CHESS
Difficulty level
Easy
Non-Attacking Knights
Clarifications
- The knight jumps in an “L” shape and can leap over other pieces.
- Two knights threaten each other if one can reach the other’s square in a single jump.
- The central square also counts as a valid position for a knight.
Place knights on the 3 × 3 board so that none threatens another.
What is the maximum number of knights you can place without them threatening each other?
Have you solved it?
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Solution and explanation
One solution is to place knights on squares 1, 3, 5, 7 and 9. The arrangement 2, 4, 5, 6 and 8 is also valid. The maximum is 5 knights without them threatening each other.