Black has now a passed Pawn, and his Bishop exerts great pressure. White cannot very well play now 37 R × P because of R × R; 38 R × R, B × P; and White could not take the Bishop because Q - K 5 ch would win the Rook, leaving Black a clear passed Pawn ahead.
37. P - Q R 3
Q - R 5 !
38. R × P
R - Q Kt 1
39. R (Q 1) - Q 2
P - B 5
40. Q - Kt 3
R - Kt 6
41. Q - Q 6
41. ........
P - B 6
B × P would also win, which shows that White's game is altogether gone. In these cases, however, it is not the prettiest move that should be played, but the most effective one, the move that will make your opponent resign soonest.
42. R - Q B 2
P × P
43. R - Q 3
Q - K 5 !
44. R - Q 1
R - Q B 6
Resigns.
Of course White must play Q - Q 2, and Black then plays R × P.