How to win Diety difficulty in 3-4 turns... Works 99% of the time

Step 1: Choose Shoshone
Step numero too: Pick duel map
Step trei: Put your enemy as Venice
Step neli: Set the round limit to 3 or 4 turns
Step wǔ: set the start era to "Information Era"
Step seis: Play the game, settle your cities, build some buildings
and finally the final step: Win

Hope this helps :D