- → (Ctrl+Z)
Undo the last move. If the previous player is played by the computer two moves are taken back so that it is the player's turn again.
- → (Ctrl+Shift+Z)
Replay a move which had been undone. If one of the players is played by the computer two moves are redone so that it is the player's turn again.
- → (H)
The computer will calculate the best possible move for you and mark it with a sign on the game board. How good the move actually is depends on the level of the computer.