BARDEN CHESS

Robert Huebner v Garry Kasparov, Cologne television match 1992. The two-game minimatch was between the then world champion and Germany’s No 1 grandmaster. It began promisingly for the home viewers as Huebner drew with the unfavourable black pieces, then homed in against the Russian king in the return.

Kasparov (Black, to move) is threatened with instant checkmate by Qxh7. He has only three possible defences (a) g6 (b) f5 and (c) Nf6. As the expert match commentator, you have to predict the world champion’s next turn for viewers and explain why it is the best choice. What do you suggest?