Calculation: three moves deep is lesson 3 of 7 in Real-game tactics 5: Attacking the king, a tactics course suited to players rated around 1400 (club players). Combinations of three moves or more. See the whole line, with the opponent's best replies, before you play. 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
Black to move and win. (5 positions)
White to move and win.
Worked examples
Black to move and win. 1...Rxc1+ 2.Qxc1 b2 3.Qd1 Qxf4. Every move in the line was forcing. The position is winning.
Black to move and win. 1...Qd3+ 2.Kg1 f2+ 3.Nxf2 Qxg3+. Every move in the line was forcing. The position is winning.
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