Chess Puzzle of the Week (71)

This week I’m celebrating the life of David Bronstein, that most creative and imaginative of grandmasters, who was born 96 years ago yesterday: 19 February 1924.

Bronstein was one of a group of Soviet players, who, in the years immediately following the Second World War, transformed the King’s Indian Defence from something rather passive in which Black was quite likely to get squashed into a dynamic fighting defence. This week’s puzzle is taken from one of his early KID games.

puzzle71

Take a look at this position, from Zita-Bronstein, played in a match between Prague and Moscow in 1946.

Black to play: how did our hero gain a decisive advantage?