A puzzle of the kind in which a plurality of pieces assembles to form a panel which overlies a back board with means - for example, magnetic means - provided to cause the pieces to stick to the cooperating surface of the back board; <u>characterised by the features</u> <u>firstly</u> that the cooperating surface of the back board bears a pictorial display and <u>secondly</u> that the panel, when completed and when correctly positioned in its intended relative overlying relationship with the back board periphery deliberately obliterates at least a portion of that pictorial display.
