01
Artwork Difficulty
Eight weighted factors measure color separation, anchors, repetition, low-information areas, textures, boundaries, detail, and structure.
International Puzzle Rating Association
Know the challenge before the first piece.
Puzzle Challenge is a standardized 1–10 difficulty rating for 1,000-piece adult jigsaw puzzles, based on the artwork and the production cut.
One documented methodArtwork plus piece-cut effectsEvery rating is verifiable1,000-piece adult puzzles only
A common language for difficulty
Challenge is not guesswork.
IPRA separates the visual difficulty of the image from the effects of the piece cut, then combines them into a Total Solve Difficulty score.
02
Piece-cut effect
The actual cut can raise or lower difficulty, especially where the artwork gives the solver fewer reliable clues.
03
Independent review
Two evaluators score every eligible puzzle, with adjudication when their conclusions differ materially.
Puzzle Challenge 1–10
From Relaxed to Expert.
The scale describes the experience a solver should expect. Higher is harder, not better.
Protect the integrity of the mark
Verify the Rating ID.
Every legitimate IPRA medallion is tied to one puzzle and one public record. An absent or mismatched record is not a valid rating.
Check an IPRA rating
Enter the complete Rating ID printed with the Puzzle Challenge medallion.
For puzzle brands
Make difficulty easier to buy.
Give customers a clear expectation, reduce subjective claims, and create a consistent difficulty architecture across your catalog.