Chess doesn't provide answers, it only presents problems.
Much of chess is pattern recognition, however there are too many possible variations on every move to make a game predictable thereby every game presents its own set of problems needing to be solved in order to win.
Mistakes are due to a lack of attention and 100% avoidable.
Tournament Entry Rating is calculated by the formula (CurrentRating + HighestRating) / 2. The entry rating will never drop to more than 100 points below your Highest Rating.
Rated stats are updated within 24 hours of the last completed rated game.