Reduce large maze to single width corridors This reduces the permutations for a x x x b x To one (two steps north) from four (two steps north; one east, two north, one west; one east, one north, one west, one north; and one north, one east, one north, one west). Longer corridors were worse! We would filter this in the "been here before via another path" but that's still a lot of lookups in lists, which is inefficient.

# IF blocks are functions
if(true, "It is true", "It is false") println
if(false, "It is true", "It is false") println
# Or there's a more conventional long-hand, but it doesn't behave quite
# the same because we can't "println" the result - we'd need to put it
# inside the "then" and "else" functions
if(true) then("It is true") else ("It is false") #println