pattern symbols

M	a known mine
0-8	a square with this number in it
-	a square known not to be a mine
+	a known square of any sort (including mines)
?	an unexplored square
*,#,$	each of these will match any square
a-z	a square with a number in it, and the number is remembered
|	a square off the board

NOTE: You do not need to create separate rules for symmetric patterns;
the system will automatically try each rule in every possible rotation and reflection.

scheme variables

a, b, c, etc...	number matched by the given letter
a-mine-count, b-mine-count, etc...	number of known mines surrounding the given letter
star-mine-count	number of known mines matched by *'s
star-unknown-count	number of ?'s matched by *'s
pound-mine-count pound-unknown-count dollar-mine-count dollar-unknown-count plus-mine-count plus-unknown-count	same as above for #'s, $'s, and +'s.     note that plus-unknown-count will always equal 0

right-hand-side commands

click-stars	explores all the unexplored squares under stars in the LHS pattern
mark-stars	marks all the unexplored squares under stars in the LHS pattern as mines
click-pounds mark-pounds click-dollars mark-dollars click-plusses mark-plusses	same as above for #'s, $'s, and +'s.