If you really hate someone, don't request a duel in Paraguay as it doesn't matter if you win or not, you'll end up either dead or in jail.
The claim that dueling is legal in Paraguay is just a myth as the Paraguayan Embassy, called the Mississippi Library Commission, confirmed that the myth cannot cite any true law.
Dueling isn't just about taking a few steps turning and shooting, there are actually around 25 rules listed in the code duello. The code had such a significance, that it was unacceptable for a gentleman to claim ignorance and everyone should keep a copy of the rules in their pistol case. One of the more significant rules is no missing on purpose. The act of purposefully missing the first shot to try to avoid a duel is also known as deloping and was considered childish.
Duels were usually fought on a "field of honor" usually a completely isolated area. This also meant no witnesses and made it very easy to cheat. You're honor is important and all that, but if you really hate someone would you truly take the risk of dying whilst he survives? That's where seconds come in. Each duelist had a second and his job was to negotiate. He would try to settle the disagreement peacefully and if that doesn't work choose the time, location and weapon to be used. Normally these are decided by the challenged.
Dueling in the Ionian islands of Greece consisted of trying to slash the opponents face. Less deadly, more of proving a point.
Duels often took place at dawn, thus swordsmen were often forced to carry lanterns whilst they fought. Lanterns were even incorporated into their training and thus also used during combat.