The Goal
Fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids contain all digits from 1 to 9 with no repeats.
Rows
Every horizontal row must contain 1–9 with no duplicates.
Columns
Every vertical column must contain 1–9 with no duplicates.
3×3 Boxes
Each of the nine 3×3 blocks must contain 1–9 with no duplicates.
Game Mechanics
Entering Numbers
Select a cell and click a number on the keypad or press 1–9 on your keyboard. Correct entries earn points based on difficulty.
Mistakes
If you enter a number that doesn't match the solution it counts as a mistake. 3 mistakes = Game Over!
Notes Mode
Toggle Notes (N key) to jot down possible candidates in a cell when you're unsure of the answer.
Hints
Stuck? Use a hint to reveal the correct number for a cell. However, using a hint awards zero points for that cell. If you solve the entire puzzle using only hints, your final score will be 0 points — challenge yourself and solve it on your own!
Scoring
Easy
100 pts
per correct cell
Medium
125 pts
per correct cell
Hard
150 pts
per correct cell
Expert
200 pts
per correct cell
⚠️ Hinted cells award 0 points regardless of difficulty.