Focus Sudoku
A distraction-free Sudoku designed to train working memory and logic.
Loading...
🎯 How to Play
The Objective
Fill the 9x9 grid so that each column, each row, and each of the nine 3x3 grids contains all of the digits from 1 to 9.
The Rules
- No number can be repeated in any Row.
- No number can be repeated in any Column.
- No number can be repeated in any 3x3 Box.
Beginner Tips
- Start Easy: Look for blocks, rows, or columns that have the most numbers filled in.
- Scan: Click a number (like 1) to highlight all 1s on the board. See where a 1 is missing in a box.
- Use Note Mode: Press 'N' or click the "Note Mode" button to toggle note-taking. When active, numbers you type will appear as small pencil marks in the corner of the cell. Use this to mark possible candidates when you're not sure yet. Notes don't count as mistakes!
Cognitive Benefits
🧠
Working Memory
Holding numbers and possibilities in your mind trains short-term memory capacity.
🔍
Logical Deduction
Systematic elimination of possibilities strengthens logical reasoning.