Sum Sudoku medium to hard

168 Sum-Sudoku PuzzlesMedium to hard difficulty levelAlso called killer Sudoku or sumdoku, or addoku, or sumokuPuzzle grids of 4x4, 6x6, 8x8, 9x9Two puzzles per pagePuzzles with regular sub-grids/sub-domains (square or rectangle)Several puzzles with irregular sub-domains (like in jigsaw Sudoku)Most puzzles have as initial clues only the corresponding sums of killer Sudoku.Few puzzles have additional initial clues consisting of digits (like in partially filled puzzles).The last 10 puzzles are variations with additional constraints like in diagonal Sudoku, Windoku, anti-king and anti-knight Sudoku, anti-diagonal Sudokunumber puzzlessudoku variation puzzlesmath puzzles