Abstract: A dissection puzzle comprising a set of pieces, each piece in the set having an obverse face and a reverse face and a plurality of straight edges about said faces, and wherein said set of pieces may be formed into an assembled puzzle of straight-sided geometric shape by arranging the pieces in edge-to-edge abutting relationship, the form of the pieces being selected such that the area of each piece is selected from a set areas of different rational ratios to the area of the assembled puzzle and characterised in that: the obverse face and the reverse face of each piece include markings selected from a predetermined set of markings such that when arranged to form the assembled puzzle and viewed from one side, each edge of each piece adjacent another piece is adjacent a piece having a different marking.

Abstract: A game or puzzle comprising a plurality of polyomino pieces, each piece having on opposite faces one or more squares, said squares on each said piece and on opposite faces having markings wherein such said markings of said squares in total on both faces of said pieces comprise four or more different markings such that the pieces are capable of being assembled using their obverse faces only into a first set of one pattern comprising squares with the markings of the squares on the obverse faces of the assembled pieces forming a checkerboard pattern of two alternating markings which may be used for playing a checkers or chess type game, and the pieces may be further assembled into a second set of one or more patterns using the reverse faces of some of the pieces and the obverse faces of the remaining pieces, each pattern in the second set comprising squares forming a further checkerboard pattern of four or more markings, one of said markings being in an alternating checkerboard pattern with the remaining marking

Abstract: A game or puzzle comprising a plurality of polyomino pieces, each piece having on opposite faces one or more squares, said squares on each said piece and on opposite faces having markings wherein such said markings of said squares in total on both faces of said pieces comprise four or more different markings such that the pieces are capable of being assembled using their obverse faces only into a first set of one pattern comprising squares with the markings of the squares on the obverse faces of the assembled pieces forming a checkerboard pattern of two alternating markings which may be used for playing a checkers or chess type game, and the pieces may be further assembled into a second set of one or more patterns using the reverse faces of some of the pieces and the obverse faces of the remaining pieces, each pattern in the second set comprising squares forming a further checkerboard pattern of four or more markings, one of said markings being in an alternating checkerboard pattern with the remaining marking

Abstract: A game or puzzle including a plurality of polyomino pieces which have the obverse sides and the reverse sides marked with different markings, there being a least three markings in total on the obverse and reverse sides of the piece. The pieces may be assembled using both sides into different arrays of eight by eight squares defining checkerboard patterns for use in playing the game of chess or checkers. The pieces may also be assembled into a cube comprising four by four squares.