A graded practice set of five mating patterns you will meet again and again. The back rank, the supported queen and the smothered king. Two mates with a rook and a knight. First in one move, then in two. This is a checkmate course with 2 lessons and 8 interactive exercises, suited to players rated around 700 (beginners). Every exercise is played on a real board with feedback after each move, there is nothing to install, and it is free.