How to approach this level
Keep notes accurate and scan a single digit across rows, columns, and boxes before relying on a new pattern.
Use arrow keys to move one cell, Home and End to move within a row, digits 1 through 9 to enter a value, N or Space to toggle notes, hold Shift to temporarily reverse the input mode, H to request a hint, Shift plus H to apply an explained step, and Escape to pause.
Game paused
Puzzle complete
Your result has been saved on this device.
About expert Sudoku
Solvers who want a more open grid and are comfortable checking candidate positions across the full board.
If one box gives no answer, scan one digit through all nine boxes and compare where it can still fit. After every placement, check the crossing row and column again.
Use hints as instruction
Select Explain to preview one supported step. Read the candidates and reason before choosing Apply step.
What to learn next
Review hidden singles and a repeatable scanning order before trying optional advanced patterns.
Review hidden singlesPrefer paper?
Print four certified expert puzzles with a separate answer key.
Open the expert printable sheet