I challenged a group of students to find a position with two queens against a lone king that took me more than three moves to deliver checkmate. After several failed efforts, they came up with the key idea: place White's king where it interferes with the mobility of both queens. I could not find checkmate in less than four moves. Checking with an engine verifies that it is indeed checkmate in four.
White to move
Does a position exist where more than four moves are needed?
Scholastic players and parents: The label "Problem of the Week" links to posts that contain my "lesson of the week." These blog posts serve to reinforce what is presented in my after school and in-school chess clubs.
I am available for one-on-one lessons in person or online. Use the contact form below if interested.