This contest is part of 2021 World Sudoku + Puzzle Convention. Details here.
The official period for "King of Kakuro" is over. However, you can participate unofficially using this link.
Your timer will start when you click "Start King of Kakuro" — then you will have 77 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.