This puzzle consists of 16 L-shaped congruent tiles (half of them are mirrored shape) as shown in the above figure, where each tile made from 4 equal sized squares. Tiles are not reversible. The object of this puzzle is to put the tiles together to form 8 x 8 square board with matching patterns and make the pattern periodic in whole. The tiles collects all possible patterns, where a pattern can be arbitrary clipping of the L-shape squarely from the periodic pattern shown at lower left of the figure. This puzzle is extremely difficult.
The above picture is a photo of crafted one which I renewed. There are 2 other possibilities of inequivalent shiftings of periodic pattern on the board.
Put the 6 step-shaped tiles shown in the above figure (4 tiles of 4 steps, a tile of 6 steps and a tile of 7 steps) into square frame of 10 x 10.
In the picture below is a work made by Peter Knoppers who is a puzzle designer in Netherlands. Perfect finish. (material: MDF; made with laser cutting machine ...wow! Thanks Knoppers ;-) )
