The inaugural FIDE World Solving Championships for Youth (Florianópolis, November 4) and Cadets (Montesilvano, November 21) are set to take place next month. To test your skills we last week gave you six mate in two problems, with the diagrams defending the black side. You had to find the one solution that forced a mate in the second move. For a full discussion of the solutions, here is my YouTube broadcast "WFCC Solving Sessions #2 - Mate in twos!" This time there is an engine (fan) button below the board that will allow you to immediately see the solution, and analyse to analyse all alternate lines.