Online solving using Penpa is enabled in this contest. Make sure to read the F.A.Q. on online solving before starting the contest.
Supported browsers : Latest versions of Google Chrome, Microsoft Edge, Opera. At this point, we do not support Firefox.
Indian participants must start the round between 12/19/2021 12:05:00 PM and 12/19/2021 12:20:00 PM to be considered for official rankings.
The official period for "IPC Finals 2021 - Round 3 - Think Different" is over. However, you can participate unofficially using this link.
Your timer will start when you click "Start IPC Finals 2021 - Round 3 - Think Different" — then you will have 80 minutes to solve and submit your answers.
A timer will be shown the answer page with the remaining time.
If you have any questions or doubts or suggestions, please ask in the forum.