I know with unique rectangles with pairs, like if two houses that are next to each other, and their are three that make up the corners that the fourth corner can be wiped of the pair.
I want to know if this exact same concept works, if it is just a single. So I got three corners with a 2, and I want to erase the 2 in the fourth corner (there is only 2 houses, so if pairs the unique rectangle move works).
2 289 <---Want to remove that 2, so its just 89.
----------^House
2 2
------------^House
Two houses stacked on each other.