Aperçu gratuit du livre 400 classic Killer sudoku 9 x 9 VERY HARD + BONUS 250 Hidoku puzzles: Sudoku with VERY HARD levels puzzles and a Hidoku 9 x 9 very hard levels
400 classic Killer sudoku 9 x 9 VERY HARD + BONUS 250 Hidoku puzzles: Sudoku with VERY HARD levels puzzles and a Hidoku 9 x 9 very hard levels