In last week’s puzzle, with Black to move, I asked you to choose between Rb8 and Bxf2. IM Tom Rendle made the wrong choice: 21… Bxf2 lost a piece to 22. e5+ Kxe5 23. Nd3+.

Most games are decided by tactical points like this rather than brilliant sacrifices. Questions of this type will feature in my forthcoming book Chess Puzzles for Heroes, which should be available towards the end of this year.