Discovered attacks is lesson 1 of 2 in Quick practice: discovered attacks and mates, a tactics course suited to players rated around 1400 (club players). Move one piece out of the way and the piece behind it attacks. Two threats in one move. It has 1 interactive exercise: 1 find-the-move puzzle. You play every move on a board and get feedback straight away. The lesson is free.
What this lesson explains
The knight on e5 stands between your rook and the black king. Wherever it jumps, the rook gives check. Black must deal with the check, so the knight's own threat comes for free.
What you practise
Win the queen with a discovered check.
Worked examples
Win the queen with a discovered check. Discovered check: the rook checked, the knight took the queen.
More in Quick practice: discovered attacks and mates