sudoku board game
1 - g : Enter number/character
SPACE : Clear tile
ARROW KEYS : Move cursor
q : Quit
n : New board
r : Restart
? : Hint (not like in other games)
F1 & F2: Help on controls & gameplay
PgDn,PgUp,, : Scroll
YOU CAN ALSO USE THE MOUSE!
Fill the table with digits (and characters)
so that all the rows, columns and smaller subregions
contain all of the digits from 1 to 9 and all
the alphabet letters from 'a' to 'g'.
Doesn't guarantee a unique solution. Attempts to fix that are welcome.