Sacrifices that win is lesson 7 of 8 in Real-game tactics 3: Discovered attacks, deflection and decoys, a tactics course suited to players rated around 1000 (improving 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
Black to move: mate in 2.
Black to move: sacrifice to win. (3 positions)
White to move: sacrifice to win. (3 positions)
Worked examples
Black to move: mate in 2. 1...Nc3+ 2.bxc3 Qb1#. The king was trapped on the back rank behind its own pawns. Mate in 2.
Black to move: sacrifice to win. 1...Bxg3+. The sacrifice paid off. The position is winning.
More in Real-game tactics 3: Discovered attacks, deflection and decoys
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