Black or White, designed by Vesa Timonen and Tomas Linden. This took me an amazingly long time to solve, considering that it's relatively simple (but non-intuitive). The instructions, though simple, can be a little confusing; I think the distinction between "square" and "rectangle" and "square with internal voids" is very ambiguous. One of the included puzzles is to "make a 8/9 sized square on the table", so does this mean an 8x9 rectangle with or without voids, or a square that's a fractional 8/9 of a whole-sized square (whatever that might be). So the instructions must be interpreted somewhat liberally.
Each of the wooden pieces is double sided, one side white and one side dark-brown. The pieces are nicely made.