The app cheats!

No it does not.

First of all, the chess engine has been tested extensively for years when it was competing in official tournaments. If it was not following every rule of chess, it would have been disqualified.

Second, please think about it for a while. Why would the app cheat? It has been designed to help you improve your chess, not to try to win against you at any cost! It would not make any sense!

Third, we have noticed that a number of points in the official rules of chess are vastly misunderstood or not known at all. They are the en passant capture, the stalemate, pinned pieces and the ability to have more than one Queen.

  • The "en passant" capture is a strange move where a pawn capture another pawn located at the left or right of it, and lands on an empty square. It is a legal move and you will find it in the rules.
    En
                          passant capture example
    En passant is a retaliatory reply to the opponent's opening pawn move to the fourth row from the second row to avoid capture by the other player's pawn which has advanced to their fifth row.

    The passing pawn can be captured by the pawn next to it on the next move only in a diagonal capture on to an empty square on the board as though it was actually capturing a physical pawn.


  • A stalemate occurs when you manage to totally block your opponent. Generally he has almost no piece left, just his King and maybe a pawn or two, and he has no legal move anymore. Some people believe that they have won the game at this point, but in reality it is a DRAW! Your job is to checkmate the opponent's King, not to block it. You will find the stalemate in the built-in rules, and also here.


  • Sometimes the app will not allow you to make a move. It generally means that by moving this piece, you would leave your King exposed to a direct attack, which is not allowed (in chess, you cannot commit suicide). The piece is said to be "pinned".


  • A side is allowed to have more than one Queen. If a player has still his Queen and manage to push a pawn to promotion, then he can promote the pawn to Queen and therefore have two Queens on the board. In theory, it would be possible for a player to have up to 9 Queens on the board, by promoting all of his pawns. It does not matter that a physical chess set has only one Queen of each color. In real life, if a player needs an additional Queen he can use a small object (a lighter, a coin, a pebble or anything...) to represent a Queen so he can continue the game. When a Rook of the right color is available (because it has already been captured) it is common to use it and to put it upside down on the chessboard to represent a Queen. On a computer we do not have this problem and so we draw as many Queens as required.

When you believe the app is trying to cheat on you, please contact us. Take a picture of the current position by pressing both the "Home" button (the button that takes you back to the list of your apps) and the button located on the corner of your device (the on/off button). You will hear a distinct sound and the screen will flash.
iOS
                    screenshot procedure
This will store a snapshot of what you see on the screen into your camera roll. Then you can send us the picture by email, with your question, to support@chesstiger.com