The players try to create a structure on the table as quick as possible using 13-15 hexagonal tiles each. At least 2 sides must match when adding a new tile. To make matters worse, each player can only see one of his tiles at a time. There are 72 different tiles, each with 6 different colored triangles in red, yellow, blue and white, and each color can occur up to 3 times on a tile.
If you place a tile that's adjacent to 3 other tiles, you give 2 of your tiles to the other players. If you match 4 then you give 4 tiles, and if you match 5 then you give 6 tiles. Whenever you place a tile you must say loudly the number of adjacent tiles.
When a player finishes placing the tiles, everyone stops and counts their points: tiles still in hand are negative points. The player with the fewest negative points after an agreed number of rounds wins.