Imperfect Information Games (Limited Information, Hidden Information)

Assembly (Saturday Review)

After the Kickstarter campaign for Assembly by Wren Games finished successfully back in June, the game is now close to being sent out to backers. So it is time to have a closer look at this fun, co-operative card game. The game can be played solo, which is also possible using an app, or in a two player co-operative setup. The aim is to manoeuvre a set of tokens along a randomly configured circle of locations into their correct slots by playing cards that allow you to rotate, swap and lock these tokens in place. To do this efficiently you need to play cards that your team mate can match with a card in their hand – but the problem is that you don’t know what cards they have.


Guess who

Imperfect information games have been around for a long time. Games like Cluedo or Guess Who? are examples that most people will know and have probably played. In these games you all have the same goal, but everyone has a different set of information, and nobody has the full picture. These type of games create an interesting puzzle for players who try to win without revealing too much information to their opponents. It is often impossible to know which of the possible actions is the best one, and whether it will give others an advantage. A whole branch of game theory is dedicated to solving imperfect information games, but in this blog post I want to describe a couple of games that have built on the basic premise of these type of games and developed it further.