Buy at your own risk. Check vs Mate offers a profoundly confused game concept utilizing shoddy storytelling and nonsensical game modes to advance a single gimmick, chess as warfare. Punishing optimism with an exposition that even fails to accidentally tell a story. Without an active online community of players, narrative, or strong chess engine Check vs Mate cannot compete with free alternatives. Chess.com,
Chesscube, Chess24, Redhotpawn and ICC are all better for straight up chess. Or if you want a twist: Chessmaster, Fritz, Rybka, Blitzin, Dasher(Stockfish/Fruit/Shredder/Crafty) and Battle Chess offer coherent chess variants. Check vs Mate is lost somewhere between a wheel spinning exercise in self deception and a text to speech app bugging on the phrase "Slow Children at Play".