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All the puzzles shown on this site were created by the author.
Some of them can involuntarily duplicate the work of another puzzle designer. The author
wants to assure that none of the ideas shown were borrowed. In order to prove the
authenticity, the author obtained a number of patents covering following designs: The Magic Crystals, The Quad Squad, The Big Serpent and some of the puzzles from The Hard Nut set.The author will appreciate any comment or
suggestion regarding authenticity of his work.