Author: Vasik Rajlich
Date: 03:09:27 02/05/06
Go up one level in this thread
Majd, thanks very much for these interesting comments. As I am working on exactly these problems now, please find a few comments below. On February 04, 2006 at 13:59:32, Majd Al-Ansari wrote: >10_3 tournament 2006 > > 1 > 2 > 3 > 4 >1 Rybka 1.01 Beta 10d 32-bit 53.0 - 31.056.5 - 27.551.5 - 32.5** 161.0/252 >2 Fruit 2.2.1 31.0 - 53.042.5 - 38.542.0 - 38.0 ** 115.5/245 >3 Fritz 9 27.5 - 56.538.5 - 42.543.5 - 35.5 ** 109.5/244 >4 Shredder 9.1 UCI 32.5 - 51.538.0 - 42.035.5 - 43.5 ** 106.0/243 > >Hardware: Pentium 4 3.2 Ghz (2GB RAM) >Book: Fritz 9.ctg >Time: 10 minutes plus 3 sec >Games played: 504 > > >Last time I tried to find some weaknesses in Rybka, it was quite easy. Rybka >was missing some elementary things and lost many points due to that. With >version 10d things have improved quite a bit. Today we have 13b which I have >tried on some of the positions I will mention here and Rybka was able to win the >positions it only drew. Still if I were to point to something is that Rybka can >be dramatically stronger yet. I would say 1 in 10 games Rybka loses ½ point due >to lack of understanding of positions that are trivial for Fritz 9. With 13b >version, EGTB’s will automatically fix a lot of these weaknesses but not all. >Rybka does not evaluate well how active a Queen can be in the ending and does >not look for perpetuals in winning positions. Also Rybka is notorious for not >simplifying into won endings, and can lose many points because of that. I have >a feeling that once endgame knowledge is added, Rybka will be at least 150 ELO >points from the closest competitor. Here are some of the lost opportunities in >this already lopsided tourney, that could have been even more lopsided. There are two things which are special about the endgame: 1) In some endgames, a nominal advantage is useless, or near-useless. (Nobody is yet good enough at chess to say the same about the opening or middlegame.) 2) In other endgames, an advantage is clearly decisive, far more than "normal" (ie. middlegame) heuristics would indicate. Understanding this means simplifying to won endings correctly. Both of these concepts will be in Beta 14, #1 will probably be a bit better than #2. > >Here is the very first game of Rybka in the tourney. As we all know >underpromotion has yet to be implemented in Rybka and guess what … it comes out >in the very first game. > >(419) Rybka 1.01 Beta 10d 32-bit - Shredder 9.1 UCI [B97] >10_3 tournament Home (1.1), 19.01.2006 >[0.00;–0.01] >GenuineIntel 3198 MHzW=20.7 ply; 207kN/s; Fritz9.ctgB=21.1 ply; 696kN/s; >Fritz9.ctg 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 >8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.e5 dxe5 14.Bxf6 gxf6 >15.Ne4 Qxa2 16.Rd1 Be7 17.Be2 0–0 18.0–0 Ra7 19.Rf3 Kh8 20.Rg3 Rd7 21.Qh6 Rxd1+ >22.Bxd1 Rf7 23.Qh5 Qa5 24.Kf1 Qd8 25.Qxf7 Qxd1+ 26.Kf2 Qxc2+ 27.Kf3 Qd1+ 28.Kf2 >Qc2+ 29.Ke3 Bc5+ 30.Nxc5 Qxc5+ 31.Kf3 e4+ 32.Kxe4 Qc2+ 33.Ke3 Qc3+ 34.Kf2 >0.00/16 30 Qd2+ -0.01/15 19 35.Kf3 (Kf1) 0.00/16 11 35...Qd3+ -0.01/17 >31 36.Kg4 (Kf2) 0.00/17 9 36...Qg6+ (Qf5+) -0.54/17 33 37.Qxg6 0.74/19 >6 hxg6 -0.32/22 13 38.Rc3 0.77/21 24 e5+ -0.11/24 47 39.Kg3 0.72/22 >19 Bd7 0.03/24 22 40.Rd3 0.72/22 33 Bf5 0.04/24 24 41.Rd6 0.72/22 40 > Kg7 0.05/24 43 42.Rxc6 0.72/21 39 Bd3 0.04/23 28 43.h4 0.72/20 43 >Kf7 0.04/22 31 44.Kf3 (Rc5) 0.72/20 22 44...f5 0.39/19 26 45.Rd6 >0.72/19 16 Bc4 (Bb5) 0.48/19 25 46.g4 1.13/18 40 a5 0.57/19 19 >47.Rd7+ (gxf5) 1.18/18 20 47...Ke6 0.80/21 39 48.Ra7 1.08/16 3 Bd5+ >0.61/20 18 49.Kg3 1.29/19 20 f4+ 0.61/20 30 50.Kf2 1.20/19 37 e4 >0.78/21 28 51.Rxa5 1.16/18 40 Bc4 0.67/20 13 52.Rc5 (h5) 1.25/17 15 >52...Bd3 0.86/19 13 53.Rc8 (h5) 2.13/17 23 53...Kf7 0.85/18 16 54.Rc6 >(h5) 2.24/18 9 54...Kg7 1.22/19 14 55.g5 2.30/19 11 Kh8 (Bb1) 1.22/20 >10 56.Kg2 2.30/20 9 Kg7 1.29/21 11 57.Rf6 2.30/21 11 f3+ 1.34/23 15 >58.Kg3 (Kf2) 2.30/22 21 58...Bb1 (Bc4) 1.43/23 23 59.Rb6 (Kf4) 2.30/23 >11 59...Bc2 (Bd3) 1.39/21 7 60.Rb7+ (Rc6) 2.30/18 6 60...Kg8 (Kf8) >1.43/22 10 61.Kf2 2.30/20 28 Kh8 (Kf8) 1.49/21 7 62.Rb2 (Ke3) 2.30/21 >6 62...Bd3 1.51/22 6 63.Rb8+ (Ke3) 2.30/22 7 63...Kg7 1.49/21 4 >64.Rb7+ (Ke3) 2.30/22 5 64...Kg8 1.50/20 2 65.Ke3 (Rc7) 2.30/22 7 >65...Bc2 (Bc4) 1.52/21 10 66.Rb2 (Rb6) 2.30/21 7 66...Bd3 1.53/21 17 >67.Rb8+ (Rb6) 2.30/21 10 67...Kf7 1.55/19 6 68.Rb6 (Rb7+) 2.30/21 6 >68...Kg7 1.63/21 30 69.Rb4 (Rc6) 2.30/22 7 69...Kf7 1.64/19 8 70.Rb8 >(Rb7+) 2.30/18 5 70...Bc2 (Ke7) 1.68/21 14 71.Rb6 (Rc8) 2.30/21 9 >71...Kg7 (Bd3) 1.68/21 6 72.Kf2 (Rd6) 2.30/21 5 72...Kf8 (Kf7) 1.68/21 >13 73.Rc6 (Rf6+) 2.30/20 8 73...Bd3 1.74/20 8 74.Rc7 (Ke3) 2.30/22 17 >74...Kg8 (Bb5) 1.75/19 2 75.Ke3 2.30/23 25 Bb5 (Kf8) 1.74/21 12 76.Rc5 >(Rc3) 2.30/20 5 76...Bd3 1.70/20 2 77.Rc6 (Rc8+) 2.30/22 4 77...Kg7 >(Kf7) 1.73/20 2 78.Rc3 (Rd6) 2.30/21 4 78...Bb1 (Kf7) 1.75/21 6 79.Rc7+ > 2.30/19 8 Kf8 1.75/21 3 80.Rc8+ (Rc1) 2.30/20 15 80...Kf7 (Ke7) >1.73/18 1 81.Rc6 (Ra8) 2.30/22 4 81...Kg7 (Bd3) 1.75/21 2 82.Rc1 (Rd6) >2.30/24 4 82...Bd3 1.75/19 1 83.Rc7+ 2.30/24 16 Kf8 (Kg8) 1.75/21 6 >84.Rb7 (Rc3) 2.30/22 10 84...Kg8 (Bc4) 1.75/20 2 85.Ra7 2.30/21 2 Bc2 >(Bc4) 1.75/20 2 86.Kf2 (Ra8+) 2.30/20 3 86...Kf8 1.75/20 2 87.Ra6 >(Ra8+) 2.30/20 5 87...Bd3 (Kf7) 1.75/19 2 88.Rf6+ 2.30/20 3 Kg7 >1.75/22 4 89.Ke1 (Ke3) 2.30/20 2 89...Bc4 (Bc2) 1.75/20 2 90.Rc6 (Kd2) >2.30/19 4 90...Bb5 (Bd3) 1.74/19 2 91.Rc7+ (Rb6) 2.30/19 2 91...Kg8 >(Kf8) 1.76/21 7 92.Re7 2.30/20 35 Bd3 1.75/21 3 93.Kf2 2.30/21 2 Kf8 > 1.76/21 2 94.Re5 (Rd7) 2.30/21 2 94...Kf7 1.79/20 5 95.Ke3 2.30/21 3 >Bc2 1.80/20 3 96.Rb5 (Rd5) 2.30/19 1 96...Bd3 1.80/18 2 97.Rb4 (Rb3) >2.30/20 2 97...Ke6 (Kg8) 1.80/18 8 98.Rb6+ 2.30/16 1 Kf5 (Kf7) 1.05/18 >3 99.Rf6+ 3.86/16 2 Kg4 (Ke5) 1.06/19 2 100.Rf4+ 3.84/16 1 Kg3 >1.06/19 2 101.h5 4.36/17 3 gxh5 0.84/18 3 102.g6 > >[D] 8/8/6P1/7p/4pR2/3bKpk1/8/8 b - - 0 102 > > Rybka plays this ending thinking it is completely winning. It totally >disregards the fact that the h pawn might promote as a Knight. It even gives a >mate at one point. I guess in some positions not knowing about underpromotion >can be a big handicap. As it was this was the very first game in the 504 game >match. 4.42/17 4 102...h4 0.84/17 5 103.Rf5 (g7) 4.42/16 2 103...h3 >0.42/15 3 104.g7 4.42/15 4 Bc4 0.39/16 2 105.Rg5+ 5.30/15 3 Kh4 >0.43/16 0 106.g8Q (Re5) 5.30/16 2 106...Bxg8 0.02/19 2 107.Rxg8 5.30/17 > 2 h2 (Kh5) 0.02/21 3 108.Kf2 (Kf4) 5.36/18 2 Here Rybka is thinking if >the pawn Queens then Rook check and it is all over , but ........ > >[D] 6R1/8/8/8/4p2k/5p2/5K1p/8 b - - 0 108 > >108...h1N+ (h1Q) 0.00/21 3 109.Ke3 0.00/23 1 Ng3 0.00/21 2 110.Rh8+ >(Rf8) 0.00/24 1 110...Kg4 0.00/21 2 111.Rg8+ (Rf8) 0.00/24 0 111...Kh3 >(Kh4) 0.00/21 2 112.Kf2 0.00/24 2 Ne2 (Nh5) 0.00/21 4 113.Ke3 (Re8) >0.00/19 1 ½–½ > The above is simply a bug, will be fixed in Rybka 1.2. > > > >(422) Rybka 1.01 Beta 10d 32-bit - Fritz 9 [B63] >10_3 tournament Home (2.2), 19.01.2006 >[0.11;–0.21] >GenuineIntel 3198 MHzW=15.0 ply; 72kN/s; Fritz9.ctgB=12.8 ply; 1,090kN/s; >Fritz9.ctg 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 >8.0–0–0 0–0 9.Nb3 Qb6 10.f3 Rd8 11.Nb5 Rd7 12.Qe1 a6 13.N5d4 Qc7 14.h4 Nxd4 >-0.21/12 29 15.Nxd4 (Rxd4) 0.11/12 17 15...Rd8 -0.12/12 21 16.Bd3 (g4) >0.15/12 27 16...Bd7 (e5) -0.07/12 20 17.g4 (Qg3) 0.29/11 18 17...Bb5 >(e5) -0.01/12 29 18.Nxb5 0.64/13 2:25 axb5 0.16/13 16 19.Kb1 0.57/13 >31 Rdc8 0.18/12 19 20.a3 (Qd2) 0.61/12 25 20...b4 (Ra4) -0.02/12 15 >21.Qxb4 0.79/12 6 d5 -0.09/13 15 22.Qb3 0.61/13 22 dxe4 -0.11/13 21 >23.Bxe4 0.61/13 3 Nxe4 -0.09/13 26 24.fxe4 0.57/13 13 Bf8 (Bc5) >-0.09/12 14 25.Be3 (Rh3) 0.74/10 15 25...b5 -0.73/13 15 26.Bd2 0.39/11 >19 Qc6 (Ra4) -0.38/13 40 27.Rhe1 (Qd3) 0.34/12 14 27...Ra4 -0.63/13 19 >28.Qd3 0.32/12 12 Qa8 (h6) -0.61/12 16 29.Bc1 0.24/11 16 Ra6 -0.57/13 >24 30.c3 0.00/12 25 b4 -0.48/13 18 31.cxb4 0.00/12 9 Bxb4 -0.35/13 >26 32.Rf1 0.00/12 24 Bd6 (Qb7) -0.35/11 13 33.Qf3 (h5) 0.32/10 14 >33...Qa7 (Qc6) -0.18/12 22 34.Rf2 0.35/10 22 e5 (f6) -0.35/11 18 >35.Rfd2 (Rdf1) 0.71/11 12 35...Be7 (Qe7) 0.40/11 11 36.Rd7 1.32/10 2 >Qc5 0.56/12 11 37.Bg5 (Ka1) 1.47/11 6 37...Qc2+ 0.45/13 13 38.Ka1 >1.30/12 5 Rb8 0.52/12 9 39.R7d2 1.28/13 13 Qc5 1.13/13 12 40.Bxe7 >1.28/13 12 Qxe7 1.08/14 11 41.Rd7 1.39/12 4 Qf8 (Qe8) 1.43/13 8 42.g5 >(Qd3) 1.65/11 12 42...Rba8 1.10/11 7 43.Ka2 (R1d3) 1.71/11 5 43...R6a7 >(Re6) 1.58/12 21 44.Qc3 2.14/12 8 Rxd7 (f6) 1.84/12 13 45.Rxd7 2.29/12 > 2 Re8 (Qe8) 2.31/13 16 46.Qc7 2.52/12 13 f6 (h6) 1.97/12 5 47.a4 >(Qc4+) 2.94/12 6 47...Ra8 (Kh8) 2.07/12 6 48.a5 (gxf6) 2.98/12 9 >48...Kh8 2.29/13 10 49.b4 (h5) 3.49/12 16 49...fxg5 1.88/12 11 50.hxg5 >3.49/12 5 Qf2+ 2.13/12 8 51.Kb3 4.00/12 13 Qg3+ (Qe3+) 2.14/12 11 >52.Ka4 4.00/12 5 Qxg5 2.11/12 6 53.b5 (Rd5) 4.06/12 13 53...Re8 (h5) >1.38/11 8 54.a6 (Qc2) 4.59/10 9 54...Ra8 (Qg2) 6.61/11 13 > >[D] r6k/2QR2pp/P7/1P2p1q1/K3P3/8/8/8 w - - 0 55 > > > 55.b6? For some reason in some position Rybka does not simplify into an easily >won endgame that snuffs out any chances for the other side. a7! wins outright. >with b6? Rybka allows Fritz to complicate the issue slightly. 5.15/10 7 >55...Rxa6+! (Qh4) 3.66/12 5 56.Kb5 (Kb4) 4.93/10 6 56...Rxb6+! > >[D] r6k/2QR2pp/P7/1P2p1q1/K3P3/8/8/8 w - - 0 55 > >Although this will still lose, it is the best chance for black. The white king >is exposed and if not careful a perpetual with the Queen is possible. 3.72/14 >11 57.Qxb6 4.87/11 7 h5 3.79/13 9 58.Qd6 (Rd5) 4.78/10 15 58...Kh7 >(Qg4) 3.63/12 4 59.Rd8 (Rf7) 4.62/10 6 59...Qf4 (h4) 3.32/11 8 60.Qd5 >4.77/9 6 Kh6 (g6) 3.36/11 8 61.Rh8+ (Re8) 5.00/8 3 61...Kg5 3.31/11 3 >62.Qd8+ (Kc6) 4.87/9 7 62...Kg4 (Qf6) 3.31/11 5 > >[D] 3Q3R/6p1/8/1K2p2p/4Pqk1/8/8/8 w - - 0 63 > >63.Rf8?? The only thing that white has to worry about is to not allow a >perpetual with the Queen and that is exactly what he does. Qd1+ keeping the >pawn that is blocking a lot of squares on wins easily. Now black has a >perpetual. Another 1/2 point wasted. 4.87/8 4 63...Qxe4 1.67/10 9 64.Qd7+ >(Qc8+) 4.84/8 2 64...Kh4 1.57/11 9 65.Qxg7 4.80/8 1 Qd5+ 1.68/12 5 >66.Kb4 (Kb6) 4.79/10 4 66...Qd4+ 1.50/11 2 67.Kb3 (Ka5) 4.35/12 4 >67...Qd3+ 0.00/13 5 68.Kb2 4.35/12 4 Qd2+ 0.00/13 4 69.Kb1 4.14/13 5 >Qd1+ 0.00/13 4 70.Ka2 4.07/14 3 Qd2+ (Qe2+) 0.00/13 4 71.Ka3 4.05/15 >14 Qd3+ 0.00/13 4 72.Ka4 3.98/15 5 Qa6+ (Qd4+) 0.00/13 4 73.Kb4 >0.00/17 3 Qb6+ 0.00/13 3 74.Kc4 (Kc3) 0.00/16 3 74...Qd4+ 0.00/13 3 >75.Kb3 0.00/69 0 Qd3+ 0.00/13 3 76.Kb2 0.00/69 0 Qd2+ 0.00/13 4 >77.Kb1 0.00/69 0 Qd1+ 0.00/13 3 ½–½ > Yes, this is related to understanding clear endgame wins. > > > > >(454) Rybka 1.01 Beta 10d 32-bit - Fruit 2.2.1 [B80] >10_3 tournament Home (18.3), 20.01.2006 >[0.31;–0.02] >GenuineIntel 3198 MHzW=14.0 ply; 115kN/s; Fritz9.ctgB=16.0 ply; 859kN/s; >Fritz9.ctg 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6 7.f3 b5 8.g4 >h6 9.Qd2 Nbd7 10.0–0–0 Bb7 11.h4 b4 12.Na4 Qa5 13.b3 Nc5 14.a3 Nxa4 15.axb4 Qc7 >16.bxa4 d5 17.e5 Nd7 18.f4 Nb6 19.Rh3 h5 20.gxh5 Nxa4 21.Bf2 Rc8 22.Be1 Rxh5 >23.Be2 Rh6 24.f5 exf5 25.Qg5 g6 -0.02/12 46 26.h5 (Ra3) 0.31/11 21 >26...Bg7 (Rh7) 0.21/11 24 27.Re3 (Rdd3) 0.82/11 27 27...Qe7 (Nb6) 0.65/12 > 35 28.Qxe7+ 1.02/10 5 Kxe7 0.16/4 0 29.b5 (Bh4+) 0.95/12 17 29...axb5 > 0.66/12 13 30.Bb4+ 0.99/12 26 Kd8 0.84/13 21 31.hxg6 1.00/13 55 Rxg6 > 0.80/13 24 32.Ba5+ (Nxf5) 1.18/12 24 32...Ke7 0.72/13 14 33.Nxf5+ >1.32/12 16 Ke6 0.75/14 23 34.Nd4+ 1.28/12 24 Ke7 0.78/14 22 35.Bb4+ >2.15/12 37 Kd8 0.71/14 16 36.Rf3 (Nf5) 1.78/12 30 36...Bxe5 (f5) >1.55/13 58 37.Rxf7 3.65/10 10 Bxd4 (Ba6) 1.65/12 12 38.Rxd4 4.41/11 15 > Bc6 (Rg1+) 3.44/13 33 39.Rh4 4.26/11 13 Bd7 3.59/13 10 40.Bxb5 (Rhh7) >4.45/12 18 40...Nb6 3.23/12 14 41.Bxd7 4.53/12 11 Nxd7 3.38/14 16 >42.Rhh7 4.49/13 15 Kc7 3.48/14 15 43.Rxd7+ 4.44/13 27 Kc6 3.74/15 11 >44.Ra7 (Kb2) 4.38/13 1:22 44...Kb6 (Kb5) 3.48/13 15 45.Kb2 (Rhb7+) >4.57/10 12 45...Rg4 (Rb8) 3.48/12 17 46.Bc3 (Kb3) 4.60/11 28 46...Rb8 >(Re8) 3.40/12 10 47.Be5 (Ra5) 4.76/9 2 47...Re8 (Rc8) 3.57/13 9 >48.Rab7+ 4.77/12 15 Ka6 3.75/15 24 49.Bb8 (Bd6) 4.78/12 18 49...Ree4 >3.69/14 13 50.Ra7+ (Ba7) 4.76/11 13 50...Kb5 3.69/13 12 51.Ra3 (Rhd7) >4.72/11 28 51...Rb4+ 3.47/11 9 52.Kc3 4.76/13 22 Rgc4+ (Kc6) 3.52/12 9 > 53.Kd2 4.76/11 5 Rd4+ 3.52/13 11 54.Ke3 (Rd3) 4.76/12 14 54...Rh4 >(Re4+) 3.48/13 13 55.Rb7+ 4.70/10 6 Kc6 (Kc4) 3.47/15 9 56.Rxb4 >4.76/11 1 Rh3+ (Rxb4) 3.56/16 9 57.Kd2 (Ke2) 4.58/13 5 57...Rxa3 >3.56/17 2 58.Rd4 (Be5) 4.23/13 8 58...Ra8 (Kb5) 3.53/16 5 59.Bf4 >4.09/14 10 Ra1 (Re8) 3.55/18 8 60.c3 (Rb4) 4.50/13 5 60...Ra2+ (Kb5) >3.56/19 10 61.Kd3 4.42/15 4 Ra8 (Kb5) 3.65/17 8 62.Bg5 (Rb4) 4.53/14 4 > 62...Ra1 (Rg8) 3.66/17 5 63.Be3 (Rh4) 4.49/13 4 63...Rd1+ 3.71/18 11 >64.Bd2 (Ke2) 4.25/13 1 64...Rh1 (Ra1) 3.66/18 12 65.Rf4 (Rg4) 4.42/13 5 >65...Kd7 (d4) 3.71/18 9 66.Rf6 (Rg4) 4.60/13 7 66...Rd1 > >[D] 8/3k4/5R2/3p4/8/2PK4/3B4/3r4 w - - 0 67 > > For some reason Rybka cannot win this easily won endgame. It has no plan and >no knowledge of how to proceed. All it has to do is to keep the black King >locked out with the Rook and put Black Bishop in combination on point with the >white pawn. Then move its King forward and eat the helpless black pawn and just >slowly progress forward with pawn until the black Rook has to be sacrificed. >Here is an example of how this should end. 3.83/18 9 67.Rh6 4.80/12 4 >[67.Kc2 Ra1 68.Be3 Rh1 69.Bd4 Ke7 70.Kb3 Rb1+ 71.Ka4 Rb8 72.Rb6 Rg8 73.Kb5 Kd7 >74.Kc5 Rg5 75.Rd6+ Kc7 76.Rxd5 Rg6 77.c4 Re6 78.Be5+ Kc8 79.Kd4 Ra6 80.c5 Ra4+ >81.Ke3 Rc4 82.Bd6 Kb7 83.Rd4 Rc1 84.Ke4 Kc6 85.Ra4 Re1+ 86.Kf5 Kd5 87.Kf6 Re6+ >88.Kf7 Re1 89.Ra7 Re2 90.Re7 Rg2 91.Ke8 Kc6 92.Rc7+ Kb5 93.Kd7 Kc4 94.Kc6 Kd3 >95.Rf7 Rc2 96.Kd7 Kc4 97.c6 Rc1 98.c7 Rc2 99.c8Q+ Kd3 100.Qxc2+ Kxc2 101.Rf3 Kd2 >102.Bf4+ Kc2 103.Kd6 Kd1 104.Rf2 Ke1 105.Be3 Kd1 106.Kd5 Ke1 107.Kd4 Kd1 108.Kd3 >Ke1 109.Rf8 Kd1 110.Rf1#] 67...Ke7 (Rg1) 3.87/18 8 68.Rh2 (Ke2) 4.78/12 4 >68...Kd6 (Ra1) 3.72/18 5 69.Kd4 4.79/12 2 Kc6 (Ra1) 3.87/19 5 70.Rg2 >(Rh6+) 4.68/14 8 70...Kd6 (Ra1) 3.86/20 8 71.Rg6+ (Re2) 4.69/14 6 >71...Ke7 (Kd7) 3.78/16 6 72.Kd3 4.71/12 1 Kd7 (Rh1) 3.74/18 5 73.Rg4 >(Rb6) 4.69/13 5 73...Kd6 (Rh1) 3.66/16 5 74.Rh4 (Rg8) 4.78/13 3 >74...Ke6 3.66/17 7 75.Rh5 (Rh8) 4.76/14 5 75...Rg1 (Ra1) 3.75/17 7 >76.Rh3 (Bf4) 4.75/14 5 76...Ke5 (Rg4) 3.75/17 8 77.Be3 4.97/14 3 Rd1+ >3.85/16 3 78.Ke2 (Kc2) 4.98/16 6 78...Ra1 (Rb1) 4.30/18 15 79.Bd4+ >4.97/16 6 Ke4 (Kf4) 4.30/18 4 80.Rh4+ 4.97/14 1 Kf5 3.58/4 0 81.Kf3 >(Rh8) 4.97/16 7 81...Rf1+ 3.76/15 5 82.Kg3 (Ke3) 4.97/17 4 82...Re1 >3.82/16 7 83.Rh5+ (Rh6) 4.97/17 5 83...Ke6 (Kg6) 3.85/17 5 84.Kf4 (Rh6+) > 5.18/14 2 84...Re4+ (Rf1+) 3.85/17 4 85.Kg5 5.18/17 3 Kd6 (Kd7) >4.20/17 6 86.Rh8 (Rh6+) 5.18/17 5 86...Kd7 4.18/17 5 87.Rb8 (Rh7+) >5.18/17 3 87...Kc7 (Re8) 4.18/17 4 88.Ra8 5.18/15 3 Kd7 (Re1) 4.27/17 >7 89.Ra1 (Bf6) 5.18/17 3 89...Ke6 (Re8) 4.18/17 5 90.Ra2 (Ra6+) 5.18/16 >4 90...Re1 (Kd7) 4.17/17 3 91.Ra7 (Ra6+) 5.18/16 4 91...Kd6 4.17/16 4 >92.Ra6+ 5.18/15 1 Kd7 (Kc7) 4.17/17 3 93.Kf4 (Kf5) 5.18/17 3 93...Re4+ >(Rf1+) 4.18/16 4 94.Kf5 5.18/17 1 Re1 (Re8) 4.20/17 3 95.Rg6 (Rh6) >5.18/15 3 95...Rh1 (Rf1+) 4.18/16 3 96.Kg4 (Rf6) 5.18/15 2 96...Re1 >(Rh2) 4.17/15 3 97.Rb6 (Rf6) 5.18/17 3 97...Rh1 (Re8) 4.17/17 5 98.Kf4 >(Rf6) 5.18/17 4 98...Rh4+ (Rf1+) 4.18/17 3 99.Kf5 (Kg5) 5.18/17 3 >99...Rh5+ 4.17/17 4 100.Kg6 (Kf6) 5.18/18 31 100...Rh1 4.15/15 3 >101.Kg5 (Rf6) 5.16/17 23 101...Re1 4.17/17 5 102.Rh6 (Kf4) 5.17/14 3 >102...Rf1 (Re8) 4.15/16 4 103.Rh8 (Rf6) 5.16/13 2 103...Kc6 3.89/14 3 >104.Rb8 (Ra8) 5.16/12 4 104...Kc7 (Re1) 3.93/16 3 105.Rb6 4.81/10 2 Rc1 >(Re1) 3.92/16 8 106.Rh6 4.42/10 3 Re1 3.72/14 5 107.Rh4 (Kg4) 4.42/11 >3 107...Kc6 (Re4) 0.28/15 13 108.Rf4 (Kf5) 4.01/12 1 108...Kb5 0.25/14 >3 109.Rf5 (c4+) 4.01/14 2 109...Kc4 (Re8) 0.00/26 3 110.Rf7 Another >wasted opportunity for Rybka and another 1/2 point lost. 0.00/33 1 ½–½ > This is not so easy to fix. I tried one idea which did not really work. This needs some more thinking. > > > > >(460) Fruit 2.2.1 - Rybka 1.01 Beta 10d 32-bit [C89] >10_3 tournament Home (21.3), 20.01.2006 >[–0.41;–0.22] >GenuineIntel 3198 MHzW=19.3 ply; 897kN/s; Fritz9.ctgB=17.7 ply; 194kN/s; >Fritz9.ctg 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0–0 Be7 6.Re1 b5 7.Bb3 0–0 >8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 >15.Be3 Bg4 16.Qd3 Rae8 17.Nd2 Re6 18.a4 Qh5 19.axb5 axb5 20.Qf1 Bh3 21.Bd1 Qf5 >22.Qe2 c5 23.Nf1 cxd4 24.cxd4 Nb4 25.Ra3 Nc6 26.Rd3 Bb4 27.d5 Re5 -0.22/13 30 >28.Nd2 -0.41/13 15 Rxd5 -0.31/14 29 29.Bc2 -0.32/14 20 Re8 -0.39/14 >1:11 30.Ra1 -0.56/13 17 Rde5 -0.32/13 33 31.Qf3 (Rc1) -0.43/13 21 >31...Qc8 -0.65/12 23 32.Bb3 (Rc1) -0.59/13 29 32...Rf5 -1.18/13 17 >33.Qd1 -1.67/14 26 Ne5 -1.15/13 28 34.Rd5 (Rc1) -1.67/13 18 34...Bg4 >(Bxd2) -1.90/12 24 35.Qc1 -1.47/13 14 Qxc1+ -1.89/13 22 36.Rxc1 >-1.44/15 24 Bxd2 -1.93/15 31 37.Rxd2 -1.38/15 23 Nf3+ -1.94/14 14 >38.Kf1 (Kg2) -1.44/14 22 38...Nxd2+ -2.05/11 4 39.Bxd2 -1.53/14 10 h6 >-2.11/13 16 40.f4 -1.39/14 16 Rh5 (Rf6) -2.09/14 13 41.h4 -1.39/16 17 >Rd8 (Be6) -1.87/14 28 42.Be1 -1.23/15 18 Rc8 -2.11/14 11 43.Rxc8+ >-1.24/17 19 Bxc8 -2.15/15 4 44.Kf2 -1.27/18 11 Rc5 -2.29/16 10 45.Bb4 > -1.30/18 12 Rc1 -2.34/18 16 46.Bd2 -1.37/18 11 Rb1 -2.39/18 12 >47.Bc3 > >[D] 2b3k1/5pp1/7p/1p6/5P1P/1BB3P1/1P3K2/1r6 b - - 0 47 > > Here again Rybka does not know how to win this position. He is the exchange up >with equal number of pawns. The idea should be simple, exchange the white >bishop if possible and let the Rook out muscle the remaining Bishop. Or advance >the pawns and let the King be in a bad position so that you can exchange the >Rook for the white black squared Bishop for a won Bishop ending. Here is an >example of how to win it -1.44/18 12 47...Bb7 (b4) -2.62/17 26 [47...Be6 >48.Bxe6 fxe6 49.h5 Rd1 50.g4 Kf7 51.Ke2 Rd5 52.Ke3 g6 53.hxg6+ Kxg6 54.Ke4 h5 >55.gxh5+ Rxh5 56.Be5 Rh3 57.Bc3 Rh2 58.Be5 Rc2 59.Bd4 b4 60.Kd3 Rc1 61.Be3 Rc8 >62.Ke4 Rc7 63.Bd4 b3 64.Ke5 Rc4 65.Ke4 Kh5 66.Kd3 Rc1 67.Bc3 Kg4 68.Kc4 Kxf4 >69.Kxb3 Rd1 70.Ka4 e5 71.b4 e4 72.b5 e3 73.Ka5 Ke4 74.Ka6 e2 75.Ka7 Kd3 76.Bf6 >(76.Bb2) 76...e1Q 77.b6 Qa5+ 78.Kb7 Rb1 79.Bd8 Qd5+ 80.Kc8 Qc6+ 81.Kb8 Ra1 82.b7 >Rb1 83.Bb6 Rxb6 84.Ka7 Qxb7#] 48.Bc2 -1.37/17 18 Rh1 -2.62/17 8 49.Bf5 >-1.52/17 16 Bc6 (Bd5) -2.74/17 18 50.b4 -1.46/16 9 g6 -2.74/18 10 >51.Bd3 -1.50/18 12 f5 -2.74/18 9 52.Be2 (Bf1) -1.51/18 8 52...Rb1 (Kf7) > -2.75/18 11 53.h5 -1.44/19 14 Kf7 (Rb3) -2.76/18 11 54.Be1 -1.44/18 >13 gxh5 -2.76/18 10 55.Bxh5+ -1.48/19 10 Ke6 -2.76/19 8 56.Be2 >-1.51/20 13 Rb3 -2.77/19 11 57.Bd2 (Bd1) -1.54/20 48 57...Kf6 (Bd5) >-2.77/17 9 58.Be1 (Bh5) -1.49/18 6 58...Kg6 (Ke7) -2.76/19 14 59.Bd1 >(Bd2) -1.51/20 14 59...Ra3 (Rb2+) -2.77/20 8 60.Be2 -1.51/20 6 Kg7 >-2.76/17 8 61.Bd2 -1.51/20 10 Rb3 -2.77/18 5 62.Be1 (Bh5) -1.51/20 22 >62...Kf6 -2.77/20 9 63.Bd1 (Bd2) -1.50/20 10 63...Ra3 -2.76/19 10 >64.Bh5 (Be2) -1.54/20 15 64...Bd5 -2.77/18 6 65.Be2 -1.53/20 5 Bc4 >-2.77/18 6 66.Bh5 (Bf3) -1.54/20 5 66...Ke6 -2.77/17 7 67.Bf3 -1.54/21 >9 Rb3 (Rd3) -2.77/18 13 68.Bd2 -1.54/18 5 Ke7 (Kd6) -2.77/18 8 69.Be3 >(Be1) -1.40/17 6 69...Rb2+ -2.78/16 5 70.Ke1 -1.40/18 9 Kd6 (Ke6) >-2.78/16 7 71.Bc5+ -1.40/18 4 Ke6 -2.78/17 9 72.Bf8 -1.40/19 4 Bd3 >(Kf7) -2.78/17 7 73.Bc5 -1.40/18 5 Rc2 (Ra2) -2.78/17 4 74.Bd1 (Bd4) >-1.40/19 6 74...Rh2 -2.78/18 4 75.Bf3 -1.40/20 8 Rb2 -2.78/17 4 >76.Bc6 -1.40/18 8 Re2+ (Rc2) -2.78/17 4 77.Kf1 (Kd1) -1.40/19 6 >77...Bc4 -2.78/18 7 78.Bf3 -1.40/19 5 Ra2+ -2.78/18 5 79.Ke1 -1.41/21 >8 Rc2 (Bd5) -2.78/19 9 80.Bc6 (Be3) -1.40/18 5 80...Re2+ -2.78/17 4 >81.Kf1 (Kd1) -1.40/20 6 81...Bd3 (Ra2+) -2.78/18 5 82.Bf3 -1.40/20 3 >Ra2+ -2.78/19 12 83.Ke1 -1.40/21 7 Rh2 (Ra3) -2.78/19 7 84.Bd4 (Bg1) >-1.40/18 4 84...Ke7 (Bc4) -2.78/18 6 85.Bc5+ -1.40/17 3 Kd7 (Kf7) >-2.78/18 3 86.Bd4 (Bf2) -1.40/18 3 86...Rc2 (Bc4) -2.78/18 3 87.Bg7 >(Bc5) -1.40/16 5 87...Rc4 -2.78/15 3 88.Bf8 -1.40/17 3 Ke8 -2.78/16 3 > 89.Bc5 -1.40/18 4 Rc2 -2.78/17 4 90.Bc6+ (Bd4) -1.40/17 3 90...Kd8 >-2.78/18 3 91.Bf3 -1.40/19 6 Kd7 -2.78/18 3 92.Kd1 (Be3) -1.40/19 6 >92...Rh2 (Ra2) -2.78/18 4 93.Ke1 -1.40/19 3 Rb2 (Ra2) -2.78/17 4 94.Kd1 >(Bd1) -1.40/18 4 94...Bc4 -2.78/17 8 95.Ke1 -1.40/19 5 Rh2 (Ra2) >-2.78/18 3 96.Bd4 (Bf2) -1.40/18 3 96...Ke7 -2.78/16 2 97.Bc5+ (Be5) >-1.40/18 4 97...Kf6 (Kf7) -2.78/15 3 98.Bd4+ -1.40/19 6 Kf7 -2.78/16 4 > 99.Kd1 (Bh8) -1.39/15 3 99...h5 (Ke6) -2.83/15 4 100.Ke1 -1.69/15 4 h4 > -2.84/17 3 101.gxh4 -1.69/17 4 Rxh4 -2.84/17 1 102.Be5 -1.69/19 3 >Rh2 -2.84/16 1 103.Bd4 (Bb7) -1.69/20 3 103...Ke6 (Ke7) -2.84/16 2 >104.Be5 (Bc6) -1.69/20 4 104...Bd3 (Ra2) -2.84/17 3 105.Bd4 -1.69/20 4 >Ra2 -2.84/17 3 106.Be5 (Bd1) -1.69/18 3 106...Rc2 (Bc4) -2.84/18 3 >107.Bd1 -1.69/21 3 Rh2 -2.84/20 4 108.Bf3 -1.69/22 6 Bc4 -2.84/17 2 >109.Bd4 (Bc6) -1.69/21 3 109...Ra2 (Kd7) -2.84/18 4 110.Be5 -1.69/21 4 >Bd3 (Kd7) -2.84/19 3 111.Bh5 (Bd1) -1.69/21 4 111...Ke7 -2.84/18 3 >112.Bd1 (Bf3) -1.69/22 5 112...Rh2 -2.84/19 3 113.Bf3 -1.69/21 4 Rc2 >(Bc4) -2.84/19 2 114.Bd4 (Bd1) -1.69/18 5 114...Kd7 (Ke6) -2.84/16 3 >115.Bc5 -1.69/20 3 Rb2 (Ke6) -2.84/17 4 116.Bf8 (Kd1) -1.69/20 3 >116...Rh2 (Ke6) -2.84/17 5 117.Bc5 (Bg7) -1.69/22 4 117...Rc2 (Bc4) >-2.84/18 3 118.Kd1 (Bf8) -1.69/21 4 118...Kd8 (Ra2) -2.84/16 3 119.Ke1 >(Bc6) -1.69/19 3 119...Rb2 (Rh2) -2.84/17 2 120.Kd1 (Bf8) -1.69/19 2 >120...Kc7 (Rh2) -2.84/18 4 121.Ke1 -1.69/20 3 Bc4 (Ra2) -2.84/18 2 >122.Bh5 (Be7) -1.69/19 3 122...Kc6 (Kd7) -2.84/17 4 123.Bf3+ -1.69/20 4 >Kd7 -2.84/20 3 124.Bh5 (Bd1) -1.69/21 2 124...Bd3 (Ra2) -2.84/19 3 >125.Bf3 -1.69/22 3 Ke6 (Ra2) -2.84/20 4 126.Bc6 -1.69/20 3 Bc4 (Ra2) >-2.84/19 2 127.Bf3 -1.69/20 3 Rc2 (Ra2) -2.84/18 2 128.Bc6 (Bd4) >-1.69/20 3 128...Re2+ (Rh2) -2.84/18 4 129.Kd1 -1.69/21 2 Rb2 (Rh2) >-2.85/15 3 130.Ke1 (Bb7) -1.69/21 4 130...Rh2 -2.84/20 4 131.Bf3 (Bd4) >-1.69/22 5 131...Ra2 -2.84/18 3 132.Bc6 (Bd4) -1.69/22 5 132...Bd3 >-2.84/19 3 133.Kd1 (Bf3) -1.69/22 5 133...Rh2 (Re2) -2.84/18 3 134.Ke1 >-1.69/21 4 Re2+ -2.84/20 3 135.Kd1 -1.69/23 3 Bc4 -2.84/21 5 136.Bf3 >(Bd4) -1.69/22 3 136...Ra2 -2.84/21 4 137.Bc6 (Ke1) -1.69/21 4 >137...Bd3 -2.84/17 2 138.Ke1 -1.69/22 5 Rh2 -2.84/18 2 139.Bd4 (Bf3) >-1.69/21 5 139...Kd6 -2.84/19 2 140.Bf3 -1.69/21 4 Ra2 (Bc4) -2.84/19 >2 141.Be5+ (Bc5+) -1.69/20 2 141...Kd7 -2.84/20 31 142.Bd4 (Bd1) >-1.69/20 4 142...Bc4 -2.84/18 3 143.Be5 (Bf6) -1.69/18 4 143...Ke7 (Ke6) > -2.84/15 2 144.Bd4 -1.69/16 4 Rc2 (Kf7) -2.75/14 4 145.Bc5+ (Be5) >-1.65/15 3 145...Kd8 (Kd7) -2.55/13 3 146.Bd4 (Bc6) -1.67/16 2 146...Kd7 >(Rh2) -2.78/12 3 147.Bh5 (Be5) -1.65/15 2 147...Kd6 (Ra2) -2.79/11 2 >148.Bf3 -0.67/15 2 Ke6 -2.48/13 2 149.Bc6 (Bc5) -1.51/17 3 149...Bb3 >-2.63/14 2 150.Bxb5 -1.53/17 4 Kd5 -2.84/14 1 151.Be5 (Bc5) -1.54/17 5 > 151...Ke4 -2.83/14 2 152.Bd6 Rybka gives up and takes a draw. Another 1/2 >point lost. -1.58/17 4 ½–½ > Same issue as the previous. > > > >(514) Rybka 1.01 Beta 10d 32-bit - Fruit 2.2.1 [D48] >10_3 tournament Home (48.3), 21.01.2006 >[–0.18;–0.02] >GenuineIntel 3198 MHzW=17.6 ply; 311kN/s; Fritz9.ctgB=36.6 ply; 1,187kN/s; >Fritz9.ctg 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 >8.Bd3 Bb7 9.0–0 a6 10.e4 c5 11.d5 Qc7 12.dxe6 fxe6 13.Bc2 c4 14.Ng5 Nc5 15.e5 >Qxe5 16.Re1 Qd6 17.Qxd6 Bxd6 18.Be3 0–0 19.Rad1 Be7 20.Bxc5 Bxc5 21.Nxe6 Rfc8 >22.h3 Rab8 23.a3 Bb6 24.Rd6 Ba5 25.Re3 b4 26.axb4 Bxb4 27.Rd4 Re8 28.Bd1 >-0.18/11 25 Bxc3 -0.02/14 20 29.bxc3 -0.26/15 23 Nd5 -0.19/15 17 >30.Re5 -0.52/15 26 Nxc3 -0.17/15 20 31.Bh5 (Bg4) -0.18/15 29 31...g6 >-0.60/16 27 32.Rxc4 -0.19/14 9 Rbc8 -0.10/15 20 33.Rec5 -0.15/14 16 >Nb5 -0.08/15 22 34.Bd1 (Bg4) -0.08/14 20 34...Rb8 (Rxc5) -0.01/15 22 >35.Bb3 -0.10/15 33 Rxe6 -0.08/15 14 36.Rxb5 -0.02/15 20 Re1+ 0.00/15 >14 37.Kh2 0.01/2 0 axb5 0.00/17 15 38.Rc8+ 0.00/16 21 Kg7 -0.28/4 0 >39.Rxb8 0.00/17 7 Re7 0.00/17 12 40.Kg3 0.02/17 39 Rd7 (Kf6) 0.00/16 >18 41.f3 0.09/14 15 Kf6 (b4) 0.14/15 22 42.Kf4 0.15/14 14 Rc7 (b4) >0.18/15 26 43.h4 (Rf8+) 0.28/14 12 43...Bc6 (b4) 0.22/15 10 44.Rb6 >0.67/17 25 Ke7 0.48/16 11 45.Ke5 0.85/17 37 Bd7 0.41/16 13 46.g4 (h5) > 0.92/16 11 46...Rc1 0.52/15 20 47.Bd5 1.09/15 15 Rc2 (Rc5) 0.62/15 15 > 48.Rb7 (h5) 1.30/15 24 48...h5 (Rc1) 0.90/16 22 49.g5 1.34/16 11 Rd2 >(Rc5) 1.28/16 15 50.Rb6 1.91/16 14 Be8 1.32/17 12 51.Be4 2.02/16 10 >b4 (Re2) 1.33/17 27 52.Rxb4 (f4) 2.11/17 16 52...Rd6 1.35/17 10 53.Rb7+ >(Bd5) 2.16/17 14 53...Bd7 1.53/19 8 54.f4 2.27/18 16 Re6+ 1.49/19 15 >55.Kd4 2.46/18 14 Rd6+ 1.98/19 36 56.Ke3 2.43/18 15 Kd8 1.98/19 13 >57.Rb8+ 2.30/17 14 Ke7 1.74/18 9 58.Rh8 2.28/15 8 Be8 (Re6) 1.74/17 >13 59.Rh7+ 2.60/15 12 Kf8 (Kd8) 1.73/18 12 60.Rh6 2.61/15 6 Rb6 (Ke7) >1.78/17 8 61.f5 3.10/16 10 Rb3+ 1.77/17 12 62.Kf4 3.14/16 9 gxf5 >1.77/17 11 63.Bxf5 2.83/15 9 Rb4+ 2.03/16 8 64.Ke5 2.67/16 6 Bf7 >2.15/17 15 65.g6 (Ra6) 2.54/15 10 65...Bxg6 (Bg8) 0.52/17 6 > >[D] 5k2/8/6bR/4KB1p/1r5P/8/8/8 w - - 0 66 > >66.Kf6?? A terrible mistake by Rybka. It does not understand that even with a >Bishop and a pawn, it cannot win if the black King controls h8. Another 1/2 >point lost due to lack of endgame knowledge. The simple RxB wins easily. >3.86/19 7 66...Rb6+ 0.00/23 7 67.Kg5 3.85/22 2 Kg7 (Bxf5) 0.00/25 9 >68.Rxg6+ (Bd3) 4.80/21 5 68...Rxg6+ 0.00/34 2 69.Bxg6 4.80/19 17 Kg8 >0.00/44 6 70.Kf6 (Bxh5) 4.91/22 1:40 70...Kh8 0.00/44 2 71.Be4 (Bxh5) >4.91/16 3 71...Kg8 0.00/4 0 72.Bh1 (Ke5) 4.91/18 2 72...Kh7 (Kh8) >0.00/46 5 73.Kf5 (Ke5) 4.91/18 2 73...Kh8 (Kg8) 0.00/48 8 74.Ke5 (Ke4) >4.91/19 2 74...Kh7 (Kg8) 0.00/51 6 75.Be4+ (Kd4) 4.91/19 2 75...Kg7 >0.00/52 8 76.Kf5 (Kd4) 4.91/13 3 76...Kg8 (Kf7) 0.00/53 8 77.Bd5+ (Kf4) >4.91/23 2 77...Kg7 0.00/55 8 78.Ke6 (Ke4) 4.91/27 2 78...Kh8 (Kg8) >0.00/55 6 79.Bf3 (Ke5) 4.91/23 3 79...Kg7 (Kg8) 0.00/54 9 80.Kf5 (Bxh5) >4.91/26 2 80...Kh7 (Kf7) 0.00/55 8 81.Bd1 (Bxh5) 4.91/30 3 81...Kg7 >0.00/54 5 82.Ke5 (Bxh5) 4.91/31 3 82...Kh8 (Kf7) 0.00/56 8 83.Bc2 (Bxh5) > 4.91/32 3 83...Kg7 (Kg8) 0.00/57 8 84.Be4 (Kd4) 4.91/29 2 84...Kg8 >(Kf7) 0.00/58 8 85.Bd5+ (Kd4) 4.91/27 2 85...Kg7 0.00/58 5 86.Bc6 (Kd4) > 4.91/35 5 86...Kh7 (Kf7) 0.00/59 7 87.Kf5 (Kd4) 4.91/36 5 87...Kg7 >0.00/58 7 88.Ba4 (Ke4) 4.91/25 2 88...Kg8 (Kf7) 0.00/57 7 89.Kg6 (Kg5) >4.91/35 4 89...Kh8 0.00/56 7 90.Bb5 (Kxh5) 4.91/36 7 90...Kg8 0.00/4 0 > 91.Bf1 (Kxh5) 4.91/37 2 91...Kh8 0.00/57 7 92.Bg2 (Kxh5) 4.91/36 2 >92...Kg8 0.00/4 0 93.Bd5+ (Kxh5) 4.91/30 3 93...Kh8 0.00/57 7 94.Be4 >(Kxh5) 4.91/29 3 94...Kg8 0.00/4 0 95.Bh1 (Kxh5) 4.91/39 34 95...Kh8 >0.00/57 7 96.Kg5 (Kxh5) 4.91/37 3 96...Kg8 0.00/57 6 97.Bd5+ (Kxh5) >4.91/32 1 97...Kg7 (Kh8) 0.00/58 6 98.Kf5 (Kxh5) 4.91/29 1 98...Kh7 >(Kh8) 0.00/57 6 99.Bg2 (Ke4) 4.91/21 1 99...Kh8 (Kg8) 0.00/57 6 100.Kf6 >(Ke4) 4.91/13 2 100...Kg8 0.00/55 5 101.Bh3 (Ke5) 4.91/20 1 101...Kh7 >(Kh8) 0.00/56 6 102.Bf5+ (Ke5) 4.91/19 1 102...Kg8 (Kh6) 0.00/55 5 >103.Bd7 (Kg5) 4.91/19 3 103...Kh8 0.00/57 6 104.Be8 (Ke5) 4.91/17 3 >104...Kg8 (Kh7) 0.00/56 5 105.Bb5 (Bxh5) 4.91/18 1 105...Kh7 0.00/58 4 >106.Bd3+ (Ke5) 4.91/15 2 106...Kg8 0.00/59 5 107.Bc2 (Ke5) 4.91/12 1 >107...Kh8 0.00/58 5 108.Bb1 (Ke5) 4.91/12 3 108...Kg8 0.00/4 0 109.Bf5 >(Ke5) 4.91/14 2 109...Kh8 0.00/57 5 110.Bc2 (Kg5) 4.91/12 4 110...Kg8 >0.00/4 0 111.Bb3+ (Ke5) 4.91/11 2 111...Kh8 (Kh7) 0.00/58 5 112.Bd1 >(Ke5) 4.91/11 2 112...Kh7 (Kg8) 0.00/58 5 113.Bf3 (Bxh5) 4.09/12 12 >113...Kg8 (Kh6) 0.00/57 5 114.Bg2 (Bxh5) 4.09/10 3 114...Kh7 (Kh8) >0.00/56 5 115.Bh1 (Ke5) 4.09/11 2 115...Kg8 0.00/57 3 116.Bf3 (Ke5) >4.09/12 4 116...Kh7 0.00/58 5 117.Bxh5 4.09/11 2 Kg8 (Kh6) 0.00/63 0 >118.Ke5 4.09/9 2 Kg7 (Kf8) 0.00/63 0 119.Bf3 4.09/9 3 Kh7 (Kf8) >0.00/63 0 120.Bd5 4.09/8 2 Kg7 0.00/63 0 121.Bh1 4.09/9 4 Kh7 (Kf8) >0.00/63 0 122.Bc6 4.09/9 3 Kg7 0.00/63 0 123.Be4 4.09/9 3 Kg8 (Kf8) >0.00/63 0 124.h5 4.09/9 3 Kg7 (Kf8) 0.00/63 0 125.Kf4 4.09/10 3 Kg8 >(Kf8) 0.00/63 0 126.h6 4.09/9 1 Kh8 0.00/63 0 127.Ke5 4.09/10 1 Kg8 >0.00/4 0 128.Bd3 4.09/10 1 Kh8 0.00/63 0 129.Kf4 4.09/11 3 Kg8 >0.00/4 0 130.Kg5 4.09/11 3 Kh8 0.00/63 0 131.Be4 4.09/10 1 Kg8 >0.00/4 0 132.Bf5 4.09/10 1 Kh8 0.00/63 0 133.Bd3 4.09/10 1 Kg8 >0.00/4 0 134.Be4 4.09/11 3 Kh8 0.00/63 0 135.Bd5 4.09/10 1 Kh7 >0.00/4 0 136.Bc4 4.09/11 1 Kh8 0.00/4 0 137.Be6 4.09/12 3 Kh7 0.00/4 > 0 138.Bd5 4.09/11 1 Kh8 0.00/4 0 139.Bc4 4.09/11 1 Kh7 0.00/4 0 >140.Be6 4.09/12 3 Kh8 0.00/4 0 141.Bf5 4.09/11 1 Kg8 0.00/4 0 >142.Kf4 4.09/11 2 Kh8 0.00/63 0 143.Ke5 4.09/11 3 Kg8 0.00/4 0 >144.Be4 4.09/11 3 Kh8 0.00/63 0 145.Bd3 4.09/11 3 Kg8 0.00/4 0 >146.Bf5 4.09/11 2 Kh8 0.00/63 0 147.Bc2 4.09/11 2 Kg8 0.00/4 0 >148.Bg6 4.09/11 2 Kh8 0.00/63 0 149.Bb1 4.09/11 2 Kg8 0.00/4 0 >150.Bc2 4.09/12 4 Kh8 0.00/63 0 151.Kf6 4.09/11 2 Kg8 0.00/4 0 > 152.Be4 4.09/12 4 Kh8 0.00/63 0 ½–½ > This is a simple special-case heuristic (ie. rook pawn & wrong bishop) which will be added, as EGTBs do not cover it fully. > > > > >(695) Rybka 1.01 Beta 10d 32-bit - Shredder 9.1 UCI [D49] >10_3 tournament Home (139.1), 24.01.2006 >[0.26;0.56] >GenuineIntel 3198 MHzW=18.6 ply; 392kN/s; Fritz9.ctgB=28.7 ply; 667kN/s; >Fritz9.ctg 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 >8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5 12.Nxe5 axb5 13.Bxb5+ Bd7 14.Nxd7 Qa5+ >15.Bd2 Qxb5 16.Nxf8 Kxf8 17.b3 Nd5 18.a4 Qd3 19.Qe2 Qxb3 20.0–0 Qc2 21.Rfc1 d3 >22.Qe1 Qb2 23.a5 Qd4 24.Rab1 h5 0.56/15 1:06 25.Qd1 (Rb7) 0.26/12 42 >25...Qe4 0.61/14 20 26.Rb3 (Qb3) 0.33/12 28 26...Kg8 (h4) 0.61/14 34 >27.Ra1 0.51/12 51 Kh7 (g6) 0.67/15 39 28.Qxh5+ 0.90/12 38 Kg8 0.67/10 >0 29.Qg5 1.09/12 19 Rh6 (Rh4) 1.35/16 1:31 30.Qg3 1.43/12 14 Rg6 >1.55/16 24 31.Re1 1.43/12 5 Qxe1+ 1.47/16 18 32.Bxe1 1.47/2 0 Rxg3 >1.69/21 21 33.hxg3 1.46/17 20 f5 (Kf8) 1.68/19 18 34.Rxd3 1.48/16 13 >Kf7 1.72/19 19 35.f4 (Kf1) 1.59/16 37 35...Ke7 1.60/18 20 36.Rb3 (Ra3) >1.59/16 21 36...Kf6 (g6) 1.63/18 36 37.Kf2 (Rb5) 1.63/15 19 37...e5 (g5) > 1.47/17 15 38.Rb5 (fxe5+) 1.64/16 22 38...Ke6 1.56/18 16 39.fxe5 >1.60/16 22 Kxe5 1.65/18 19 40.Kf3 1.61/15 24 Kd4 (g6) 1.65/17 25 >41.Bf2+ (g4) 1.69/14 17 41...Ke5 1.66/15 2 42.g4 1.67/14 30 g6 (fxg4+) >1.63/16 18 43.gxf5 (Bb6) 1.77/14 10 43...gxf5 1.60/17 5 44.Be3 (Bb6) >1.72/15 11 44...Ra6 (Kd6) 1.62/16 8 45.g3 (Rc5) 1.73/15 10 45...Ra8 >(Rc6) 1.55/18 12 46.Bf2 1.76/15 25 Kd6 (Ra6) 1.56/18 11 47.Be1 (Bb6) >1.76/16 17 47...Ra6 (Kc6) 1.66/18 36 48.Rb8 (Ke2) 1.79/14 9 48...Ke5 >1.69/15 12 49.Re8+ (Bd2) 1.89/13 9 49...Kd4 (Kd6) 1.68/16 3 50.Rf8 >1.88/15 9 Re6 1.68/17 6 51.Bf2+ 1.85/15 9 Ke5 1.69/17 3 52.Ra8 (Rb8) >1.82/15 9 52...Nb4 (Nc7) 1.70/15 7 53.Be1 (Rb8) 2.50/14 8 53...Nc6 (Nd5) > 1.47/16 10 54.a6 (Rf8) 2.51/12 7 54...Kd5 1.43/16 7 55.Ba5 (Bf2) >2.57/12 8 55...Re7 1.43/14 9 56.Bb6 2.46/14 10 Re4 1.43/16 6 57.a7 >2.39/14 6 Ra4 1.86/17 11 58.Be3 2.07/14 10 Ne5+ 2.00/17 8 59.Kg2 >2.09/15 5 Ra2+ (Nc6) 2.06/17 7 60.Bf2 3.27/17 6 Nc6 2.04/19 7 61.Rb8 >(Re8) 3.38/19 9 61...Nxa7 2.07/19 7 62.Ra8 3.46/18 13 Rxf2+ 2.05/20 8 > 63.Kxf2 3.44/20 3 Nc6 > >[D] R7/8/2n5/3k1p2/8/6P1/5K2/8 w - - 0 64 > > This position is winning for white, but white has to know how to win. Here >Rybka has no idea and loses another 1/2 point. The way to win this is to limit >the squares that the Knight will be able to control and try to take an >opportunistic time to pin it to the King and even sacrifice the Rook for it to >Queen the pawn. 1.95/19 5 64.Kf3 3.42/19 13 [64.Ke3 Ke5 65.Re8+ Kf6 66.Kf4 >Nd4 67.Rf8+ Ke6 68.Kg5 Nf3+ 69.Kg6 Ne5+ 70.Kg7 Nc4 71.Rf6+ Ke5 72.Kg6 Ne3 73.Kg5 >Kd5 74.Rxf5+ Nxf5 75.Kxf5 Kd6 76.Kf6 Kd7 77.Kf7 Kd6 78.g4 Kc5 79.g5 Kd5+-] >64...Ke5 2.01/20 5 65.Ke3 (Re8+) 3.42/21 7 65...Ne7 1.93/17 1 66.Re8 >(Ra5+) 3.42/21 8 66...Kf6 1.92/20 6 67.Rd8 (Kd4) 3.42/22 6 67...Kg5 >1.89/20 8 68.Rd7 (Kf3) 3.42/21 6 68...Ng6 1.92/20 4 69.Rg7 3.42/21 4 >Kh5 (Kf6) 1.93/21 6 70.Rg8 (Kf3) 3.42/22 5 70...Ne7 (Kg5) 1.90/21 7 >71.Rf8 (Re8) 3.42/22 7 71...Kg4 (Kg5) 1.92/21 6 72.Rf7 3.42/23 6 Ng6 >1.93/21 3 73.Rb7 (Ra7) 3.42/23 4 73...Kg5 1.93/20 3 74.Ra7 3.42/22 7 >Kg4 (Ne5) 1.90/19 3 75.Ra6 (Ra8) 3.42/23 5 75...Kg5 1.93/19 3 76.Ra8 >(Re6) 3.42/23 5 76...Ne7 (Kf6) 1.93/20 3 77.Rd8 3.42/23 4 Kf6 (Ng6) >1.92/20 5 78.Re8 (Rd7) 3.42/22 6 78...Ng6 (Nc6) 1.93/20 2 79.Rc8 (Ra8) >3.42/22 6 79...Ne7 1.91/19 2 80.Rc5 (Rb8) 3.42/23 28 80...Kg5 1.92/19 >3 81.Kf3 3.42/24 5 Kf6 1.90/20 3 82.Rb5 (Ra5) 3.42/24 3 82...Kg5 (Ng6) > 1.90/20 2 83.Re5 3.42/22 8 Kf6 (Nc6) 1.91/22 3 84.Rc5 (Ra5) 3.42/24 4 > 84...Kg5 (Ng6) 1.92/21 3 85.Ra5 3.42/25 3 Kf6 (Nc6) 1.93/21 3 86.Ke2 >(Ra6+) 3.42/20 3 86...Kg5 (Ng6) 1.91/19 2 87.Kf2 3.39/18 5 Nc6 1.90/20 > 3 88.Rd5 (Ra8) 3.39/18 3 88...Ne7 1.90/21 4 89.Rd4 (Rc5) 3.39/19 3 >89...Nc6 1.90/21 3 90.Ra4 (Rd6) 3.39/19 4 90...Ne5 1.92/21 5 91.Ra8 >3.39/19 3 Nc6 (Ng4+) 1.93/20 6 92.Rg8+ 3.42/22 4 Kf6 1.91/20 1 93.Ke3 >(Rf8+) 3.42/23 5 93...Ne5 (Ke5) 1.90/19 3 94.Rf8+ (Ra8) 3.42/21 2 >94...Kg5 1.89/20 2 95.Rc8 (Rd8) 3.42/23 3 95...Ng6 1.90/20 3 96.Rg8 >(Kf3) 3.42/23 2 96...Kf6 1.91/21 5 97.Ra8 (Rb8) 3.42/21 7 97...Ne5 >(Ne7) 1.90/20 2 98.Rc8 (Rb8) 3.42/21 2 98...Kg6 (Ng6) 1.89/19 3 99.Rc7 >(Re8) 3.42/16 10 99...Kg5 (Kf6) 1.90/19 1 100.Rg7+ 3.39/15 2 Kf6 (Ng6) >1.90/21 2 101.Rh7 (Rb7) 3.39/18 5 101...Kg5 (Nc4+) 1.87/17 2 102.Rh8 >(Ra7) 3.40/17 2 102...Ng6 (Ng4+) 1.84/19 2 103.Rc8 (Rb8) 3.42/19 3 >103...Ne7 (Kf6) 1.85/18 2 104.Ra8 (Rb8) 3.39/16 3 104...Kg4 1.77/18 5 >105.Kf2 3.39/15 4 Ng6 (Nd5) 1.59/16 3 106.Ra4+ (Kg2) 3.39/15 5 >106...Kg5 1.40/16 3 107.Ra5 3.36/15 6 Ne7 (Nf8) 1.44/16 4 108.Ke2 (Re5) > 3.36/13 3 108...Ng8 (Nc6) 1.06/16 2 109.Kf3 (Ra6) 3.34/13 3 109...Nh6 >(Ne7) 1.15/17 2 110.Ra7 (g4) 1.73/15 8 110...Ng4 0.00/19 3 111.Rg7+ >(Ra4) 1.80/16 3 111...Kh5 (Kh6) 0.00/27 1 112.Rxg4 1.85/21 2 fxg4+ >0.00/31 0 113.Kf4 1.97/22 2 Kh6 0.00/26 1 114.Kxg4 (Kf5) 1.97/22 2 >114...Kg6 0.00/31 0 115.Kh4 (Kf3) 1.97/22 2 115...Kh6 0.00/36 1 116.g4 >1.97/23 2 Kg6 0.00/36 4 117.g5 1.97/22 2 Kh7 (Kg7) 0.00/38 2 118.Kh3 >(Kh5) 1.97/21 4 118...Kg7 0.00/40 2 119.Kg3 (g6) 1.97/22 3 119...Kf7 >(Kg8) 0.00/42 2 120.Kf4 (Kg4) 1.97/22 3 120...Ke7 (Ke6) 0.00/36 0 >121.Kf5 (g6) 1.97/21 2 121...Kf7 0.00/44 1 122.Kg4 (Ke5) 1.97/22 2 >122...Kg6 (Kg7) 0.00/48 1 123.Kf4 (Kh3) 1.97/20 1 123...Kh7 (Kf7) 0.00/42 > 0 124.Kg3 (Ke3) 1.97/22 6 124...Kg7 (Kh8) 0.00/47 6 125.Kf3 (Kg4) >0.09/15 3 125...Kf7 0.00/35 0 126.Ke4 (Ke2) 0.09/15 3 126...Ke7 0.00/44 > 0 127.Kf4 (Kd4) 1.97/17 1 127...Ke6 (Ke8) 0.00/44 1 128.Kg4 (g6) >1.97/20 7 128...Kf7 0.00/48 1 129.Kh4 (g6+) 1.97/18 3 129...Kg6 (Kg7) >0.00/62 11 130.Kg4 (Kh3) 0.00/17 2 130...Kh7 (Kf7) 0.00/51 2 131.Kh5 >(Kh4) 1.78/16 3 131...Kg7 0.00/63 3 132.g6 1.78/18 2 Kg8 0.00/97 6 >133.Kh6 (g7) 1.78/16 2 133...Kh8 0.00/97 5 134.Kg5 (g7+) 1.44/16 2 >134...Kg8 0.00/95 5 135.Kh4 (Kf6) 1.55/16 3 135...Kf8 0.00/86 2 136.Kg4 >(Kg3) 0.33/17 12 136...Kg7 (Kg8) 0.00/81 5 137.Kf5 (Kf4) 0.27/15 3 >137...Kg8 0.00/83 1 138.Kf6 0.15/14 2 Kf8 0.00/87 5 139.g7+ 0.03/15 3 > Kg8 0.00/94 5 140.Kf5 (Kg6) 0.00/15 2 140...Kxg7 0.00/93 5 ½–½ > This is a bit more complicated than the no-progress positions from before. This example will soon be done via 6-man EGTB, but add another pawn for each side and some heuristics will be needed. > > > >(872) Fritz 9 - Rybka 1.01 Beta 10d 32-bit [D58] >10_3 tournament Home (227.2), 27.01.2006 >[0.27;–0.04] >GenuineIntel 3198 MHzW=13.2 ply; 1,187kN/s; Fritz9.ctgB=11.9 ply; 83kN/s; >Fritz9.ctg 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 0–0 7.e3 b6 8.Rc1 >Bb7 9.Bxf6 Bxf6 10.cxd5 exd5 11.Bd3 c5 12.0–0 Nd7 13.Bf5 g6 14.Bxd7 cxd4 15.Bc6 >Bxc6 16.Nxd4 Bb7 17.Qg4 0.27/12 52 Rc8 (Bg7) -0.04/12 21 18.Qf4 0.23/12 >29 Bg5 (Bg7) 0.03/12 19 19.Qg3 0.46/13 23 Bh4 (Re8) 0.00/13 19 20.Qh3 >(Qf4) 0.47/13 32 20...Re8 (a6) -0.06/12 38 21.Rfd1 0.34/12 46 h5 (Kg7) >-0.12/12 15 22.Nde2 (Qf3) 0.44/11 21 22...Bf6 -0.26/11 24 23.a3 (Qf3) >0.29/11 23 23...Kg7 (Bg7) -0.34/11 21 24.Nd4 0.22/11 22 Rc4 (a6) >-0.41/13 35 25.b3 (Qg3) 0.04/12 27 25...Rc5 -0.49/13 18 26.b4 -0.11/12 >15 Rc4 -0.46/14 27 27.Ncb5 -0.34/12 21 Rxc1 -0.49/14 23 28.Rxc1 >-0.45/14 21 a6 -0.51/14 15 29.Nc3 -0.39/13 11 a5 (Qc8) -0.65/14 44 >30.bxa5 (Nce2) -0.16/12 20 30...Bxd4 -1.17/15 18 31.exd4 -0.40/13 11 >Qe7 -1.22/15 21 32.Qd3 -0.47/14 13 Qxa3 -1.31/14 9 33.Qd2 -0.63/14 16 > bxa5 -1.38/13 12 34.Rb1 -0.53/13 11 Bc6 -1.49/13 21 35.h3 (g3) >-0.61/13 16 35...a4 -1.60/13 8 36.Kh1 (Rb6) -0.75/13 17 36...Qe7 >-1.81/13 16 37.Kg1 -0.71/12 8 a3 -1.86/13 11 38.Kh1 (Qf4) -0.77/12 9 >38...Qa7 (Ra8) -2.10/12 16 39.Ra1 -1.03/13 24 Rb8 (Qa5) -2.31/12 10 >40.Qf4 -0.83/12 8 Rb3 (Rb2) -2.65/11 8 41.Qe3 -1.54/13 16 Kg8 -3.36/13 > 8 42.Qd2 -2.00/13 9 Qa5 (Qb8) -3.60/14 10 43.Rc1 (Ne4) -2.24/14 16 >43...Bd7 -3.87/13 10 44.Kh2 (Kg1) -2.22/13 12 44...a2 -3.86/13 13 >45.Qxa2 -2.32/14 8 Qc7+ -3.85/13 2 46.Kg1 -2.36/15 10 Rxc3 -3.85/15 5 > 47.Rxc3 -2.52/14 11 Qxc3 -3.85/15 3 48.Qxd5 -2.53/14 12 Qe1+ (Qc1+) >-3.92/15 13 49.Kh2 -2.36/11 0 Be6 -3.95/15 9 50.Qf3 Rybka has completely >outplayed Fritz and should win this easily. The simplest way to win is to >exchange queens and if white tries to avoid that he will lose material or get >mated. -2.45/13 11 > >[D] 6k1/5p2/4b1p1/7p/3P4/5Q1P/5PPK/4q3 b - - 0 50 > > >50...Qd2 (Kg7) -3.95/15 6 51.Qf6 (Qe3) -2.54/14 7 51...Bf5 (g5) -4.13/12 >6 52.Kg3 (Qd8+) -2.30/12 6 52...h4+ (Qd3+) -4.42/11 10 53.Kf3 -2.71/11 >9 Qd3+ -4.71/11 20 54.Kf4 -2.53/11 1 Qe4+ (Qf1) -4.77/12 15 55.Kg5 >-2.08/11 0 Qe2 (Qe1) -4.71/13 14 56.Qd8+ (d5) -2.95/13 4 56...Kh7 >-4.77/11 4 57.Qf8 (Qc7) -3.11/14 13 57...Qd2+ -5.00/8 1 58.Kf6 -3.18/13 > 11 Qxd4+ -4.59/8 1 59.Kxf7 -3.18/13 7 Qd5+ (Be4) -4.78/8 1 60.Kf6 >-2.74/13 5 Qc6+ -4.67/9 3 61.Kg5 -2.79/14 9 Qxg2+ -4.65/10 6 62.Kf6 >-2.77/13 6 Qc6+ -4.61/11 12 63.Kg5 -2.77/13 4 Qc1+ (Qe6) -4.62/11 9 >64.Kf6 -2.77/14 7 Qc3+ (Qb2+) -4.62/11 5 65.Kg5 -2.77/14 3 Qd2+ >-4.63/12 20 66.Kf6 -2.76/14 5 Qd4+ (Qd7) -4.86/12 10 67.Kg5 -2.75/14 5 > Qd7 -4.81/12 9 68.Qh6+ (f3) -2.70/13 5 68...Kg8 -4.62/2 0 69.Kxh4 >-2.76/13 6 Qc7 (Qd1) -4.80/11 4 70.Qe3 -2.82/13 7 Qh7+ -4.94/10 2 >71.Kg5 -2.80/13 9 Qh5+ -4.98/10 1 72.Kf6 -2.79/12 3 Qh4+ -5.01/11 10 >73.Ke5 Rybka has done very well in flushing out the white King and causing >material loss, now is the time to bail out and simplify the position and >exchange Queens.. Qe7+ forcing the exchange leaves a simple bishop pawn win. >-2.82/12 5 > >[D] 6k1/8/6p1/4Kb2/7q/4Q2P/5P2/8 b - - 0 73 > > >73...Bxh3? With an open position and Queens on the boards it makes absolutely no >sense to allow white any chance of a perpetual. -4.99/9 2 Queens should >immediately be exchanged 74.f4 (Qe4) -2.99/11 9 74...Qe7+ -5.19/8 3 75.Kd4 > -3.36/12 4 > >[D] 6k1/4q3/6p1/8/3K1P2/4Q2b/8/8 b - - 0 75 > > Qb4+? Again black does not simplify into an easily won bishop pawn endgame. >-5.15/9 7 for example ...[75...Qxe3+ 76.Kxe3 Kf7 77.Kf2 Bd7 78.Kf3 Kf6 79.Ke3 >Kf5 80.Kf3 Bc6+ 81.Ke3 Be4 82.Kd2 Kxf4+-] 76.Kd5 (Ke5) -2.85/10 5 76...Bg2+ >-5.11/8 5 77.Ke6 -2.84/11 3 Qc4+ (Be4) -5.17/9 5 78.Kf6 -2.84/13 4 >Qf7+ (Be4) -4.74/10 10 79.Kg5 -2.94/13 3 Qf5+ -4.62/10 4 80.Kh4 All >humans in this kind of position would absolutely not allow white to get in a >check simply because it can result in annoying Queen checks. -2.96/14 6 >80...Be4? Seems like Rybka just doesn't want to win this -4.70/10 5 81.Kg3 >(Qc3) -2.75/13 4 81...Bd5 (Qd5) -4.57/10 4 82.Qe8+ -2.72/13 3 Kh7 >-4.44/11 1 83.Qe7+ (Qe5) -2.77/13 3 83...Bf7 (Qf7) -4.22/12 5 84.Qc7 >(Kh4) -2.61/12 3 84...Qd3+ (Kg7) -4.10/10 3 85.Kf2 (Kh4) -2.64/12 3 >85...Kg7 (Qd4+) -4.10/11 5 86.Qe5+ -2.64/12 3 Kf8 -4.10/11 3 87.Qc5+ >(Qh8+) -2.65/12 4 87...Kg8 -4.48/10 2 88.Qe7 (f5) -2.66/12 3 88...Qd2+ >(Qf5) -4.59/9 3 89.Kg3 -2.64/13 4 Qc3+ -4.59/10 3 90.Kf2 (Kh4) >-2.66/12 2 90...Qd4+ (Qc4) -4.58/10 4 91.Kg3 (Qe3) -2.66/13 3 91...Qg1+ >(Kg7) -4.58/11 8 92.Kh3 -2.68/13 3 Qf2 (Qh1+) -4.58/11 3 93.Kg4 (Qd8+) >-2.66/12 6 93...Qg2+ -4.57/10 6 94.Kh4 -2.62/11 0 Qh1+ (Qf3) -4.57/11 >8 95.Kg3 -2.63/13 3 Qc1 (Qd5) -4.52/11 3 96.Qd8+ (Kh4) -2.61/12 6 >96...Kh7 -4.57/10 1 97.Qh4+ (Qe7) -2.65/12 2 97...Kg7 -4.57/11 1 98.Qe7 > -2.62/12 2 Qg1+ (Qc3+) -4.52/10 1 99.Kf3 (Kh3) -2.62/13 2 99...Qd1+ >(Qf1+) -4.49/10 2 100.Kg3 -2.64/13 2 Qc1 (Qb3+) -4.35/11 8 101.Qe5+ >(Kg4) -2.61/12 4 101...Kh7 -4.52/11 2 102.Qe7 (Kf2) -2.62/11 2 >102...Qg1+ (Qc3+) -4.40/11 2 103.Kf3 (Kh3) -2.62/13 2 103...Qd1+ -4.29/12 > 6 104.Kg3 -2.64/13 4 Qd3+ (Kg8) -4.45/12 6 105.Kg2 (Kg4) -2.61/13 5 >105...Kg7 (Qd5+) -4.43/11 3 106.Kf2 (Qe5+) -2.65/12 3 106...Kg8 (Qd4+) >-4.43/11 5 107.Qf6 (Qe5) -2.71/12 4 107...Qd2+ (Qf5) -4.64/10 3 108.Kg3 >-2.68/12 3 Qe1+ -4.64/10 2 109.Kg4 -2.75/12 7 Qg1+ -4.64/10 3 110.Kh3 >(Kh4) -2.68/12 2 110...Qe3+ -4.58/10 2 111.Kh4 -2.64/12 2 Qf2+ (Qe6) >-4.55/11 8 112.Kh3 -2.64/12 2 Qf3+ -4.56/11 8 113.Kh4 -2.61/12 2 Qh5+ >(Qh1+) -4.55/11 4 114.Kg3 -2.57/11 0 Qc5 (Qf5) -4.54/12 8 115.Kg4 (Kh4) > -2.63/12 3 115...Qd5 -4.55/10 3 116.Kg3 (f5) -2.63/12 3 116...Qb3+ >(Qe6) -4.53/10 2 117.Kf2 -2.37/12 4 Qa2+ (Qe6) -4.49/11 6 118.Kg3 >-1.09/12 6 Qa3+ -4.50/11 2 119.Kf2 (Kg4) -0.41/10 6 119...Qa4 -4.45/9 >3 120.Qd8+ (Qe5) 0.00/13 3 120...Kh7 (Qe8) -4.10/10 3 121.Qh4+ (Qc7) >0.00/14 2 121...Kg7 0.00/13 1 122.Qg5 0.00/15 2 Be6 (Qe4) 0.00/13 1 >123.Qe7+ (Qe5+) 0.00/15 3 123...Bf7 0.00/15 2 124.Kg3 Hard to believe that >Rybka could only manage a draw in this position. Another lost 1/2 point. >0.00/16 2 ½–½ Beta 14 should play this position properly, but understanding the deep perpetuals is probably not possible for the short-term. Vas
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