All the cool kids are doing it! Watching IM Daniel Rensch's Pawn Structure 101 video series that is! Apparently, playing a4 to prevent black's b5 pawn expansion is also something the "cool kids" are doing, and in this game, former World Champion Smyslov leads the way! Learn when white's g4 expansion can back fire in the second game, and stick around for Danny's summary of what you've learned so far...