It's fun and was worth buying, but I'm pretty sure it's 4D. In the in game manual, it even says that there is an unused spacial dimension in the in-game rulebook.
First, you have the 2 dimensions that pieces can move in in regular chess. The third dimension is the fact that pieces can move back in time a certain amount of boards depending on the move, creating a different timeline. The fourth dimension is how pieces can move into different timelines using one their movement dimensions.
First, you have the 2 dimensions that pieces can move in in regular chess. The third dimension is the fact that pieces can move back in time a certain amount of boards depending on the move, creating a different timeline. The fourth dimension is how pieces can move into different timelines using one their movement dimensions.