Spandrel is derived from Spaiji, and is a three-player game designed for play with a Shibumi set. It uses a 4×4-holed board, and balls in three colors (white, black, and red).
Rules: The 4×4 board starts empty. The players, White, Black, and Red, take turns placing one ball of each color (yes, all three colors) in a contiguous, touching chain on the growing pyramid. The balls can be placed on board holes and/or on top of 2×2 platforms. The three balls can go on the growing pyramid in any orientation, as long as one of the three balls touches the two others.
Aim: The player with the largest group of connected balls of her color when the pyramid is full wins. In case of a tie, the last player in turn order wins (i.e. Red beats Black beats White in a tie).