**Spoiler** Plot Inconsistencies
I loved the performances in the film, but some of the 'logic' in it just didn't match the performances:
1. Why, when Luzhin was abandoned in the country, didn't an investigation ensue that eventually linked that to Valentinov?
2. Why, when Luzhin was "seen off" to be married, was he not accompanied by someone (both because of the previous country abandonment incident, and because of Luzhin's fragile state of mind)?
3. Why was there only one game played to decide the World Champion, when there are actually many that are played to determine that final result? The "London" rules in effect at the time of the movie required at least 6 wins to determine World Champion (see http://en.wikipedia.org/wiki/World_Chess_Championship).