Calculation: three moves deep is lesson 5 of 9 in Real-game tactics 9: Master calculation, a tactics course suited to players rated around 2200 (advanced players). Combinations of three moves or more. See the whole line, with the opponent's best replies, before you play. 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.
What you practise
White to move and win. (2 positions)
Black to move and win. (5 positions)
Worked examples
White to move and win. 1.Rd8+ Nf8 2.Rxf8+ Kxf8 3.Qh8+ Ke7 4.Qe8+ Kd6 5.Ne4+. The rook sacrifice lured the king to f8. The position is winning.
Black to move and win. 1...exf2+ 2.Ke2 fxg1=N+ 3.Ke1 Qh4+ 4.Kd2 Nc6 5.Bc3 Bg4. The pawn on f2 attacked the king and the knight at once. You win the knight on g1 and come out 6 points ahead.
chessGM