Plain-English Definition
A skewer is the pin turned inside out. You attack the high-value piece first, and when it moves, the piece behind it falls.
Why It Matters
Skewers build discipline around line geometry and forcing checks.
Common Signs in Games
- King and rook share a rank, file, or diagonal.
- A checking line attack is available.
- The front piece must move.
Common Mistakes
- Ignoring checks as candidate moves.
- Missing diagonal skewers with bishops.
- Trading into a position where the skewer disappears.