Mate in three, part 2 is lesson 9 of 9 in Mating patterns II, a checkmate course suited to players rated around 1100 (improving players). Three-move mates: keep checking, keep the king boxed in, and count every reply. More positions, a little harder. It has 6 interactive exercises: 6 calculated lines from real positions. You play every move on a board and get feedback straight away. The lesson is free.
What you practise
White to move: mate in 3. (2 positions)
Black to move: mate in 3. (4 positions)
Worked examples
White to move: mate in 3. 1.Rd6+ Kc4 2.Re5 Bxe7 3.Rd4#. Every move was forcing: the king never had time to escape. Mate in 3.
Black to move: mate in 3. 1...Nf3+ 2.Kg3 Rb1 3.Rxf7 Rg1#. Every move was forcing: the king never had time to escape. Mate in 3.
chessGM