Sudoku For Beginners

Sudoku means single number in Japanese, and the name hides the game's core rule. We trace its origin and real misspellings from our own search data.

Measured over 320 real solves: easy sudoku runs on a single 41-move naked-single chain, and even evil grids stay 61% singles before search takes over.

Learn the sudoku rules in 30 seconds, then see how the first moves of a real solve work: we generated 320 puzzles and logged every move our engine made.