Two dwarves draw three lines equally spaced, then step to face each other across the middle line. The dwarves then try to face each other down.
Double the Con, Cha, and Wis bonuses or penalties. Each round, each dwarf picks one and rolls 1d20, adding it to the modifier. You cannot repeat a modifier until all the others have been exhausted. Each victory moves the victor closer and the loser five feet by the amount by which you won.
When the loser crosses the line behind them, they must yield or be shunned.
Non-dwarves make all rolls at a -4 penalty.