With 100 incredibly varied puzzles, including Hanjie, a huge range of Sudoku variants, Calcudoku, Killer Sudoku, Kakuro, Hashi, Slitherlink, Nurikabe, Masyu, Hitori, Futoshiki, Yajilin and many more, Sudoku Xtra is heaven for logic puzzle fans and casual solvers alike. Featuring hand-made puzzles created by Dr Gareth Moore, author of a wide range of puzzle and brain-training books, Sudoku Xtra brings together all of the most popular Japanese puzzles, as well as a sprinkling of more unusual types. Visit SudokuXtra.com for even more content details.