kb8 >14.Kc6 Ka7 15.Kd6 Ka8 16.Ke7 Ka7 17.Kxf6 Kb8 18.Kxf5 Kc7 19.Kg5 Kd8 20.Kxh4 Kc7 >21.f5 > +- (1.64) Depth: 14/34 00:00:04 4340kN, tb=7 >6...Ke6 7.Kb7 Kd6 8.f5 gxf5 9.Kxa6 Kc6 10.f4 f6 11.Ka7 Kc7 12.a6 Kc8 13.Kb6 Kb8 >14.Kc6 Ka7 15.Kd6 Kxa6 16.Ke6 Kb5 17.Kxf5 Kc6 18.Kxf6 Kc7 19.Ke5 Kd7 20.Kf5 Kd6 >21.Kg6 Ke7 22.f5 > +- (2.02) Depth: 15/38 00:00:04 5775kN, tb=9 >6...Ke6 7.Kb7 Kd6 8.f5 gxf5 9.Kxa6 Kc6 10.f4 f6 11.Ka7 Kc7 12.a6 Kc8 13.Kb6 Kb8 >14.Kc6 Ka7 15.Kd6 Kxa6 16.Ke6 Kb5 17.Kxf5 Kc6 18.Kxf6 Kc7 19.Ke5 Kd7 20.Kf5 Kd6 >21.Kg6 Ke7 22.f5 > +- (2.02) Depth: 15/38 00:00:04 5963kN, tb=9 >6...Ke6 7.Kb7 Kd6 8.f5 gxf5 9.Kxa6 Kc6 10.f4 Kc7 11.Kb5 Kb7 12.Kc5 Ka6 13.Kd6 >Kb5 14.Ke5 Kxa5 15.Kxf5 Ka6 16.Kg4 f6 17.Kxh4 Kb7 18.Kg4 Kc8 19.h4 Kc7 20.h5 Kd6 >21.h6 Ke6 22.f5+ > +- (2.42) Depth: 16/39 00:00:04 7411kN, tb=30 >6...Ke6 7.Kb7 Kd6 8.f5 gxf5 9.Kc8 Ke5 10.Kb8 Kf4 11.Ka7 Kxf3 12.Kxa6 f4 13.Ka7 >f6 14.Ka8 f5 15.Ka7 Kf2 16.a6 f3 17.Ka8 f4 18.Kb8 Ke2 19.a7 f2 20.a8Q f1Q 21.Qa7 > +- (2.43) Depth: 16/39 00:00:05 8752kN, tb=32 >6...Ke7 7.Kb7 Kd7 8.Kxa6 Kc6 9.f5 gxf5 10.f4 Kc7 11.Kb5 Kb7 12.Kc5 Ka6 13.Kd6 >Kxa5 14.Ke5 Kb4 15.Kf6 Kc4 16.Kg5 Kc5 17.Kxh4 Kd4 18.Kh5 Ke4 19.Kg5 Kd5 20.Kxf5 >Kc6 21.Kf6 Kd5 22.Kg7 > +- (2.42) Depth: 16/39 00:00:05 9915kN, tb=32 >6...Ke7 7.Kb7 Kd7 8.f5 Kd6 9.Kxa6 g5 10.Kb6 Ke5 11.a6 Kf4 12.a7 g4 13.a8Q f6 > +- (2.42) Depth: 16/39 00:00:06 10056kN, tb=33 >6...Ke7 7.Kb7 Kd7 8.f5 Kd6 9.Kxa6 g5 10.Kb6 Ke5 11.a6 Kf4 12.a7 g4 13.a8Q f6 > +- (2.42) Depth: 16/39 00:00:06 10237kN, tb=49 >6...Ke7 7.Kb7 Kd7 8.f5 Kd6 9.Kxa6 f6 10.fxg6 Ke5 11.Ka7 f5 12.f4+ Kxf4 13.Kb6 >Ke5 14.a6 f4 15.a7 f3 16.a8Q f2 17.g7 f1R > +- (2.82) Depth: 17/39 00:00:07 12042kN, tb=61 >6...Ke7 7.Kb7 Kd7 8.f5 Kd6 9.Kxa6 f6 10.fxg6 Ke5 11.Ka7 f5 12.f4+ Kxf4 13.Kb6 >Ke5 14.a6 f4 15.a7 f3 16.a8Q f2 17.g7 f1R > +- (3.82) Depth: 17/39 00:00:07 13149kN, tb=61 >6...Ke7 7.Kb7 Ke6 8.Kxa6 Kf5 9.Kb6 Kxf4 10.a6 Kg3 11.a7 Kxh3 12.a8Q Kg3 13.Qg8 >g5 14.Qxg5+ Kxf3 15.Qxh4 f5 16.Qh5+ Kg3 > +- (8.81) Depth: 17/43 00:01:57 206425kN, tb=153 >6...Ke6 7.Kb7 Kf5 8.Kxa6 Kxf4 9.Kb5 f5 10.a6 Kg3 11.a7 Kxh3 12.a8Q Kg3 13.Qd5 h3 >14.f4 Kxf4 15.Kb6 h2 16.Qd6+ Kf3 17.Qxg6 h1Q 18.Qg7 > +- (8.80) Depth: 17/43 00:02:31 266232kN, tb=317 >6...Ke6 7.Kb7 Kf5 8.Kxa6 Kxf4 9.Kb6 Kg3 10.a6 Kxh3 11.a7 Kg3 12.a8Q h3 13.Qa1 f5 >14.Qg1+ Kxf3 15.Qxg6 h2 16.Kc5 Kf2 17.Qxf5+ Kg2 18.Qe4+ Kf2 > +- (7.91) Depth: 17/43 00:05:05 530450kN, tb=425 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 f5 9.Kb5 Kg3 10.a6 Kxh3 11.a7 Kg2 12.a8Q h3 13.Qg8 h2 >14.Qxg6+ Kf2 15.Qh6 Kg1 16.Qg7+ Kf2 17.Qd4+ Kxf3 18.Qh4 Kg2 19.Qg5+ Kf1 20.Qxf5+ >Kg2 21.Qg4+ Kf1 22.Qf3+ > +- (7.90) Depth: 17/43 00:05:33 578273kN, tb=652 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 Kg3 9.Kb5 Kxh3 10.a6 Kg2 11.a7 h3 12.a8Q h2 13.f4+ Kg1 >14.Qa1+ Kg2 15.Qa2+ Kg1 16.Qb1+ Kg2 17.Qe4+ Kg1 18.Qe1+ Kg2 > +- (6.63) Depth: 17/43 00:06:37 688585kN, tb=762 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 Kg3 9.Kb5 Kxh3 10.a6 Kg2 11.a7 h3 12.a8Q h2 13.f4+ Kg1 >14.Qa1+ Kg2 15.Qa2+ Kg1 16.Qb1+ Kg2 17.Qe4+ Kg1 18.Qe1+ Kg2 > +- (6.63) Depth: 17/43 00:06:37 688632kN, tb=766 >6...Kf5 7.Kb7 Kxf4 8.Kxa6 Kg3 9.Kb5 Kxh3 10.a6 Kg2 11.a7 f5 12.a8Q f4 > +- (7.03) Depth: 18/43 00:06:39 690864kN, tb=858 > >(, 10.02.2006)
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