Su Doku Library Books


Su Doku Library Books should be used in conjunction with the Pappocom Sudoku software, which is available for purchase from


The puzzles, all of which are solvable by logic alone, are graded according to the toughest pattern to appear.

The Pappocom software will label Swordfish and Nishio puzzles 'Arguably Unfair'. I would agree that Nishio puzzles are arguably unfair - however, it seems a trifle harsh to apply this label to Swordfish puzzles.

Available library books

The following books are available for download:

Microsoft does its bit to make the download procedure more complicated than it might be: