Video Tutorials

Learn the rules and strategies for grid-based logic puzzles with these video tutorials. Subtitles are available in multiple languages—use the video player controls to select your preferred language.

Calcudoku Introduction

Learn the rules and basic strategies for solving Calcudoku puzzles, including how cages and operations work.

Killer Sudoku Introduction

Learn the rules and basic strategies for solving Killer Sudoku puzzles, including how cages and sub-grids work.