(currently retired)
During 1991 and 1992 I spent considerable time designing a maze construction set. As part of that set, I designed a number of typefaces for displaying mazes. This typeface contain elements of those designs.
To use MM-Checkers properly, you need to type in a sequence of upper- and lower-case letters such as AaAaAa or BbBbBb. If you want to continue the pattern on the next line, reverse the starting order (to, for example, aAaAaA). For best results I recommend a PostScript printer.