a different way on each face although the exterior face pattern 112 and interior face pattern 114 shown in fig1 a and fig1 b differ and are rotationally asymmetric in another variation they are rotationally symmetric and differ only by color or texture for example each of the six faces of the puzzle block 102 may simply bear a different color and the correct orientation of each puzzle block in the solved state is enforced by the required color of each face of the overall puzzle in the solved state when the size of the block puzzle 100 is 2 u00d7 2 u00d7 2 each puzzle block 102 is a corner block and the exterior pattern 112 produces an aesthetic solution pattern on each face of the puzzle when the size of the block puzzle exceeds 2 u00d7 2 u00d7 2 additional puzzle blocks 102 with different face patterns are used in non corner positions for example utilising the linking face pattern shown on the left face of the puzzle block in fig2 a puzzle blocks interior to a face of the puzzle can utilise corner or linking face patterns as appropriate if the six faces of the puzzle block 102 simply bear different colors then a single puzzle block is suitable for all positions in the puzzle however if each face of the puzzle has a central block i e the size of the puzzle is odd in all dimensions then it can be useful to indicate the required color of the face by rendering the central block of each face with the same face specific color on each of its faces the puzzle blocks 102 can also be patterned pictorially as described above in particular when six pictures are used to.