Sudoku Collection: 200 Very Hard Kropki Sudoku Puzzles 9x9
Szerző:
Alena Gurin
Kropki Sudoku is the variation of the original sudoku. If absolute difference between two digits in...
Kropki Sudoku is the variation of the original sudoku. If absolute difference between two digits in neighboring cells equals 1, then they are separated by a white dot. If the digit is a half of digit in the neighboring cell, then they are separated by blac