🔥 Expert Sudoku #4
24 clues • Unique solution guaranteed
9
8
4
6
2
5
3
6
4
3
2
1
2
4
8
7
2
4
3
8
9
9
8
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:24
Empty Cells:57
Puzzle ID:136061185
About Expert Sudoku Volume 4
This volume contains expert Sudoku puzzles offering the ultimate test requiring expert-level techniques and deep analysis. Each puzzle has 24 given clues and is guaranteed to have exactly one unique solution.
How to Solve
Basic strategies for solving these Sudoku puzzles:
- 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
Volume Features
- Difficulty: Expert (22-25 clues)
- Given Clues: 24 numbers provided
- Unique Solutions: All puzzles 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.
These puzzles are generated using a sophisticated backtracking algorithm that ensures valid Sudoku grids with exactly one solution each. The clue placement is randomized while maintaining solvability, providing fresh challenges in every volume.