What about the keys for duel combat? I can't figure out which keys I'm supposed to use for those.
In duels you move, parry and attack with the cursor keys: left, right, up, down
To enter parry mode, hold the Backspace key.
Now pressing left or right yields a parrying position in this direction.
To enter attack mode, hold the Return key.
Tree basic options to strike:
1. Basic strike: Press either left, right, upper left, up or upper right
2. Swinging horizontal: Strike out by pressing left or right and swing the sword by pressing the opposite direction.
3. Force a powerful hack, that can't be parried. Strike out as far as possible, by pressing and holding either lower left, down or lower right. Then hack by releasing the strike out key or by pressing one of the up keys (upper left, up, upper right). It's a slow technique, that leaves you vulnerable during the strike out phase.
Tip: You can try to lure your opponent within your reach, while waiting in a position for a powerful hack. Lift the sword on the side from where the opponent approaches to reach him as soon as possible. Once he's near enough, just release the strike out key to hack down. Be careful, when you've missed, as the opponent is now in range to strike himself.
Hitting the Spacebar pauses/resumes a duel.