Boss is a two-player chess game, played on a 8x8 checkerboard. The aim of the game is to capture all your opponent's pieces before it does the same, and moves are made by inputting two sets of grid references. There are ten levels of play, giving response times from one second to nine hours. Boss's unique feature is the ability to predict its own moves. It is also capable of castling, queening, and ‘en passant' and operates on standard chess nomenclature.