g15713: White to move. Last: 47...Rxh4
 click for larger viewUsing a quote from Y. Averbakh and N. Kopayev when they analyzed a similar position:
'Keres vs Alekhine, 1938 <"Which side is stronger here? Let us examine the position more carefully. White's pawns are one rank further forward than Black's and in addition it is his turn to move. This tells us that the stronger side is White, but are these advantages sufficient for a win?"> I use FinalGen a lot to help analyze many Rook endgames, unfortunately FinalGen cannot always give a definite result... Limitation of FinalGen - as long as there is no more than one piece per side (not counting the kings). <"Not all positions can be solved by FinalGen. Sometimes, White or Black can force the promotion of a pawn, transposing into a different endgame that FinalGen cannot solve. In that case, the text Unsolved will be displayed. These unsolvable positions represent about 5% of all positions that can be generated."> 'http://finalgenchess.ovh/home_ing.php FinalGen has the following:
48.Rd6 or Rc6 or a5 or b4 - White wins or Draw
48.Ra8 or Ra7 - Unsolved
48.Ra5 or Rb6 or Kb2 or Ka2 - Black wins or Draw Stockfish has the following:
White to move
Note: Shredder says in line 1 after 59.Qh8+ White wins in 61 moves 1) +1.63 (40 ply) 48.Rd6 Rh1 49.b4 f5 50.b5 f4 51.b6 Rb1 52.a5 g5 53.Rd7+ Kg6 54.b7 f3 55.Rd6+ Kh5 56.Rb6 Rxb6 57.axb6 f2 58.b8=Q f1=Q 59.Qh8+ Kg4 60.Qc8+ Kh4 61.b7 Qa1+ 62.Kb4 Qb2+ 63.Kc4 Qe2+ 64.Kd5 Qd3+ 65.Kc5 Qa3+ 66.Kc6 Qa4+ 67.Kd5 Qb5+ 68.Ke6 Qb3+ 69.Ke7 Qb4+ 70.Ke8 Qe4+ 71.Kf8 Qb4+ 72.Kf7 Qb3+ 73.Ke8 Qb5+ 74.Kd8 Qd5+ 75.Ke7 Qe5+ 76.Qe6 Qc7+ 77.Qd7 Qe5+ 78.Kf7 Qf4+ 79.Ke6 Qe3+ 80.Kd5 Qb3+ 81.Kd6 Qa3+ 82.Kc7 Qa5+ 83.Kc8 Qc3+ 84.Kb8 Qe5+ 85.Qc7 Qh8+ 86.Ka7 Qa1+ 87.Kb6 Qb2+ 88.Kc6 Qc3+ 89.Kd6 Qf6+ 90.Kd5 Qf5+ 91.Kd4 Qf6+ 92.Kd3 Qf3+ 93.Kc2 2) +0.19 (39 ply) 48.b4 Rh3+ 49.Kb2 Rh2+ 50.Kc3 Rh3+ 51.Kc4 Rh4+ 52.Kc5 Rh5+ 53.Kd6 g5 54.b5 g4 55.Rc6 Rh6+ 56.Kd5 Rxc6 57.bxc6 g3 58.c7 g2 59.c8=Q g1=Q 60.Qc3+ f6 61.a5 Qa7 62.Qc5 Qa8+ 63.Kd4 Kg6 64.Qb6 Qh1 65.Kc5 Qc1+ 66.Kd5 Qd2+ 67.Kc6 Qc2+ 68.Qc5 Qd3 69.Qb5 Qe4+ 70.Qd5 Qe2 71.Kb6 Qe3+ 72.Kb5 Qe2+ 73.Kc5 Qe3+ 74.Qd4 Qe7+ 75.Kc4 Qe6+ 76.Kc3 Qe1+ 77.Qd2 Qe5+ 78.Kc2 Qe6 79.Qd3+ f5 80.a6 Qa2+ 81.Kc3 3) =0.00 (39 ply) 48.a5 Rh1 49.Kb2 g5 50.Rd6 g4 51.a6 g3 52.Rd3 Rh6 53.Rxg3+ Kf8 54.a7 Ra6 55.b4 Rxa7 56.Kb3 Ke7 57.Kc4 Rc7+ 58.Kb5 f5 59.Rf3 Ke6 60.Ka6 Rc1 61.b5 Rb1 62.Rf2 Ke5 63.Re2+ Kd4 64.b6 f4 65.b7 f3 66.Rf2 Ke4 67.Rxf3 60.0 minute analysis by Stockfish 9 v010218 |