​Calvin's Puzzle TomZ Constrained Cube Ultimate Black (Mixed Constraints: 0°, 90°, 180°, and Free Turn)

TomZ Constrained Cube Ultimate is the crown jewel of the renowned Constrained Cube series, designed by the legendary puzzle creator Tom van der Zanden (TomZ). This ultimate edition combines several of the restrictive mechanisms that make the series so challenging, creating a hybrid cube where each side can have different rotation limitations. Some faces can only turn 90 degrees, others 180 degrees, while some may be fully locked or freely rotating. This variation not only requires advanced solving strategies but also the ability to analyze and adapt on the fly, as the shifting constraints constantly challenge your algorithms. A true collector’s gem and a mechanical masterpiece for those who love pushing the boundaries of classic cubing.