
How to get rid of the annoying pin: with 70.Nxf7 or with 70.Rxg5+.
Note that in the replay windows below you can click on the notation or use the cursor keys to follow the game.
After the opening, middlegame and endgame when both sides queen the fourth phase of the game starts. Alekhine had several instructive examples. The side which can give the first check usually wins resp the side with the safer king: