Eight Queens puzzle
Place eight queens on the board so that no two attack each other. When you have solved it, try the harder cousin: five queens that attack every square.
How it works
- Tap or drag queens from the tray onto the board.
- Solve it against the clock; your best time is saved.
- The second puzzle asks for five queens that together cover all 64 squares.
- Show solution displays the stored answer closest to the queens you placed.
What it trains
Both puzzles train how a queen's rows, columns and diagonals overlap. That is the same picture you need to judge whether a square is safe or a piece is overloaded.
Questions
How many solutions does Eight Queens have?
There are 92 in total, which come from 12 distinct patterns once rotations and reflections are counted as the same.
What is the five queens problem?
Five is the smallest number of queens that can attack every square of an 8×8 board. There are 4,860 ways to place them.