RicardoRix wrote:How can people cheat exactly?
This is a game of hidden information that was once public. While nobody is allowed to see the cards you currently have in your hand, they saw each time that you took a card and what it was. In a live game, it is up to the opponent to remember this information. If it was in the log, they would simply be able to scroll through the log to determine the information. I have heard of situations in Hearts where people have gone through the log to determine the value of cards remaining in opponent's hands.
This information is valuable to determine what your next play might be. For example, if you have 6 of one card and 1 of another, you are much more likely to make a move that increases the value of the first cards.
[[Note -- it has been a while since I've played this game, my examples of number of cards may not be accurate.]]
I know Jaipur gets around this problem by only listing what cards were taken on the last move, but I'm not sure if that solution can extend to a game with more than two players.