Constrained 90 Puzzle - Difficulty Level 9/10

At first glance, this appears to be a standard 3×3 cube, but it hides a clever twist: each face is constrained to rotate only in 90° increments.

This restriction transforms every algorithm you know into a fresh challenge. Solving it demands both classic cubing skills and a new level of planning and adaptability.

Key Features:

• Classic 3×3 form factor with constrained turns

• Requires rethink of algorithms and methods

• Durable construction and reliable turning

• Ideal for cube enthusiasts looking for a twist on the familiar