SudoKanard

 Full Rank Sudoku Apply classic Sudoku rules. Full rows/columns (read left-right, right-left, top-bottom, bottom-top) form 36 distinct 9-digit numbers. Their ranks from the lowest are given. Solve on Penpa: https://tinyurl.com/2laz99vw

 Battenburg Little Killer Sudoku Apply classic Sudoku rules. Whenever two odd and two even digits form a 2×2 chessboard pattern, a Battenburg marking is given. If there is no marking, the above pattern is not allowed. Each clue outside the grid indicates the sum of the digits contained in the cells in the direction of the corresponding arrow. Solve on Penpa: https://tinyurl.com/2ld3ktjp

 Position Sums Sudoku Standard 6x6 Sudoku rules. On each row, the leftmost two digits are A and B. An unshaded number in the left margin is the sum A+B of the corresponding row. A shaded number in the left margin is the sum of the Ath and Bth digits in the corresponding row starting from the left. The same applies to columns starting from the top. Solve on Penpa: https://git.io/JgAG2