Xago

Xago is a game for two people with rules a five year old can learn, but the strategic depth to challenge the brainiest of adults. Prove it? OK, here are the rules: Triangles touch triangles and blanks touch blanks. You get a point everywhere two of your triangles touch. New tiles must go on the outside. If a tile is surrounded on all six sides, it pops out and returns to its owner. The game ends when someone can’t play their turn. Whoever has the most points wins! —description from the designer