Pin vs Skewer: Know the Difference
Both tactics use a line-piece to trap a target behind another — but which piece does the attacker actually want?
A pin and a skewer are mirror-image tactics: both use a rook, bishop, or queen to attack two enemy pieces along the same rank, file, or diagonal. The crucial difference is which target sits in front and which sits behind — and which one the attacker actually wants.
Head-to-Head
| Aspect | Pin | Skewer |
|---|---|---|
| Valuable piece position | Behind the front piece (cannot move without exposing it) | In front (must move, giving up what hides behind it) |
| What the attacker wins | Positional advantage: front piece is immobilised | Material: rear piece is captured after the front piece moves |
| Front piece | Less valuable — shields the king or more valuable piece | More valuable — must evacuate, abandoning the weaker piece |
| Typical setup | Bishop pins a knight to the king; rook pins a rook to the queen | Bishop skewers the king; after king moves, bishop takes the rook |
| Long-term effect | Front piece loses mobility for as long as the pin holds | Immediate material gain — effect ends once pieces move |
When to Use Which
Use a Pin when…
Look for a pin when an enemy piece is shielding something more valuable directly behind it on the same line. The pin is especially powerful when you can reinforce the attacker or pile pressure on the pinned piece — attacking it with pawns or other pieces while it cannot safely move.
Use a Skewer when…
Look for a skewer when a powerful piece (often the king, queen, or rook) can be forced to step off a line, leaving a weaker piece unprotected. Skewers frequently arise in endgames where kings become active and rooks occupy open files.