Thorns
(Published on 3. August 2026, 11:58 by tjmac28)
Solve on SudokuPad
Normal Sudoku Rules: Fill each row, column and 3x3 box with each digit 1-9.
Kropki Dots: Cells separated by a black dot contain digits in a 1:2 ratio. Cells separated by an outlined white dot contain consecutive digits.
Thorns: Any three adjacent cells along a line must contain exactly one 'thorn'. From each thorn cell the line containing the cell will extend to one of the 8 adjacent cells from the thorn. Thorns are not given and must be deduced. Thorns cannot cross or enter a cell containing another line or thorn.
Renban Lines: Cells along a red line contain a set of not repeating consecutive digits in any order.
Between Lines: Digits along a pink line must be strictly between the digits in the two circles on the line.
Arrows: Cells along a red arrow contain digits summing to the digit in the connected circle.
German Whisper Lines: Adjacent digits along a green line have a difference of at least five.
Sequence Lines: Adjacent digits along a grey line must share a common difference (digits may repeat if allowed by other rules).
Anti-Thorn Dots: Thorns cannot be present in a cell containing a large outlined white dot.
Normal Sudoku Rules: Fill each row, column and 3x3 box with each digit 1-9.
Kropki Dots: Cells separated by a black dot contain digits in a 1:2 ratio. Cells separated by an outlined white dot contain consecutive digits.
Thorns: Any three adjacent cells along a line must contain exactly one 'thorn'. From each thorn cell the line containing the cell will extend to one of the 8 adjacent cells from the thorn. Thorns are not given and must be deduced. Thorns cannot cross or enter a cell containing another line or thorn.
Renban Lines: Cells along a red line contain a set of not repeating consecutive digits in any order.
Between Lines: Digits along a pink line must be strictly between the digits in the two circles on the line.
Arrows: Cells along a red arrow contain digits summing to the digit in the connected circle.
German Whisper Lines: Adjacent digits along a green line have a difference of at least five.
Sequence Lines: Adjacent digits along a grey line must share a common difference (digits may repeat if allowed by other rules).
Anti-Thorn Dots: Thorns cannot be present in a cell containing a large outlined white dot.
Solution code: Row 5, left to right.
Solved by SKORP17, kangaroo
