analysis01

This is an amazing endgame position.  See diagram.  Sargon V could not find the one and only move move to hold the draw, (65... Rc3!), to allow access to the g&h files.  Feel free to add comments.  (May require login.)

(11) WChess 1.05 (2400) - Sargon V (2400) [B13]
1809DOS I7-2600K (2.4), 08.09.2018

1.e4 B/0 0 c6 B/0 0 2.d4 B/0 0 d5 B/0 0 3.exd5 B/0 0 cxd5 B/0 0 4.Nf3 B/0 0 Nc6 B/0 0 5.c3 B/0 0 Bg4 B/0 0 6.Be2 B/0 0 Qc7 B/0 0 7.h3 0.46/12 Bxf3 8.Bxf3 0.50/12 e6 9.Nd2 0.15/11 Bd6 10.Nb3 -0.03/12 Nge7 11.Be2 0.07/12 0-0 12.Bg5 0.19/12 a5 13.a4 0.00/12 h6 14.Bd2 -0.11/11 Ng6 15.Nc1 0.07/11 Nf4 16.Bxf4 0.07/12 Bxf4 17.Nd3 0.03/12 Bd6 18.Rb1 -0.03/12 Ne7 19.Bh5 -0.11/12 Rac8 20.Rc1 -0.07/12 g6 21.Bg4 0.03/12 Kg7 22.Bf3 0.00/12 f6 23.Bg4 -0.07/12 Qd7 24.h4 0.03/12 h5 25.Bh3 -0.34/12 Nc6 26.f4 -0.07/12 Rfe8 27.Ra1 -0.15/11 Nd8 28.g3 -0.19/11 Nf7 29.Qb3 0.11/11 Qc6 30.Qb5 -0.07/12 Qc7 31.Nf2 -0.07/11 Bf8 32.Qe2 -0.23/12 Nd6 33.Nd3 -0.30/11 Ne4 34.Qe3 -0.42/11 Qb6 35.g4 -0.92/11 e5 36.fxe5 -1.15/11 fxe5 37.gxh5 -2.26/11 exd4 2.26/9 38.Qxd4+ -2.46/12 Qxd4 39.cxd4 -2.46/13 Ng3+ 40.Kf2 -2.57/13 Nxh1+ 41.Rxh1 -2.23/13 Rc2+ 42.Kf3 -1.30/13 Rd2 43.Nf4 -1.15/13 Bd6 44.Rg1 -1.38/12 Bxf4 45.Rxg6+ -1.42/13 Kf7 46.Kxf4 -1.26/13 Rxd4+ 47.Kg5 -1.38/13 Re3 48.Bd7 -1.53/13 Rb3 49.Be6+ -0.92/13 Ke7 50.Bg4 -0.69/13 Rbb4 0.95/11 51.Re6+ -0.57/13 Kd8 52.Bf3 -0.61/13 Rf4 53.Re3 -0.73/13 Rxh4 54.Re5 -0.38/13 Rh3 55.Rxd5+ -0.34/13 Ke7 56.Re5+ -0.80/13 Kd6 57.Rd5+ -0.88/13 Ke6 58.Bg4+ 0.00/16 Kxd5 59.Bxh3 0.00/16 Rxb2 60.h6 0.00/16 Rh2 61.Bg4 0.00/16 Ke5 62.Kg6 0.00/17 Kf4 63.Bc8 0.00/17 Rg2+ 64.Kf6 0.00/18 Rc2 65.Bxb7 Diagram
0.00/19 65...Rd2 [Stockfish 8 64 POPCNT: 1) 65...Rc3 66.Bg2 Rc5 67.h7 Rf5+ 68.Kg7 Rg5+ 69.Kf6 Rh5 70.Kg7 Rg5+ 0.00/14 ; Stockfish 8 64 POPCNT: 2) 65...Rd2 66.h7 Rd6+ 67.Kg7 Rd7+ 68.Kg6 Rd6+ 69.Kh5 Rd8 70.Bc6 Kf5 71.Bb5 Rb8 72.Bd3+ Ke6 73.Kh6 Kd5 74.Bg6 Kc6 75.Bf7 Kc5 76.Kg6 Rh8 77.Kg7 Rxh7+ 78.Kxh7 Kb4 79.Be8 Kc4 80.Kg7 Kd4 81.Kh8 Kc3 82.Bc6 Kb4 83.Kg7 Kc5 84.Bb5 Kd5 85.Ba6 Kc5 86.Bc8 Kb4 87.Bd7 Kc5 88.Kf6 Kd5 89.Bc8 Kc6 90.Ke5 6.31/33 ] 66.h7 1.69/18 Rd6+ 67.Kg7 2.00/18 Rd7+ -0.19/12 68.Kg6 2.03/18 Rd6+ 69.Kh5 2.19/17 Rd8 70.Bc6 2.30/17 Kf5 -3.92/13 71.Bb5 2.42/17 Rb8 -4.00/12 72.Bd3+ 2.38/15 Ke6 73.Kh6 2.50/16 Kd5 74.Bg6 2.53/16 Kd4 75.Kg7 3.00/17 Rd8 76.h8Q 3.46/19 Rxh8 77.Kxh8 5.23/25 Kc4 78.Kg7 8.84/27 Kb4 -5.63/17 79.Be8 12.84/26 Kc5 80.Kf8 13.11/26 Kd6 -8.64/18 81.Bb5 13.19/26 Kd5 -9.52/17 82.Ke8 13.30/26 Ke6 83.Kd8 13.38/25 Kd6 84.Bd7 13.50/24 Ke5 85.Kc8 13.50/25 Kd6 86.Bb5 13.57/24 Ke6 87.Kc7 13.57/23 Ke5 88.Kb6 #196/22 Kd5 89.Kxa5 #149/21 Kc5 90.Be2 #82/19 Kc6 91.Kb4 #71/18 Kd6 92.Bc4 #39/16 Kc6 93.Bb5+ #23/16 Kd6 94.a5 #31/15 Kc7 95.Kc5 #12/12 Kb7 -99.80/13 96.a6+ #11/10 Kc7 97.Bc4 #11/11 Kd8 98.Kd6 #11/10 Kc8 99.Bb5 #6/9 Kd8 100.a7 #2/1 Kc8 101.a8Q# #1/0 1-0
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