CHESS
Difficulty level
Easy
The Peaceful Queens
Clarifications
- A queen threatens along its row, column and diagonals.
- Two queens threaten each other if one can capture the other in a single move.
Place as many queens as possible on the 3 × 3 grid so that none threatens another.
What is the maximum number of queens you can place without them threatening each other?
Have you solved it?
Enter your answer for this challenge:
Solution and explanation
One valid placement is to put the queens on squares 2 and 7. The maximum is 2 queens, since a third one cannot be added without sharing a row, column or diagonal with one of them.