{{ cell.solvedValue }}
{{ cell.entry ?? "" }}
Sudoku checker
Couldn't verify this puzzle ({{ errorReason }}). Double-check the link from the book -- it may be mistyped or damaged.
Puzzle seed {{ seed }} -- tap a number below, then tap every cell where that number belongs (tap the number again to stop); or focus a cell and type on a keyboard. Each cell is checked as you go.
{{ hintCaption }}
Checking puzzle...