Patent ID: 7284757

Claim:
A puzzle comprising: a closed edge area comprising a solid, fixed frame encompassing a placement area, a group of a plurality of congruent identically shaped puzzle pieces which, when properly placed, can completely fill said placement area, wherein the puzzle pieces comprise indicia on at least one side which, when the puzzle pieces are properly fitted together, form a predetermined image, each puzzle piece having a circumference consisting of five lines that connect corner points defining an irregular equilateral pentagon with angles of 36°, 108°, 108°, 36°, 252°, each line being a centrally symmetrical non-straight line with respect to straight lines extending between respective corner points and comprising a shape that permits the puzzle piece to tile a plane, wherein the five lines do not intersect or touch each other except in the corners of the irregular equilateral pentagon, wherein each of said centrally symmetrical non-straight lines forms a back cut to allow the puzzle pieces to hook to each other for a secure connection; and wherein said placement area and said plurality of puzzle pieces comprise six of said irregular equilateral pentagon-shaped puzzle pieces arranged so that their external corner points define an octagon.