How to Solve Sudoku Faster: 5 Techniques That Cut Your Time
Five specific habits — not new strategies — that shave real minutes off your Sudoku solve time. All are learnable in one sitting.
Getting faster at Sudoku isn't about knowing exotic techniques — it's about scanning efficiently and stopping second-guessing. These five habits will cut your time on any daily Sudoku.
1. Scan by digit, not by cell
Beginners look at empty cells one at a time. Fast solvers pick a digit (say 7) and scan every row, column, and box for where the next 7 must go. It's the same information, ordered differently — and dramatically faster.
2. Fill in all naked singles first
Before you touch pencil marks, sweep the whole grid for cells with only one legal option. This is free progress and it opens up the next round of scans.
3. Only pencil-mark boxes you're stuck on
Pencil-marking every empty cell wastes time. Fast solvers only pencil-mark a box or row when scanning fails there — usually mid-game.
4. Commit and move
If you've verified a placement, write it and move on. Re-verifying every entry is the biggest hidden time sink at every skill level.
5. Practice the same difficulty daily
Speed is a specific skill. If you want to be fast at medium, play medium every day. Bouncing between easy and expert doesn't build speed at either.
Practice today
Play today's daily Sudoku and time yourself. If you're new to systematic solving, start with our Sudoku solving techniques for beginners post before optimising for speed.
Frequently asked questions
How can I solve Sudoku faster?
The single biggest gain is scanning by digit instead of by cell — pick a number and hunt for where it must go across rows, columns and boxes.
Should I pencil-mark every cell?
No — that's a common time sink. Only pencil-mark boxes or rows where scanning has already failed.
What's a good time for a medium Sudoku?
For casual solvers, 8–12 minutes is strong. Speed solvers routinely finish medium puzzles under 5.
Does difficulty affect what technique to use?
Easy and medium: naked and hidden singles plus scanning. Hard: pencil marks and pointing pairs. Expert: advanced patterns from a strategy guide.
Where can I play daily Sudoku to practice speed?
The daily Sudoku at puzzletheory.fun/games/sudoku serves one puzzle per difficulty per day — perfect for consistent speed practice.
Play a puzzle
Put the ideas from this article into practice with today's daily challenge — or browse all our games.