Practical · No gimmicks
Sudoku tips and tricks
Twelve habits that make boards faster — from first Easy scans to Hard candidate work. Practice on the live grid.
Play now · medium
Tap a cell, then a number
12 tips that compound
- 1
Scan by digit
Pick a number (say 7). Hunt every box for the only place 7 can go. Faster than staring at random empty cells.
- 2
Singles before pairs
Place Naked and Hidden Singles exhaustively before looking for fancy patterns.
- 3
Pencil marks on Medium+
When scanning stalls, mark candidates. Marks are not cheating — they are how strong players work.
- 4
One unit at a time
Finish a stubborn box or row completely before hopping around the grid.
- 5
Count to nine
If eight digits are placed in a unit, the last cell is free — easy points people skip.
- 6
Never double-place
If a digit already exists in a row, it cannot appear again there. Conflicts should feel automatic.
- 7
Learn Hidden Single early
A digit with only one home in a unit is the #1 intermediate leap. See the technique page.
- 8
Naked Pair cleanup
Two cells sharing the same two candidates lock those digits — strip them elsewhere in the unit.
- 9
Pointing pairs on Hard
When a box confines a digit to one line, eliminate it from the rest of that line.
- 10
Step away for 2 minutes
Fresh eyes catch singles you filtered out while frustrated.
- 11
Use Hint as a tutor
On Zeloku, Hint names a technique — read it, then find the next one yourself.
- 12
Match difficulty to mood
Easy for a reset, Medium for habit, Hard only when you have quiet time.
Go deeper
FAQ
- What are the best Sudoku tips for beginners?
- Scan by digit (not only by cell), place obvious singles first, and do not guess. Learn Hidden Single next — it unlocks most Easy and many Medium boards.
- Do Sudoku tips and tricks include guessing?
- No. Good tips remove the need to guess. A valid Sudoku has one solution reachable by logic. Guessing is a last resort for computers, not a skill for humans.
- What trick helps most on hard Sudoku?
- Full candidate pencil marks plus systematic pair and pointing patterns. When stuck, use our diagnostic guide for the technique you are probably missing.
- How do I get faster at Sudoku?
- Same difficulty daily, time yourself lightly, and add one new technique a week. Speed comes from recognition, not rushing.