Alphadoku image example, 25X25 sudoku puzzle, asymmetric, expert No. 10000.
25x25 Giant Sudoku Book
25x25 Sudoku Puzzle Book Medium: Irregular Sudoku Variations Brain Logic Games For Adults : Edward Sevensam: Amazon.com.au: Books
Logic Puzzles: 25x25 Series - Sudoku
Looking for a great sudoku pen that can write small, not smudge, and still be legible. If anyone has any suggestion. I started doing these 25x25 sudoku puzzles and it's really hard
25x25 Sudoku: Keep Your Brain Active And Engaged With 100 Giant Hard Puzzles, Ultimate Sudoku Puzzle Book With Complete Solutions, Vol 10: Tahlia, Suzanna: 9798378325870: Amazon.com: Books
Greater Than Sudoku 25 x 25: Badger, David: 9781503316645: Amazon.com: Books