Sudoku rules illustrated
A completed grid highlights a row, a column and a 3×3 box to show the three standard Sudoku constraints.
Your first three Sudoku moves
Three real moves from the easy puzzle, with each newly filled square highlighted.
How to read this diagram
Read the panels in order. In each highlighted square, the row, column and box leave only one possible digit.
Try the original easy puzzle from the image library and follow these same moves. The highlighted values agree with its unique solution.
Image prepared by Sudokumax. Updated .
More to explore
All Sudoku images
X-Wing Sudoku diagram
A candidate diagram shows the four corners of an X-Wing and the sevens it eliminates in the shared columns.
Naked pair Sudoku: before and after
A row-level diagram shows two cells containing only 3 and 7, followed by the candidate eliminations they allow.