SudoKanard

 Killer/Quadruples Sudoku Standard Sudoku rules apply. Killer : the digits in a cage must sum to the number printed in its corner; digits may not repeat within a cage. Quadruples : circled digits where four cells meet must be present as values in those four cells. Solve on Penpa: https://tinyurl.com/22685wop Solve on SudokuPad:  https://tinyurl.com/y4uw5arv

 Antiknight Quadruples Sudoku Normal Sudoku rules apply. Place the digits 1 through 9 in each empty cell. Digits must not repeat within the same row, column, or box. Circled digits where four cells meet must be present as values in those four cells. Digits must not repeat in cells that are a chess knight's move apart. Solve on Penpa: https://tinyurl.com/ydcqof5n Solve on CtC:  https://bit.ly/3CxYxJf