Knight forks is lesson 1 of 8 in Forks, a tactics course suited to players rated around 1300 (improving players). The knight jumps, so its double attacks cannot be blocked. Look for a square where it hits two pieces, or the king and a piece. 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: win material with a knight fork. (2 positions)
Black to move: win material with a knight fork. (5 positions)
Worked examples
White to move: win material with a knight fork. 1.Nf5+ Ke8 2.Nxd6+. The knight on f5 attacked the king and the queen at once. You come out 6 points ahead in material.
Black to move: win material with a knight fork. 1...Nd3+ 2.Ke2 Nxb2. The knight on d3 attacked the king and the queen at once. You win the queen on b2 and come out 9 points ahead.
chessGM