Discovered checks, part 2 is lesson 6 of 6 in Discovered attacks, a tactics course suited to players rated around 1100 (improving players). A discovered check is the strongest form: the king has to deal with the check, so the piece that moved is free to do anything, even take the queen. More positions, a little harder. It has 10 interactive exercises: 10 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: mate in 4.
Black to move: unleash a discovered check.
White to move: unleash a discovered check. (4 positions)
Black to move: mate in 4. (2 positions)
Black to move: mate in 5.
White to move: mate in 5.
Worked examples
White to move: mate in 4. 1.Bd5+ Kg7 2.Bh6+ Kh8 3.Rb8+ Rc8 4.Rxc8#. Moving the bishop uncovered a check from the rook on b6, so the bishop had a free move. Mate in 4.
Black to move: unleash a discovered check. 1...Rf2+ 2.Kg1 Rd2+ 3.Kf1 Rxd1. Moving the rook uncovered a check from the bishop on a7, so the rook had a free move. You win the rook on d1 and come out 5 points ahead.
chessGM