1) it is very close to the standard popular chess having the simplest possible way to expand for 4 players 2) it is based on team coordination. Trying to be as simple as possible a 4 player game can be, it allows for players to make teams and challenge other teams. 3) there is also a single player version, where an extension of stockfish engine (published in GitHub) can be an unbeatable opponent even for the greatest traditional chess game players 4) possibility to solve team chess puzzles.