♛ N-Queens Puzzle
Master the classic chess puzzle with strategic thinking and logic
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Objective

Place N queens on an N×N chessboard so that no two queens can attack each other. This is a classic logic puzzle that challenges your strategic thinking!

♛ Master the art of royal placement and become a chess strategist!
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How to Play

  • Click on a square to place a queen (♛)
  • Click on a queen to remove it
  • Place exactly N queens on the N×N board
  • Ensure no conflicts - queens cannot attack each other
⚔️

Queen Attack Patterns

A queen can attack in 8 directions:
Horizontally
Left and right across the row
Vertically
Up and down the column
Diagonally
Both diagonal directions (4 diagonals total)

Important: No two queens can be on the same row, column, or diagonal!

💡

Strategy Example

🏁 Here's one solution for the 4-Queens puzzle:
□
♛
□
□
□
□
□
♛
♛
□
□
□
□
□
♛
□

✅ Notice: No queen can attack any other queen

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Difficulty Levels

4×4 Board
4 queens - Good for beginners (2 solutions)
5×5 Board
5 queens - Moderate challenge (10 solutions)
6×6 Board
6 queens - Tricky puzzle (4 solutions)
7×7 Board
7 queens - Challenging (40 solutions)
8×8 Board
8 queens - Classic puzzle (92 solutions)
9×9+ Board
9+ queens - Expert level (many solutions)
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Solving Tips

🧠 Master Strategies
Start with corners: Try placing a queen in a corner first
Work systematically: Place queens row by row or column by column
Think ahead: Consider how each placement affects future options
Use elimination: Mark which squares become unavailable
Backtrack when stuck: Remove queens and try different positions
🎓

Fun Fact

The 8-Queens puzzle was first posed in 1848 and has exactly 92 different solutions! It's a classic problem in computer science and artificial intelligence.

This puzzle teaches important concepts like:

  • Backtracking algorithms - Learn how computers solve complex problems
  • Constraint satisfaction - Understanding rules and limitations
  • Strategic thinking - Planning moves and anticipating consequences
  • Pattern recognition - Identifying safe and dangerous positions