A Russia win means Russia takes at least 50% of Ukraine,  puts crippling (at least 3x GDP) of war debt on the country, or verifiably establishes the state as a puppet.  A Russia Partial win means Russia takes at least 3% of Ukraine.  A Ukraine win means less than 3% of Ukraine is taken by Russia.  Ukraine takes land means that Ukraine ends the war with at least 3% more land than it started with (such as a partial Crimea retake).  Russia nukes Ukraine is self explanitory.  The world ends means at least 50% of the earth's population dies from nuclear fallout.