You are playing 9x9 extreme puzzle 278240

Free online sudoku puzzles

Sudoku is a logic based number placement puzzle. The objective is to fill in the 9x9 grid so that each column, each row, and each of the nine 3x3 boxes (or regions) contains the digits from 1 to 9 only one time each. Starting with a partially completed grid, your objective is to find the one solution that correctly solves the puzzle. Every sudoku puzzle has one and only solution, and can be solved through logic alone.

Start over, and play another sudoku of this size and difficulty.

Optimized for: phone | switch to: desktop

Also try kakuro and hitori