Sudoku Tips for Faster Solving

Build a consistent scan

Speed comes from recognising useful patterns quickly, not from entering numbers sooner. Scan rows, columns and boxes in the same order so you spend less time deciding where to look next.

Practical solving tips

• Start with units that already contain many digits.
• Look for naked singles before adding extensive notes.
• Scan one number across all nine boxes to find restricted positions.
• Update candidates immediately after every placement.
• When stuck, switch from cell-by-cell scanning to number-by-number scanning.
• Review a mistake instead of immediately erasing it and continuing.

Use candidates selectively

Candidate notes are most useful when they reveal a pattern. Filling every empty cell with nine possibilities creates noise. Start with cells that have two or three realistic candidates, then look for repeated pairs or a number that appears in only one position within a unit.

Avoid racing the timer

Trying to solve fast before your process is reliable produces mistakes and weak habits. First aim for several clean solves at the same difficulty. Your time will improve naturally as familiar patterns require less conscious checking.

Know when to change difficulty

If you solve consistently without hints, move up one level. If you guess repeatedly or cannot explain your placements, step back and practise the relevant technique. Read the difficulty guide for a clearer comparison.