Exclusively for Zillions, TriChess is a new chess variant on a hexagonal board of 61 hex cells or a larger board of 91 hex cells. Three sides can play, with 11 pieces each on the standard board or 15 pieces each on the larger board.
Many thanks to J. Mark Thompson for the graphics from Glinski-HexChess and also to Peter Winkler for encouraging me to develop these games for Zillions -- 40 years after my first version of HexaChess!