8 Queens Puzzle Online - Play Free in Your Browser

The 8 Queens Puzzle is one of the most famous logic puzzles in history. Your task: place 8 queens on an 8×8 chessboard so that no two queens share a row, column, or diagonal. With 92 valid solutions to discover, it is challenging enough to occupy a first-time solver for 20 minutes and interesting enough to keep experts hunting for new solutions.

Our free online implementation is ready to play right now — no download, no installation, no account creation. Just click the button below and start placing queens.

Not all online Queens Puzzle implementations are equal. Here is what makes ours stand out:

Completely Free, Forever

No subscription, no premium tier, no ads blocking the board. The entire site is free to use for everyone, always. We believe logic puzzles should be universally accessible.

No Download or Installation

Everything runs directly in your web browser using standard web technologies. No app to install, no Java plugin, no Flash. If your browser can load a webpage, it can run our Queens Puzzle.

Works on Mobile and Desktop

The board is fully responsive and supports touch input on smartphones and tablets. The cell sizes adjust automatically to fit your screen, and tap-to-place works exactly like click-to-place on desktop.

Instant Conflict Feedback

As soon as you place a queen that conflicts with another, both queens are highlighted in red. You do not have to wait until you have placed all 8 queens to discover a mistake — the feedback is immediate, helping you learn from each placement decision.

Hint System

Stuck on a particular configuration? The hint engine uses an efficient backtracking solver to suggest a valid queen placement given your current board state. Use hints sparingly to preserve the challenge, but they are there when you genuinely need them.

Undo Button

Remove the last queen placed at any time with a single click. There is no limit on undos, so you can freely experiment with different approaches without having to restart the entire puzzle.

Auto-Solve Animation

Want to see how the backtracking algorithm solves the puzzle? The auto-solve feature animates through a complete solution step by step, making the algorithm visible and educational. Great for students and curious minds.

Built-In Timer

Every session is timed from your first queen placement. Track your solving speed and challenge yourself to beat your personal best. The timer stops automatically when you complete a valid solution.

New to the puzzle? Here is everything you need to get started:

1. Open the board. Click Play 8x8 to open the interactive 8×8 chessboard.
2. Place your first queen. Click any cell to place a queen there. Start with a corner or edge cell to give yourself more options in later rows.
3. Work row by row. Place one queen in each row, from top to bottom. This ensures the "one queen per row" constraint is automatically satisfied — you only need to worry about columns and diagonals.
4. Watch for red highlights. If a newly placed queen conflicts with an existing one, both cells turn red. This means they share a column or diagonal. Remove the new queen and try a different column in the same row.
5. Backtrack when stuck. If you reach a row where every column is either occupied or threatened, click Undo to remove the previous queen and try the next column. This is called backtracking and is the fundamental solving technique.
6. Complete the board. Once all 8 queens are placed with no conflicts (no red cells), you have solved the puzzle! The board will confirm your solution and display your completion time.

For deeper strategy guidance, visit the Queens Game Strategy page which covers beginner through advanced techniques. To understand the algorithm behind the puzzle, the learn algorithms section explains backtracking in detail.

While the 8×8 classic is the most famous, our platform supports 12 different board sizes. Each offers a meaningfully different challenge:

You could solve the 8 Queens Puzzle with pen and paper, or with physical chess pieces on a board. So why play online? Several reasons:

• Instant feedback prevents wrong-path investment. When playing with physical pieces, you might not notice a diagonal conflict until you have placed 7 queens and the 8th does not fit anywhere. Our board flags conflicts immediately after each placement, so you learn from each move rather than from exhaustive exploration.
• Undo is infinitely easier than physically moving pieces. Backtracking is the core technique, and having a one-click undo makes experimenting frictionless.
• Timer and performance tracking. You cannot easily time yourself with physical pieces. The built-in timer lets you measure improvement precisely.
• Auto-solve teaches the algorithm. Watching the animated solution is genuinely educational — you can see backtracking happen in real time. No physical demonstration can match this for clarity.
• Scalability. You cannot easily play a 15×15 Queens Puzzle with physical pieces. Our digital board supports sizes up to 15×15 with the same clean interface.
• Accessibility. Play on your phone during a commute, on your laptop during a break, or on a tablet at home. The puzzle is always one click away.

The online medium enhances the puzzle rather than replacing the mental challenge. All the thinking is still yours — the board just removes the friction that would otherwise prevent you from focusing on the logic.