Black just played 58...b5. Is this a chess position white can win or is it a draw?
2018 American Continental Chess - Round 6
I have studied the defense of the 4 front and side distances, so it is possible to know what to do to win
1.Kb4 bxc4 2.bxc4 Rh5 3.c5 Rh8 4.Kb5 Rb8+ 5.Ka6 Rc8 6.Kb6 Rb8+ 7.Kc7 Rb4 8.c6 Rc4 9.Rd6+ Ke7 10.Rd1 Rc3 11.Re1+ Kf7 12.Rb1 Ke6 13.Kb7 Kd6 14.Rd1+ Ke6 15.c7 Rb3+ 16.Kc8 Ke7 17.Rd7+ Ke8 18.Rd4 Ke7 19.Re4+ Kf6 20.Kd7 Rd3+ 21.Kc6 Ra3 22.c8=Q Rc3+ 23.Kd7 Rxc8 24.Kxc8
I would also look at 1.Kb4 bc4 2.bc4 Rh5 with the intention of Rh8 and Rb8+. How does white deal with this, and how does it compare to the earlier problem?
I managed to win on the third try.
1.Kb4 bxc4 2.bxc4 Re1 3.c5 Rb1+ 4.Ka5 Ra1+ 5.Kb6 Rb1+ 6.Kc7 Ke5 7.c6 Ke6 8.Kc8 Rb3 9.Rd7 Ra3 10.Rb7 Ra1 11.c7 Rc1 12.Kb8 Kd5 13.c8=Q Rxc8+ 14.Kxc8
This position from that game should be won, but white can't play what Grabinsky played which is 59.cxb5. 59.Kb4 will allow white to hold the black king off the c-file for the time to get his king up the board and in front of the pawn so that black can't harass from the 8th rank the way he could in the position that arose later in the game.