- → (Ctrl+Z)
Undo a previous move, repeatedly if required. Note: It is possible to undo the closing moves of a completed game and investigate alternative endings.
- → (Ctrl+Shift+Z)
Redo a move that was undone, repeatedly if required.
- → (H)
Get a hint as to the best move to make next. The hint is calculated by computer player 1 or 2, depending on whether you are human player 1 or 2. See the Game Configuration section for more details.