In short
The bishop grabbed a pawn on a2. Now look at its exits: b1 and b3. The king guards b1. Close b3, and it’s caught.
What you learn here
- Count a piece’s escape squares, not just its attackers.
- Pawn grabs deep in enemy land often get trapped.
The bishop grabbed a pawn on a2. Now look at its exits: b1 and b3. The king guards b1. Close b3, and it’s caught.