♟️ The game of Penultima [members & +1s]

​https://en.wikipedia.org/wiki/Penultima
https://boardgamegeek.com/boardgame/118656/penultima

​The gist of the game is that “observer-players” invent the rules (which stay secret for the duration of the game) on how each piece moves (can be pretty much anything) and the two “action-players”  need to figure out how the rules work and win against the other “action-player”