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Classic
For Beginners
Daily Challenge
Nov 30
Printable Sudoku
Solver
Sudoku Maker
Strategies
Tips
Statistics
Achievement
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Easy
Lv.1
0 /3
Medium
Lv.1
0 /3
Hard
Lv.1
0 /3
Expert
Lv.1
0 /3
Master
Lv.1
0 /3
Extreme
Lv.1
0 /3
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stacks
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text_format Board Font
position_top_right
Note Settings
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Game Over

Sorry, You have made 3 mistakes and lost this game.

Take your time and use pencil mode for tricky spots.

#0

Congratulations!

You cracked the puzzle!

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Enter 1-9 digits (use 0/. for empty cells)

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Template Import
1.Readable

. 7 . | . 1 . | . . 5 . 4 9 | . . . | . 2 . . 5 . | . 3 . | . 4 1 -------|-------|------- 9 . . | . 7 . | . . . . . . | . 6 5 | . . 2 . . . | 3 . 2 | . 6 . -------|-------|------- 3 . . | . 5 9 | . . 6 . . . | . . . | . . . . . . | 6 . . | 7 3 .

ClassicFor Beginners
Daily Challenge
Nov 30
PrintableStrategies
More
Lv.0
Easy
Lv.1
0 /3
Medium
Lv.1
0 /3
Hard
Lv.1
0 /3
Expert
Lv.1
0 /3
Master
Lv.1
0 /3
Extreme
Lv.1
0 /3
0/3
0
0/3
#0
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Hints

What Is Master Level Sudoku?

Master Sudoku is a pinnacle of logical mastery, and the most advanced Sudoku puzzles look for a constellation of patterns on different layers of the grid and require exceptional reasoning and deep analytical skills.

It also introduces advanced techniques along with very few starting clues, and each solution needs chain-based deductions. Master Sudoku puzzles test even the most seasoned Sudoku enthusiasts.

How to Improve Speed and Accuracy in Master Sudoku

  • Analyze Weak Cells: Pay attention to rows and columns with a lower number of filled cells, for instance, to find elusive pairs or triples more quickly.
  • Clean Your Notation: Focus on the most crucial possible values for pencil marks to aid in intuitive pattern identification.
  • Practicing Under Time Constraints: Reduce your solving time limits to increase your fluency and logical reflexes with more complex Sudoku patterns.