Pencil & paper Sudoku fans that need help will find that this [free & offline] app can help
them to identify & eliminate candidate digits, using Windows or Linux.
ASUD is a sudoku assistant tool designed to help with manually solving Sudoku puzzles.
It handles routine tasks so you can focus on more advanced puzzle solving strategies.
Algorithms have been added to detect and display (hidden or naked) pairs, triples, & quads,
whose display can be toggled.
Executables that run [offline...