Quarto Board Game

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Quarto is a board game designed specifically for two players by Swiss mathematician Blaise Müller back in 1991. The game unfolds on a 4x4 grid. A total of 16 unique pieces make up the game, each boasting its own distinct characteristics: they can be tall or short, red or blue (or other contrasting hues), square or circular, and hollow-top or solid-top. Players take turns selecting a piece that their opponent must then place on the board. Victory is achieved when a player successfully places a piece that forms a horizontal, vertical, or diagonal row of four pieces, all sharing a common trait (all short, all circular, etc.). A secondary winning condition included in many versions allows players to win by placing four matching pieces within a 2x2 square.