micartouse: An interesting game from Alekhine's early days. It features sharp play from beginning to end.5. e5?! is a bluff, and Alekhine himself admitted it is pretty much useless. The pawn should have been captured.
12. Nf3! is a subtle defensive move containing a fierce tactic. If 12 ... Bc5+ 13. Kh1 Nf2+?, then 14. Rxf2 Qxf2 15. Ne4 captures the queen!
During moves 21-25, Alekhine tries to consolidate his advantage with the help of tricks. White lures Black's rooks off the back rank and plays combinations on this theme.
The 2 knights v. rook ending is subtle, and perhaps not enough to win. Both players made mistakes. 41. Ncd2? allows Black to win one of the knights with the passed pawn. It looks bad, but in fact Alekhine thought he was playing for a win until he noticed the intermezzo 44 ... Rd1+! Black plays even worse with 47 ... Kc6? rather than moving the king to the obvious c4 square. White ends up in a commanding position despite being down the exchange and quickly wins.
sac: 30.Rxg8+
c4 was the correct move, playing actively with the King, eg 48. c6 
a3 49. 
e4 