Crazyhouse is a variation of chess where captured opponent's pieces change color and can be returned to the board by you as your own pieces. On your turn, instead of a normal move, you can place any piece from the reserve on any empty square of the board (except pawns on the first and eighth ranks). All other rules of classic chess remain unchanged, including castling, en passant capture, and the rules for promoting pawns.
To play online with real players, as well as online bots, go to the "tables" tab, select a table that suits your parameters and join the game. You can also create your own gaming table with the desired settings by clicking the "create game" button. In training mode, you can play offline with yourself or with the computer. The more time you give the artificial intelligence to think, the better it will play. In addition, if the game is new to you and you want to understand what strategy and tactics to follow, you can choose a CPU vs. CPU game and watch the process.
If it is obvious to you what your opponent should do next, and you already have an answer, you can, on your opponent's turn, continue the game by making moves for both your opponent and yourself to an unlimited depth. As long as your opponent's actual moves coincide with those you made on the board, your moves will be executed instantly without losing time. If you also predicted the subsequent moves correctly, they will also be executed instantly. If your opponent's move differs from the predicted one, the position will be updated, and you will simply continue the game as usual. To cancel planned moves, simply click on an empty space on the board, or make an illegal move.