1. The game consists of solving of arithmetical problem cards.
2. Problem cards consist of several problems and have different levels of difficulty. The first level can be solved by everyone, and the last one is the most difficult.
3. Throughout the game, players pick cards of any difficulty level, solve them, and the system checks the answers.
4. If answers are correct, a player receives points named 'olimpcoins', and picks the next card to solve.
5. If some of the entered answers are incorrect, no olimpcoins are gained, and the player has to pick another card.
6. If a card is too difficult, boring, or a player just doesn't like it, they can change it at any moment of the game.