White has given two pieces to expose the enemy king and secure perpetual check. In the diagram position Black's 21...Kh5 wins against both 22.Bd1+ and 22.Qh3+. After 22.Qg7, however, ...
A)... the tables are turned in White's favour;
B)... Black wins anyway;
C)... nothing has changed - drawn!
Posted: Fri 25 Nov 2011