Standard Sudoku — but outside clues pin digits to the first cells
Choose a Level
Standard Sudoku
Fill every row, every column, and every box so each digit appears exactly once — just like classic Sudoku.
Outside Clues
A digit printed outside the grid means that digit must appear in one of the first cells of that row or column from that edge.
533
The 5 above the column means 5 must be in one of the top 3 cells of that column. The 3 to the left means 3 must be in one of the first 3 cells of that row.
Four Edges
Clues can appear on all four sides: left & right of each row, top & bottom of each column. Not every row or column needs a clue.
A clue from the RIGHT means the digit must be in the last 3 cells of that row. A clue from the BOTTOM means the digit must be in the last 3 cells of that column.
Tools & Stars
Use Notes for candidates, Hint when stuck, Undo any move. Solve fast with no mistakes and no hints to earn 3 stars.