When is it optimal play to open Duchy-X in your first two buys? feel free to be as creative as you'd like within the confines of a 4 player game
My solution:
Deck: Embargo, Duchess, Vineyards, Golem, Bank, Outpost, Saboteur, Noble Brigand, Gardens, Silk Road
4P game, you're P4. You, P2, P3 have 2-5, P1 has 4-3
P1 buys Noble Brigand
P2/P3 buy embargo
You buy Duchess or Embargo
P1 buys silver
P2/3 Embargo silver and Noble Brigand, buying Saboteur
You buy duchy: Now it can get saboteured into a silver with any luck, and you gain duchess.