Interplay

The game is a Go-Moku elaboration; players must get five pieces in a row. However, there are narrow pieces and wide pieces, and winning requires making one of three patterns (e.g., N-W-N-W-N).
There are three different types of pieces: a narrow cylinder, a wide cylinder, and a wide tube. The narrow cylinder will fit inside the wide tube, and so those two pieces can share the same space - but only if they belong to opposite players.
Pieces may also be moved, once there are no more new ones to be placed.