CHESS
Difficulty level
Easy
The Pawn Wall
Clarifications
- All pawns advance toward the top of the board.
- They attack only one square diagonally forward.
Place as many pawns as possible on the 3 × 3 board so that no pawn threatens another.
What is the maximum number of pawns you can place without them threatening each other?
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Solution and explanation
One valid arrangement is to occupy squares 1, 2, 3, 7, 8 and 9. Several arrangements are possible; the maximum is 6 pawns without them threatening each other.