Shouldn't that 16 be a 256? 4 squares with 4 orientations each = 4^4 = 256. But yeah, definitely pretty doable with a brute-force memoized search. I imagine a

Shouldn't that 16 be a 256? 4 squares with 4 orientations each = 4^4 = 256. But yeah, definitely pretty doable with a brute-force memoized search. I imagine a lot of state space could be pruned by doing some analysis of when squares can only move further away from their home dots (and not be turned around or pushed back or anything).