Over & Under 4-loop Chain Puzzle (3D printing Mod)

Over & Under 4-Loop Chain Puzzle | Intersecting Track Sequential Puzzle by Gao

Expand your mechanical puzzle collection with the Over & Under 4-Loop Chain Puzzle, a brilliant interlocking track masterwork designed and manufactured by Gao. As a direct evolutionary step inspired by puzzle pioneer Oskar van Deventer’s legendary 3-Loop concept, this 4-loop edition strikes the ultimate balance between intuitive sliding logic and complex sequential geometry.

The puzzle features an industrial-grade, high-precision 3D-printed matte grey chassis structured around 4 continuous, intersecting circular tracks. Inside this interwoven matrix rolls a precisely calibrated array of 96 vibrant, 12mm marbles split into a multi-color spectrum (24 marbles per loop). Operating on a dual-layered shifting core, the puzzle enables you to change the pathway connections by clicking the main segments into distinct indexing holds. By weaving the marbles through the shared crossover points and rotating the body, you scramble the color sequences across all 4 loops. Your mission is to decode the tracking logic and sort every single color back into its isolated ring.

Engineered with tight internal track tolerances, this boutique mod ensures an ultra-smooth, catching-free movement. Embedded positioning pins and premium micro-magnets deliver a crisp, tactile click and flawless alignment at every turn, providing an incredibly satisfying solving experience.

🧩 Key Mechanical Features

Oskar-Inspired Heritage (Mid-Tier Challenge): Bridges the gap between Oskar's classic 3-Loop and the extreme 5-Loop matrix, serving as the perfect sweet-spot challenge for collectors.

Intersecting 4-Track Kinematics: Features 4 interwoven "over and under" circular paths that seamlessly route 96 premium marbles across different dimensional planes.

Tactile Magnetic Indexing: Outfitted with strong micro-magnets to ensure snappy, stable shifting and flawless track alignment with every rotation.

Boutique Collector’s Build: The contrast between the rugged matte-grey 3D-printed frame and the high-gloss 12mm marbles creates a striking modern aesthetic.

📐 Technical Specifications

Designer / Manufacturer: Gao
Design Lineage: Inspired by Oskar van Deventer's 3-Loop Concept
Item Name: Over & Under 4-Loop Chain Puzzle
Mechanical Layout: Intersecting Track / Sequential Movement Puzzle
Chassis Material: High-Precision, Rigid 3D-Printed Compound (Matte Grey)
Marble Array: 96 Premium 12mm Marbles (Multi-Color Assortment)
Condition: 100% Brand New, Fully Assembled & Hand-Tuned
⚠️ Custom Boutique Production Note: As an elite custom-modified puzzle, each 4-Loop 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 craftsmanship.