12/28/2025 – These days it is not easy to challenge anyone with problems or studies. Loading the PGN and clicking Start will usually get you the solution in seconds. So we are trying to provide you with "computer resistant" puzzles in this year's Christmas Puzzle Week. Today the subject is taking back a move in a given position and looking for a move to fulfil the condition. As in this 100-year-old problem by Thomas Dawson: it requires you to take back one move and then mate the opponent in two. Can you think how?

12/26/2025 – Take a look at this position, in which White should mate in two. Looks very easy, and hundreds of readers of the newspaper in which it appeared submitted a solution. But it was not correct. In our Christmas Puzzle week the consummate expert of unusual chess problems, Werner Keym, asks you to look carefully at the position and find a genuine way for White to mate Black in two moves. There are two other problems to solve.