What is a fork?
A fork is a single move that attacks two or more enemy pieces at once. Because a player only gets one move to respond, at least one of the targets falls. The knight is the classic forking piece — it jumps over everything and attacks squares no other piece covers — but pawns, queens, rooks and bishops all fork, and a pawn fork is often the most brutal of the lot because the pawn is worth so much less than what it attacks.
How to spot it
- Look for enemy pieces that sit on the same colour square a knight could reach, or on the same rank, file or diagonal for a line piece.
- The king counts as a target: a check that also hits a rook is a fork, and the check must be answered first.
- Undefended pieces make forks work. Before calculating, note which enemy pieces have no defender at all.
The mistake to avoid
Players find the fork but play it one move too early, allowing a defensive move in between. Check whether your forking square is guarded before you jump into it.
Train the ones you actually miss
Solving a motif in isolation is useful, but the tactics that cost you rating are the ones you walked past in your own games. Run a free game review and Chesslume turns your own mistakes into puzzles, so you train the pattern you personally keep missing rather than a random one.
Other tactical motifs
- Pin puzzles — A pinned piece is on the board but not in the game.
- Skewer puzzles — A pin backwards: the big piece is in front, and it has to move.
- Discovered attack puzzles — The piece that moves is not the piece that does the damage.
- Hanging piece puzzles — The most common way games are decided is the simplest one.
- Deflection puzzles — The defender is doing a job. Give it a better offer.
- Back-rank mate puzzles — The pawns that shelter the king are also the walls of its cell.
- Mate in 2 puzzles — Two moves, no escape, every defence covered.