Plain-English Definition
Many tactics begin by identifying the only defender. Remove it, and a capture, mate, or promotion becomes possible.
Why It Matters
It trains you to see pieces by responsibility, not only by value.
Common Signs in Games
- Only one piece protects the target.
- That defender can be captured with tempo.
- A recapture would leave mate or material hanging.
Common Mistakes
- Removing a defender that can be replaced.
- Ignoring the order of captures.
- Forgetting the defender may be pinned.