🔥 Expert Sudoku #1
25 clues • Unique solution guaranteed
9
4
4
3
2
5
9
8
6
5
8
4
1
5
7
9
4
2
7
9
5
8
3
2
3
Given
Puzzle Controls
💡 Solving Tips
- • Start with rows/columns that have the most numbers
- • Look for numbers that can only go in one cell
- • Check each 3×3 box for missing numbers
- • Use pencil marks for candidates when printing
Puzzle Details
Difficulty:Expert
Given Clues:25
Empty Cells:56
Puzzle ID:136061182
About Expert Sudoku Puzzle #1
This expert Sudoku puzzle offers the ultimate test requiring expert-level techniques and deep analysis. With 25 given clues, this puzzle is guaranteed to have exactly one unique solution.
How to Solve
Basic strategies for solving this Sudoku puzzle:
- Scanning: Look for numbers that can only go in one cell
- Marking Candidates: Write possible numbers in empty cells
- Elimination: Remove candidates based on filled numbers
- Pattern Recognition: Look for pairs, triples, and other patterns
- X-Wing & Swordfish: Advanced pattern-based techniques
- Coloring & Chains: Complex logical deduction methods
Puzzle Features
- Difficulty: Expert (22-25 clues)
- Given Clues: 25 numbers provided
- Unique Solution: Guaranteed single valid solution
- Algorithm Generated: Created using backtracking algorithm
- Printable: Download as PDF for offline solving
Tips for Success
Start by scanning the grid for easy placements. Look for rows, columns, and 3×3 boxes that are nearly complete. Mark potential candidates in pencil if printing, or use the show solution toggle if you get stuck.
This puzzle is generated using a sophisticated backtracking algorithm that ensures a valid Sudoku grid with exactly one solution. The clue placement is randomized while maintaining solvability, providing a fresh challenge every time.