Game lab
Challenges
A small mental gym for card fans. Every day there is a new challenge, the same for everyone, and every week another longer one. If you want more, the catalogue has series by type and difficulty.
Daily challenge
Five questions that change every day at midnight (Spanish mainland time).
Weekly challenge
Ten questions of all types, changing every Monday.
Challenge catalogue
Choose the type and level to play a series of five questions.
Everything is saved only on this device. You don't need an account and we don't send anything to any server.
FAQ
Is the daily challenge the same for everyone?
Yes. Everyone receives the same questions on the same day, so you can compare results.
Where is my progress saved?
On your device. If you clear your browser data or change mobiles, your progress will start from scratch.
Are the probability questions calculated correctly?
Yes: they are calculated automatically using the same exact formula as the probability calculator, they are never written by hand.