Like Arimaa, some other games were (at least partially) designed to be hard for computers: Havannah [1] and Octi [2]. Havannah has since been defeated by the

Like Arimaa, some other games were (at least partially) designed to be hard for computers: Havannah [1] and Octi [2]. Havannah has since been defeated by the machines. Octi remains unchallenged, but that is probably due to its obscurity. [1]. https://en.wikipedia.org/wiki/Havannah#Computer_Havannah https://en.wikipedia.org/wiki/Havannah#Computer_Havannah [2]. https://news.yale.edu/1999/06/01/successor-chess-new-game-strategy-be-demonstrated-yale-june-11 https://news.yale.edu/1999/06/01/successor-chess-new-game-st...