Sudoku IQ - Train your Brain

Killer Sudoku – Daily IQ Test

Killer Sudoku – Daily IQ Test is a feature-rich Chrome extension that runs offline, offering five difficulty levels, customizable boards with themes, and a comprehensive set of brain-training tools. It caters to both beginners and puzzle experts with training and PRO modes, undo/redo, auto-save, notes (autofill and auto-clear), pencil marks, and an integrated learning tool for smarter solving. The intuitive interface works well on phones and tablets, with a clean design and responsive controls.

Key features include a global leaderboard and achievements, a collection of puzzles from novice to expert, auto error-checking, and flexible note options, making it a complete brain-training Sudoku experience. For support, email support@hashcube.com