Mate in three or more is lesson 7 of 9 in Real-game tactics 10: Grandmaster calculation, a tactics course suited to players rated around 2400 (advanced players). Longer mating combinations: keep checking, keep the king boxed in, and count every reply. 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.
White to move: mate in 4.
White to move: mate in 5.
Black to move: mate in 5. (2 positions)
Black to move: mate in 4.
Worked examples
White to move: mate in 3. 1.Kf2 Rb6 2.Rh1+ Rh6 3.Rxh6#. The quiet Kf2 left the opponent without a good answer. Mate in 3.
White to move: mate in 4. 1.Qxf8+ Kxf8 2.Rc8+ Qe8 3.Bc5+ Kg8 4.Rxe8#. The king was trapped on the back rank behind its own pawns. Mate in 4.
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