SudoKanard

 Renban Sudoku Standard Sudoku rules apply. Digits along each gray line must be a set of consecutive digits in any order and must not repeat. Penpa link to solve online: https://tinyurl.com/2xttj926 SudokuPad link to solve online:  https://tinyurl.com/35k3kcn3 Solve on video (commentary in French): https://www.youtube.com/watch?v=pz68CJF9l-Q

 Between Quadruple Sudoku Standard Sudoku rules apply. Digits in a small circle must appear at least once in the surrounding four cells. Digits on a gray line must lie strictly between the digits in the grey circles at the ends of the line. Solve on Penpa: https://tinyurl.com/y8fy62ug Solve on CtC:  https://bit.ly/3NlIS4A