Puzzle: Cast Quartet Difficulty 6/6

Hanayama puzzles combine brain-teasing challenges with elegant design. Each metal puzzle features a different mechanism that puts your logic and patience to the test.

With its four tightly interlocking pieces, Cast Quartet seems to form a bond that cannot be broken. Examine their arrangement and explore their movements to discover how to separate them, then restore their original configuration. There are two ways to approach this challenge: can you discover both?