Extreme Sudoku Puzzles - Free Online Ultimate Challenge
Extreme sudoku puzzles are the absolute pinnacle. With just one number given at the start, you're facing a puzzle where 80 numbers have been removed. This is as hard as sudoku gets. These puzzles require flawless execution of every advanced technique in your arsenal and can easily take 90 minutes or more to solve. They're designed for the most dedicated solvers who want to test themselves against the ultimate challenge.
Why Try Extreme Sudoku?
- Just 1 starting number - with 80 removed, this is the ultimate test
- Demands perfect execution of every advanced technique you know
- Expect 90+ minutes of intense, focused solving
- For elite players who want the absolute hardest sudoku experience
How to Approach Extreme Sudoku
Here's what it takes to solve extreme sudoku puzzles:
You Need Every Technique Extreme puzzles don't play favorites. You'll need chains, forcing chains, ALS, coloring, X-wing, swordfish, and every other advanced technique working together in perfect harmony. There's no shortcut—you need to master them all.
Accept the Challenge With only one clue to start, you're going to spend a lot of time exploring possibilities and testing hypotheses. Don't get frustrated. This is meant to be the ultimate challenge. Embrace the difficulty and enjoy the process of working through it.
Keep Detailed Notes Use notes extensively. Track every logical deduction, every possibility you've eliminated, every chain you've built. With so few clues, every piece of information is precious. Systematic note-taking isn't optional—it's essential for solving extreme puzzles.
Ready for the ultimate test? Take on an extreme sudoku puzzle and join the elite circle of solvers who've conquered the hardest puzzles in the game.