Co Up - Co Tuong Up, also known as Dark Chess, is a game for Android users who are fans of Chinese chess and want to experience it in a new way. In this Xiangqi variant from Vietnam, all pieces except Generals start flipped down and are flipped up randomly in the first move. From then on, the game is played like traditional Chinese chess, with hidden pieces acting like the pieces in their original positions. This game promises a lot of surprises when you flip up the pieces.

Co Up - Co Tuong Up features a smart algorithm in the chess engine and nice graphics. It offers two play modes: versus computer and two players. The game is free and available for download on Google Play.

Overall, Co Up - Co Tuong Up is an exciting and refreshing take on Chinese chess that offers a new and challenging experience for players.