How to play

  • Select an empty cell and choose a number from 1 to 9 to fill it;
  • The objective is to fill all the cells following these three basic rules:
    • Don't repeat the numbers in the same row;
    • Don't repeat the numbers in the same column;
    • Don't repeat the numbers in the same subgrid (3x3 box);

For more instructions and explanations about strategies (ranging from basic to advanced), read our guide (written by a former Sudoku Grandmaster): How to Play and Strategies.

More games

Greek Logic
Greek Logic

Fill the grid using the Greek letters.

Zebra Puzzles
Zebra Puzzles

Use logic deductions to solve problems that are similar to the Einstein's Riddle.

Einstein's Riddle
Einstein's Riddle

Einstein said that only 2% of the world could solve this problem. Can you do it?

Logic Grid Puzzles
Logic Grid Puzzles

Complete the grid by using logic and the given clues of each problem.