A stimulable phosphor panel comprises a substrate having rigidity, a stimulable phosphor layer, and a transparent water vapor proof cover, which are overlaid one upon another in this order. Connection assemblies generally include the male fitting having a pair of clasps that releasably interact with corresponding catch structures on the female fitting. Information about the matching users is provided to the user targeters in a manner that obscures the identity of those users. Unique scoring is offered based on multiple variables such as level of difficulty, elapsed time to complete the puzzle, percentage of solutions correct, etc.