Invitational Contest Results are out! Click here to view them.
Discuss the Invitational Round problems on this AoPS forum
If you enjoyed this competition, check out the Online Physics Brawl, a three-hour long online team competition happening in November!
View the invitational round rankings.
View the open round rankings and awardees
View the invitational round contest paper
View the open round contest paper
Click here for general info about OPhO!
Meet the team who made OPhO possible!