Sacrifices that win is lesson 4 of 9 in Real-game tactics 10: Grandmaster calculation, a tactics course suited to players rated around 2400 (advanced players). Giving material is fine when you get more back. Calculate the line to the end before you let the piece go. 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: sacrifice to win. (3 positions)
Black to move: sacrifice to win. (3 positions)
White to move: mate in 5.
Worked examples
White to move: sacrifice to win. 1.Rd2 Qe7 2.Bf6 Qxf6 3.Qxf6+. The bishop sacrifice on f6 dragged the queen away from its duty. You come out 6 points ahead in material.
White to move: sacrifice to win. 1.Rb7 Rd7 2.Qxd7 Qxd7 3.Rxd7. The queen sacrifice on d7 dragged the queen away from its duty. You come out 5 points ahead in material.
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