Starting positions  This might not matter at all but attempting to be correct The photo and diagram showing the start position are actually mirror image of each others position not the same position I know game play would be exactly the same but chess mirror imaged would also play the same but is generally considered wrong Edward de Bonos web site doesnt comment if one is right and the other is wrong but the picture on his site matches the position of the photo here not the diagram so the pieces look like an L not a mirror image of one I dont know if its mentioned in the rules with the game of anyone who owns one If this is so the diagram may need to be flipped   It maybe should be mentioned that the mirror image start position is either acceptable wrong or simply not mentioned by de Bono but that game play would be the same anyway