BARDEN’S CHESS PROBLEMS

Magnus Carlsen v Vishy Anand, Zurich blitz 2014.

The game opened 1 Nf3 d5 2 b3 c5 3 e4?! dxe4 4 Ng5 and Carlsen reached the fine attacking position in the diagram. Now, surprisingly, Carlsen chose c2-c3. Can you spot the immediate win the world champion missed? (Answer on page 60.)