"21 Nim" is a version of Nim, the classic mathematical strategy game where two players take turns removing objects from distinct heaps. <br/><br/>In this version of the game, there is a heap with 21 stones. You and Alexa take turns removing one, two, or three stones. The one to remove the last stone loses the game.<br/><br/>To start playing just say, "Alexa, launch 21 Nim."
June 7th 2017