Books ·HTML edition Nikoli Japanese logic puzzles, modelled and solved 25 chapters · About the book ✠ 1 Kakuro 2 Sudoku 3 Skyscrapers 4 Kakurasu 5 Takuzu 6 KenKen 7 Flow Free 8 Squares Sudoku 9 Slitherlink 10 Hashiwokakero 11 Akari 12 Shikaku 13 Nurikabe 14 Masyu 15 Hitori 16 Fillomino 17 Heyawake 18 Shakashaka 19 Marupeke 20 Walls 21 L-Panel 22 BlockNumber 23 Searchlights 24 Numbrix 25 3-in-a-Row