Over & Under 5-loop Chain Puzzle - Inspired by Oskar van Deventer

Over & Under 5-Loop Chain Puzzle | Intersecting Track Sequential Puzzle by Gao

Challenge your logic and geometric intuition with the Over & Under 5-Loop Chain Puzzle, a highly sophisticated mechanical masterwork designed and manufactured by Gao. Drawing deep engineering inspiration from the legendary puzzle pioneer Oskar van Deventer’s classic 3-Loop concept, this advanced modification massively scales up the complexity. Moving away from standard twisty matrices, it introduces an expanded, continuous, and interwoven network of overlapping rotational tracks that will push your sequential solving skills to their absolute limits.

The puzzle features a heavy-duty, high-precision 3D-printed matte grey chassis structured around 5 interlocking circular tracks. Inside these channels sits an array of 120 vibrant, 12mm glass/acrylic marbles distributed precisely across 7 distinct colors (24 marbles per loop). The core engineering implements a dual-layered central axis, allowing the two main segments of the puzzle to shift and lock into 10 separate indexing states. By rotating the body and sliding the marbles through the shared intersection zones, you scramble the patterns across paths. Your goal is to restore order and re-sort all 7 color groups.

Molded with a tactile, low-friction finish, this boutique mod is built with optimized internal track tolerances to prevent binding, catching, or friction locks. Strategically embedded positioning pins and high-strength magnets ensure a crisp, tactile click and flawless track alignment with every single movement.

🧩 Key Mechanical Features

Oskar-Inspired Heritage: Built upon the foundational mechanics of Oskar van Deventer's 3-Loop design, expanding it to a 5-loop matrix for exponential difficulty.

Intersecting Multi-Loop Kinematics: Features 5 interwoven "over and under" paths that force marbles to transition across multiple circular tracks simultaneously.

10-State Indexing System: The heavy-duty shifting mechanism clicks into 10 distinct geometric holds, changing how the pathways connect and creating endless bandaging possibilities.

Premium Magnetic Alignment: Integrated with high-grade micro-magnets to deliver snappy, stable, and smooth tactile feedback during intensive sliding sessions.

Industrial Collector’s Aesthetic: The contrast between the premium industrial matte-grey frame and the high-gloss 12mm marbles makes it a striking display piece for any collector.

📐 Technical Specifications

Designer / Manufacturer: Gao
Design Lineage: Inspired by Oskar van Deventer's 3-Loop Concept
Item Name: Over & Under 5-Loop Chain Puzzle
Mechanical Layout: Intersecting Track / Sequential Movement Puzzle
Chassis Material: High-Precision, Rigid 3D-Printed Compound (Matte Grey)
Marble Array: 120 Premium 12mm Marbles (7-Color Assortment)
Total Length: 194 mm
Net Weight: 232 g
Condition: 100% Brand New, Fully Assembled & Hand-Tuned

⚠️ Custom Boutique Production Note: As an elite custom-modified puzzle, each unit requires individual precision hand-assembly, detailed magnet calibration, and rigorous track testing by the designer. The standard processing time takes approximately 1–2 weeks before dispatch. We appreciate your patience in securing this exquisite piece of custom puzzle craftsmanship.