XBoard is a graphical user interface (GUI) for playing chess games against other players or chess engines. It provides a convenient platform for playing, analysing, and studying chess games. 

Yes, XBoard is free and open-source software. It can be downloaded and used without any cost. 

XBoard is available for multiple platforms, including Linux, macOS, and Windows. It is a cross-platform application, making it accessible to a wide range of users. 

Yes, XBoard supports playing against chess engines. It can interface with various chess engines such as Stockfish, GNU Chess, and Crafty, allowing you to challenge computer opponents of different skill levels. 

Yes, XBoard provides features for analysing chess games and positions. You can load game files, replay moves, analyse positions with chess engines, and view detailed evaluations and variations. 

Yes, XBoard allows customization of the chess board and pieces. You can choose different board and piece themes, adjust colours, and personalize the visual appearance according to your preferences. 

XBoard primarily focuses on local play against chess engines or other players using the same computer. For online play, you may use XBoard in conjunction with chess server clients like WinBoard or other compatible interfaces. 

To make a move, click on the piece you want to move and then click on the destination square. Alternatively, you can use the algebraic notation to enter moves directly (e.g., e2-e4 for moving a pawn from e2 to e4). 

Yes, XBoard supports taking back moves or undoing actions during a game. Use the “Edit” menu and select “Take Back Move” or use the shortcut (usually Ctrl+Z) to undo the last move. 

To start a new game in XBoard, go to the “Game” menu and select “New Game.” You can then choose the type of game (e.g., Human vs. Engine, Human vs. Human) and set up the board for the new game.