PuzzHiveRibbonvale
Renban Sudoku online
Fill each row, column and box once. Pink lines hold consecutive digits in any order.
Practice
Hint error details
Storage error details
Start small, then follow the lines
Eight original practice boards begin with 4 × 4 Sudoku and 2 × 2 boxes, then move to 6 × 6 Sudoku and 2 × 3 boxes. Every board has one solution, and its pink lines are needed to find it.
Daily play chooses a fixed board for the UTC date from four separate puzzles. Hint explains one forced digit. Each board keeps its progress in this browser, so switching modes leaves unfinished play saved.