Patio Block - Interlocking puzzle by Stewart Coffin (STC #82)

## ## Patio Block

### Interlocking puzzle by Stewart Coffin (STC #82)

Assemble the eight pieces into a 4x4x4 cube.

_Patio Block_ is classic Stewart Coffin: a simple, elegant idea gives rise to an unexpectedly challenging assembly puzzle. Coffin wrote of the ideas behind its design:

"Start by joining 1x2x2 blocks all ten possible ways. Now put aside the two that are rectangular solids. Try fitting the other eight into a 4x4x4 box until you become convinced that it is impossible. Try e