Absolutely Nasty® Sudoku Level 4

Omtale

Warning! Only the most skilled sudoku experts should try these mind-blowing puzzles! In this series, you will find puzzles truly worthy of the label "hard." The four volumes of this series range from Level 1 to Level 4, increasing in difficulty with each book. At Level 4, even the fearless approach the mind-melters inside with trepidation.