Quellstone: 3D Chess

Quellstone is a chess game with a three-dimensional board, made to be played with your phone upright. Play against the computer on five levels, from beginner to master, or against another person on the same device. In that mode the board turns toward whoever moves next, and you can turn this off when you are sitting face to face with the phone on the table. The chess engine and every rule were written for this game: castling, en passant, promotion, stalemate, threefold repetition and the fifty-move rule. The clock is optional and follows the FIDE Laws of Chess, including the draw when a flag falls and the opponent has no material to give checkmate. After the game • Analyze the finished game: every move gets a classification, with the best move when there was a mistake and an evaluation bar. • Review any move by tapping it in the move list. • Copy the game as PGN to study it in another program. • Follow your statistics: results with each color, most played openings, fastest checkmate and average time per move. Your way • Tap and tap, or drag and drop. • Move confirmation, if you worry about mistaps. • Undo move. • Five board colors, high contrast and a left-handed layout. • Six languages: Portuguese, English, Spanish, German, French and Italian. Plays without internet, with no ads and no sign-up. The game only talks to Google Play, to check and make purchases. The chess game is complete and free. The shop has Army mode, where the pieces become characters that run and fight, with three free games before the one-time purchase, and tips for anyone who wants to support the game. Your games stay on your device.