What is the Watermelon Chess on line game, how does it work?

According to the introduction of GreenHill, Watermelon Chess on line is a Trivia game on the Android platform. There is currently a 2017.02 version released on Feb 08, 2017, you can see the details below.

Watermelon Chess has new features including "Google Play Game Service" compete (random pairing), friend private play room, leader board, chessboard style choice.

Description:
Watermelon Chess is a two-player game from China where it is so called Xi-Gua-Qi. It is like as simple Go(weiqi). The difference is that in Watermelon Chess each player has six pieces. Watermelon Chess is played on a board that vaguely resembles a watermelon. The object is to capture the opponent's pieces by immobilization. Each player starts with six pieces and moves them from intersection to intersection on the board. If you succeed in surrounding an opponent's piece with your own pieces, it is removed from the board. The winner is the player who reduces his opponent to less than two pieces.

Watermelon Chess has new features including WiFi internet compete (random pairing), friend private play room, leaderboard, chessboard choice.

What's new in version 2017.02 Watermelon Chess has new features including "Google Play Game Service" compete (random pairing), friend private play room, leader board, chessboard style choice.
Two different preset levels for computer AI.
Play with human friend option is provided.
Provide with undo button to train your thinking.