mpuz-mode
mpuz-mode is an interactive compiled Lisp function in `mpuz.el
'.
(mpuz-mode)
Multiplication puzzle mode.
You have to guess which letters stand for which digits in the
multiplication displayed inside the `*Mult Puzzle*' buffer.
You may enter a guess for a letter's value by typing first the letter,
then the digit. Thus, to guess that A=3, type `A 3'.
To leave the game to do other editing work, just switch buffers.
Then you may resume the game with M-x mpuz.
You may abort a game by typing C-g.
This mode runs the hook `mpuz-mode-hook', as the final step
during initialization.