There is a long-lived fly fluttering somewhere out there. Some say this fly is able to perform additions and substractions. Quite an amazing diptera, right?
Well, there are 7 friends who would disagree with us. During their 4 chess games, this house-fly would land (randomly, they thought) on some very specific chess squares. Games are enumerated from 1 (first) to 4 (last):
Now it is thought this diptera is smarter than suspected. It is following a pattern! You need to help these friends guess in what square it is going to land next, so they can finally put an end to its cockiness - swatting it hard!
Rolled newspapers ready; this is the game:
Can you help them identify the square the fly will touch down next?
This fly knows the time.
This fly knows the name of each and every one of the 7 players.
This fly has a curious habit: it lands on the board only after one of the players surrenders. Some calculations after that, the diptera chooses the square.
Mind the 'Knowledge' tag.