The terms of the Treaty of Riga were nominally a victory for Poland — the treaty had seen the borders of the Republic extended, and Soviet reparations secured.
In reality, though, Poland was saddled with an indefensible eastern frontier and a sizable new population of non-Poles. Many Poles viewed the treaty as a failure for Poland.
Your challenge, should you choose to accept it, is to devise better peace terms for Poland, such that the long-term national security and territorial integrity of Poland are secured — at least as far as the east is concerned.