Perpetual check is lesson 2 of 8 in Defensive moves, a tactics course suited to players rated around 1400 (club players). When you are losing, checks that never end save the game: a draw by perpetual check. 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: hold the draw. (3 positions)
White to move: hold the draw. (4 positions)
Worked examples
Black to move: hold the draw. 1...Qe1+ 2.Kh2 Qh4+. The checks never stop: the game is drawn by perpetual check. The game is saved. After Ke7 the position would be lost.
White to move: hold the draw. 1.Qc6+ Ke7 2.Qe6+. The checks never stop: the game is drawn by perpetual check. The game is saved. After a6 the position would be lost.