The solution to last Monday’s problem is that White wins with 1. d3! a2 2. c4+ Kc5 3. Kb7 a1=Q 4. Be7 mate.
Of course, Black can avoid checkmate, but in all other lines he cannot promote his pawn.
This week’s position comes from a new training technique I have been experimenting with.
I have a large collection of mate in 3 or 4 moves on the computer. I select one and look at the position for a maximum of 3 seconds.
I then try to solve them blindfold. I don’t always succeed.
Can you find the mate in 4 for Black that I missed?