Experience the ultimate challenge with Krypt Gradient Puzzle by Ravensburger. This unique puzzle doesn't rely on a regular image pattern but instead on the intricate, spiral shape of the pieces. Designed for true puzzle enthusiasts, these puzzles encourage creativity and problem-solving. **Includes helpful hints to guide you when needed.** - **631 Pieces of Gradient-themed Puzzle**: Dive into an absorbing experience with this complex and intriguing gradient puzzle. - **Anti-glare Finish**: Made with patented thick cardboard and soft lining, featuring paper with a linen structure for reduced light reflection and enhanced clarity. - **SoftClick Technology**: Each piece is uniquely shaped, ensuring a perfect fit, exclusively designed by Ravensburger. - **Durable Design**: Crafted to withstand bending, thanks to hand-crafted stamping variety. Ravensburger, the world’s largest puzzle manufacturer with over 130 years of history, guarantees high-quality, premium puzzle experiences.