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
Sudoku 25x25 50 Giant Medium Sudoku Puzzles - Jacob James - Häftad (9781979444712) | Bokus
Sudoku 25x25 50 Giant Medium Sudoku Puzzles by Jacob James: New 9781979444712 | eBay
SUDOKU 25 X 25 By David Badger **BRAND NEW** 9781503317512 | eBay
Sudoku 25x25 50 Giant Medium Sudoku Puzzles, Jacob James | 9781979444712 | Livres | bol.com
25x25 Giant Sudoku Book
Calcudoku puzzle forum - View topic - Extra Large Killer Sudoku
Sudoku
Sudoku 25x25 50 Giant Medium Sudoku Puzzles by Jacob James | Goodreads
Sudoku 25x25 by ABCOM
25x25 Sudoku Magazine
Sudoku 25x25 by ABCOM
Alphadoku image example, 25X25 sudoku puzzle, asymmetric, expert No. 10000.