Sudoku for connoisseurs (16x16 and 25x25 grid sudoku of high difficulty)
Hardcover and downloads (pdf and ePub) available separately
February 21, 2011
Sudoku for connoisseurs (16x16 and 25x25 grid sudoku of high difficulty)
Hardcover and downloads (pdf and ePub) available separately
February 21, 2011