Lumen

In Lumen, players only see the back of their own hand of cards, which are handed to them by the person to their right, sorted by color and number in ascending order, but upside down. So the color values of their own cards are known, but the numerical values can only be guessed, while all opponent's hand cards are visible. Based on this information, players must now estimate how many tricks can be successfully won. Colorful glass beads not only help to visualize their estimate, but also determine the scoring at the end of the game. But beware, tricks that exceed the previously estimated number give negative points.