This "one-ton electric brain" challenges players to the ancient Chinese game of "nim." After a user turns off a chosen number of lights from the first row, the machine turns out its own choice of lamps. The player to extinguish the last light wins. According to the article, the only way to beat the game is to call upon the "powers of two of the binary system of numbers." If defeated, the machine offers up a pocket token as a reward to the clever victor.
Read the full story in Playful Machine Is Hard to Beat at Own Game