#240 Tango tiles
Set by Colin Wright
The new Astoria Hotel has a square ballroom with a chandelier hanging directly over the centre of it. There is one job remaining – to tile the floor.
The owner, Lord Fusspot, has three demands. First, the tiles must all be congruent (which means they are all of the same shape, but can be rotated and/or flipped). Second, for some superstitious reason, the edge or corner of a tile can’t be directly underneath the chandelier. Third, there must be an even number of tiles.
Not too unreasonable, is it? And yet this turns…