Sometimes the program should be a bit more talkative, assuming the player doesn't look at the screen.
In case there is an error message or the game is interrupted, it should be told to the player
If the opponent's move couldn't be recognized, the expected move should be said aloud again (in case the player didn't hear or misunderstood it for any reason)
Sometimes the program should be a bit more talkative, assuming the player doesn't look at the screen.