Puzzles/Subdivisions/Subdividing a cornerstone/Solution

Subdividing a cornerstone Solution Think of every square as a combination of 4 smaller squares like this one -- -- | | | -- -- | | | -- -- -- -- | | | | | -- -- -- -- | | | | | -- -- -- -- This piece have 12 pieces so every identical piece must have 3 small squares. Then the solution is -- -- | | -- | | | -- -- -- | | | | -- -- | | | -- -- -- --