Start a fresh board? Your current progress is kept in your playthroughs list.
Sudoku: Normal Sudoku rules apply; place the digits 1-9 once in every row, column, and 3x3 box. Renban Line: Digits along a solid pink line contain a non-repeating set of consecutive digits, in any order. Region Sum Line: Box borders divide hollow blue lines into segments with equal sums. Black Kropki: Cells separated by a black dot have one digit double the other. White Kropki: Cells separated by a white dot have consecutive digits.
Undertow
By Sotehr
Sudoku: Normal Sudoku rules apply; place the digits 1-9 once in every row, column, and 3x3 box. Renban Line: Digits along a solid pink line contain a non-repeating set of consecutive digits, in any order. Region Sum Line: Box borders divide hollow blue lines into segments with equal sums. Black Kropki: Cells separated by a black dot have one digit double the other. White Kropki: Cells separated by a white dot have consecutive digits.