Fork

A fork is a tactic where one piece attacks two or more enemy pieces in a single move. One move rarely answers both threats, so a fork usually wins material. It is not automatic, though: a counter-check, a defender, or a bigger threat can save both. It is consistently among the highest-frequency motifs in tactical play.

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Key piece

How often does it show up

Out of the 212,300 puzzles in this site's database, 17,829 (8.4%) carry the fork tag - the most of any non-mate motif we track. Only the mate tags run higher (mate 57,285, mate in 2 25,089, mate in 1 23,166). The difficulty spread is fairly even, too: 24% sit below rating 1200 and 25% above 1900, so forks appear from beginner puzzles all the way up. (Full counts are in our 212,300-puzzle breakdown.)

Definition

One piece attacks two or more enemy pieces simultaneously. Every piece can fork, but frequencies and characteristics differ.

Sources differ on how "fork" relates to "double attack" (see the FAQ).

Recognition Cues

• Look for common attack squares hitting two enemy pieces.
• If your knight can reach a square from which it attacks two enemy pieces, moving there is a fork.
• When the enemy king and queen sit close together, look for a royal fork.

The Royal Fork

When the fork hits the king and queen, it is called a royal fork. The opponent must spend the move answering the check, so the queen can be taken next. If the forking piece can be captured, though, that capture also answers the check, so winning material is not automatic.

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Key piece

Knight royal-fork signatures (White's perspective):

• Nf6+ - Black king e8 + Black queen d7
• Nd6+ - Black king e8 + Black queen f7

In opening or early middlegame positions, when the king has not castled and the queen is nearby, scan all eight knight jump squares each move.

Example: Pawn Fork - Two Knights Defense Fork Trick

Captured: pawn♟

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Captured: knight♞+2

5... d5(10/10)

Pick a move, or step through with the arrow keys.

Moves

1.e4e5

2.Nf3Nc6

3.Bc4Nf6

4.Nc3Nxe4

5.Nxe4d5

Move 5...d5 is the pawn fork - Black's d-pawn attacks both the c4 bishop and the e4 knight in a single move. Black sacrificed a knight on move 4 with 4...Nxe4 specifically to set this up; 5...d5 recovers the material.

White's options:

• 6.Bd3 (saving the bishop) → 6...dxe4, Black captures the knight. Each side has lost a knight, and Black keeps the e4 pawn it took on move 4.
• 6.Bxd5 (bishop takes pawn) → 6...Qxd5; Black takes the bishop to recover the material sacrificed with the knight.

Here the queen protects the d5 pawn, so Black can answer 6.Bxd5 with 6...Qxd5. Whether a pawn fork wins material depends on the pawn's defenders and the opponent's checks and counterplay.

Practice: Real Puzzles

Every board below is an actual problem from this site's puzzle database - one per forking piece, easiest first. Each board starts after the opponent's setup move. Find the move yourself, then step through with ►. Use ◀ to see the setup move.

1. Knight: with check, there is no defense (White to move, rating 798)

No capturesMaterial equal

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No capturesMaterial equal

41... c4(1/4)

Black pushes c4, and the e5 knight jumps in with Nd7+, checking the b8 king and attacking the f8 bishop from the same square. Because it is check, Black has no time to save the bishop: after Kc8, Nxf8 removes it. Nothing in Black's camp can capture the knight on d7, so the bishop is lost. In other positions, first check whether the forking piece can be taken.

2. Bishop: the counter-fork in a capture race (White to move, rating 1100)

Captured: knight♞+4

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25... Rxe2(1/6)

Pick a move, or step through with the arrow keys.

Moves

25.Rxe2

26.Bxf7+Kh8

27.Bxe8Rxe1

28.Rxe1

Black grabs a knight with Rxe2. Instead of recapturing, White plays Bxf7+, taking a pawn with check; from f7 the bishop also hits the e8 rook and the g6 knight. Black must answer the check first, so after Kh8, Bxe8 collects the rook, and once the captures settle, White is ahead. Even in the middle of a capture race, a fork with check jumps the queue.

3. Pawn: answering a fork with a pawn fork (Black to move, rating 1497)

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No captures+2

39. Nc5+(1/6)

Pick a move, or step through with the arrow keys.

Moves

39.Nc5+Bxc5

40.Rxc5b6+

41.Ka6bxc5

White forks first with Nc5+. Black takes with Bxc5, White recaptures with Rxc5, and the exchanges seem over. Then Black plays b6+. A one-square pawn move checks the king on a5 and attacks the rook that just arrived on c5. The king must step away, and bxc5 removes the rook. The forked side counter-forked with a pawn, and the cheapest piece on the board won a rook.

4. Queen: two directions at once (Black to move, rating 1901)

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Captured: pawn♟+1

19. Bxh6(1/4)

The moment White's bishop grabs a pawn with Bxh6, Black's queen swings out with Qb6+ - checking the g1 king down the a7-g1 diagonal while eyeing the h6 bishop along the sixth rank from the very same square. Only a queen can combine a diagonal and a rank like this. After Kh1, Qxh6 wins the bishop, and White got only a pawn for it. Right after a capture, the capturing piece often stands on a square nobody defends, which is a common moment for queen forks.

Defense

When a fork is threatened:

1. Check whether your piece controls the fork square.
2. Move one of the targeted pieces off the line or out of knight range.
3. Capture or chase the forking piece.

If your king is uncastled on e8/e1 with the queen nearby, scan all eight squares the enemy knight could jump to each move.

Checklist

• Are two enemy pieces unprotected and close together or aligned?
• Is there a common attack square that hits both?
• Can one of my pieces (especially a knight) reach that square in one move?
• Are both the enemy king and queen targets? (That is a royal fork.)

Related Tactics

• Pin - line-alignment tactic. Pin + fork combinations are common.
• Skewer - the pin reversed: the more valuable piece stands in front.
• Discovered Attack - a piece steps off a line and uncovers an attack by the piece behind it. If the moving piece attacks too, two pieces hit at once.

FAQ

Q. Are fork and double attack the same? It depends on the source. One common classification treats the fork as a type of double attack: a fork is one piece attacking two or more targets at once, while double attack also covers cases where two different pieces each create a threat (a discovered attack, for instance). In casual usage the two terms often get merged. On this site we use the narrower sense - one piece hitting several targets.

Q. The opponent can stop the fork from landing - is it still worth playing? Often yes. The opponent has to spend a move stopping the threat. If that move creates another weakness, the threat has done its job. Look two or three moves ahead, not just at the immediate fork.

Q. Why are pawn forks effective despite the weakness of pawns? A pawn can threaten two more valuable pieces at once. But the outcome depends on whether a piece capturing the pawn can be recaptured and whether the opponent has a check or stronger threat. If the forking pawn is undefended, one of the attacked pieces can simply take it, and that capture loses nothing.

Q. Why are knight forks visually harder than other forks? Sliding pieces (bishop, rook, queen) attack along straight lines that the eye reads at a glance. Knight L-jumps must be drawn mentally each time. Learning the eight knight jump squares as a visual pattern makes them easier to spot.

References

• Progress With Chess, It's a Fork! (royal fork: king and queen). https://progresswithchess.org/wp-content/uploads/2023/12/01-Its-a-Fork-Intermediate-Worksheet.pdf

• Lichess, puzzle theme Fork (the source of this site's puzzle tags). https://lichess.org/training/themes

• Statistics produced by scripts/analyze-theme-stats.mjs --theme fork; the run is recorded in docs/data/fork-stats.md.

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Start training: Fork Training

Related: Pin · Skewer · All tactics