PinChess : Chess Tactic Puzzles

PinChess is an online chess tactic server. The problems are at all difficulty levels from beginner to master. All puzzles are taken from real games, and we are generating more tactic puzzles daily. GOAL : In each puzzle find the best move that leads to at least 2 pawns worth of material advantage (In terms of the chess engine, the best move requires at least 200 centipawn advantage). For every position, there is only one solution. But some tactics may need more moves to complete because of tricky moves that the user should be able to handle and complete the puzzle successfully. RATING : The rating system that is using for calculating users and tactics rating is Glicko. For the new users, the amount of rating change is high, but it will be lower when the user solved more tactics. To get the rating and use other statistic information, users must sign in. You can sign in with your Google account or other email providers. SOME FEATURES : - See your live ranking among all players - Get more difficult tactics as your rating increased - Some info about the game that the puzzle is taken from - See top players by connecting to Google Play Games - Embedded Stockfish chess engine for analyzing positions - Support phones and tablets