Another puzzle from the Portuguese magazine collection, the Sequential Cube (a.k.a. The Clive Cube) is an interlocking puzzle. Like every other puzzle in this category, the secret to solve this puzzle is to find the "secret key" to take it apart. It was presented by Simon Nightingale at the 17th IPP (International Puzzle Party).

Similar to the Column Cube, the Sequential Cube presents a deeper challenge. Unlike the first one, where you see how each column is interlocked with one another, here you have to figure out another way to separate the pieces from the puzzle. It's also not that trivial, because there's not a single column that simply slides out.

The second challenge, of course is to put the puzzle back together in its original position. Again, not so easy when you can't see what's happening inside the cube.