chessGMSmothered mate, part 2 is lesson 4 of 9 in Mating patterns I, a checkmate course suited to players rated around 700 (beginners). The king is boxed in by its own pieces, and a single knight check is mate. Often a queen sacrifice forces the last blocker into place. More positions, a little harder. It has 7 interactive exercises: 7 calculated lines from real positions. You play every move on a board and get feedback straight away. The lesson is free.