I left you a Mate in 4 (Fritz Emil Giegold 3rd Prize Schach-Echo 5 May 1959) to solve on Monday.

Here’s the solution: click on any move to play it through.

Giegold composed a lot of solver-friendly problems: Leonard Barden often uses them in his newspaper columns. If you see his name, the first thing you do is look for the stupidest move on the board!

This problem is a very clear illustration of the Bristol Theme. A line piece makes a move crossing a critical square which is now available for the piece behind it. Here, the rook moves to h1, clearing the way for the queen to reach g1.

Congratulations to Saner, who was the first to provide the solution in our WhatsApp group.