Correction: John is watching the match with his friend Charlie. John knows K, but Charlie knows nothing about the course of the match. Unfortunately, as soon as John can predict the outcome of an upcoming game, he blurts out "I know who wins the next game" and tells Charlie the value of K. What is the expected number of interesting games from Charlie's point of view.

The examples in the statement are consistent with this correction.

The contest will be extended by 30 minutes.