It belongs to the broader chess tactics lesson collection. The pattern is easy to name, but it wins material only when the front target must move and the rear target cannot escape tactically.
Skewer versus pin
Both motifs align three pieces, but the order of value differs:
- In a pin, the less valuable or movable piece stands in front of a more important target and is restricted from moving.
- In a skewer, the more valuable or urgent target stands in front and is forced to move, exposing the piece behind it.
When the front target is the king, the skewer is forcing because check must be answered. When it is a queen, the opponent may have tactical alternatives such as a counter-check or queen trade.
The geometry of a skewer
Look for three elements on one clear line:
- your bishop, rook, or queen;
- the high-priority front target; and
- another target behind it.
The line must remain open after the front piece moves. If the rear piece can move at the same time, block, or defend itself tactically, the skewer may not win material.
King skewers
A check along a line can force the king away and reveal a queen, rook, or loose piece behind it. These are the clearest skewers because the king cannot ignore check.
Calculate every legal king move, capture of the checking piece, and possible block. If the check can be blocked while protecting the rear target, the tactic may fail.
Queen skewers
A bishop, rook, or queen can attack the opposing queen with a rook or piece behind it. The queen often moves, allowing the rear target to fall.
But attacks on the queen are not as forcing as checks. The queen may capture the attacker, trade queens, move with check, or create a stronger threat. Search those resources before counting the rear piece as won.
Endgame skewers
Kings, rooks, and passed pawns often align in endgames. A rook can check the king from the side and capture an undefended pawn after the king moves. A bishop can force the king off a promotion square and then take a blocker.
Endgame skewers depend on precise move order. The rear pawn may advance with tempo or be protected by the king after it moves.
How to create a skewer
The targets may not begin aligned. You can create the line by:
- checking the king onto a file or diagonal;
- exchanging a blocker;
- decoying the front target to the desired square;
- opening a file with a pawn capture; or
- forcing the rear target to remain through a pin or overload.
Work backward from a desirable alignment, then find the forcing move that creates it.
A skewer calculation checklist
- Confirm the front and rear targets are truly aligned.
- List every response to the first attack.
- Check whether the attacker survives.
- Determine where the front target can move.
- Verify that the rear target cannot move, block, or create a counter-threat.
- Calculate the final capture and any recapture.
The skewer is complete only when the final exchange is favorable.
How to defend against skewers
- Avoid aligning king and queen or king and rook on open lines.
- Move the rear piece before the check becomes available.
- Block the attacking line with a protected piece.
- Capture or exchange the line attacker.
- Move the front piece with tempo, ideally a check.
- Protect the rear target so the final capture is unfavorable.
When an opponent's bishop, rook, or queen enters an open line, look beyond the first attacked piece.
Common skewer mistakes
- Calling a position a skewer when the rear target is more valuable and the front piece is pinned instead.
- Assuming an attack on the queen forces a passive retreat.
- Missing a block or capture of the checking line piece.
- Winning the rear piece but trapping the attacker.
- Overlooking that the rear target can move after the front target does.
- Ending calculation before the final recapture.
Practice exercise
Place a king and rook on the same file, then add an opposing rook that can check along that file. Change one defender or blocker at a time and decide whether the skewer wins the rook.
Repeat on a diagonal with bishop, king, and queen. List every legal defense before declaring the tactic sound.
Frequently asked questions
Which pieces can make a skewer?
Bishops, rooks, and queens create standard skewers because they attack along lines.
Is a skewer always a check?
No. The front target can be a queen or other valuable piece, though king skewers are the most forcing.
Can the rear piece be protected?
Yes. A skewer may still occur, but the final capture might be unfavorable if the attacker is recaptured.
What to learn next
Compare skewers with pins and learn how decoys can force targets onto the same line.