Today GM Melik Khachiyan begins a new videos series designed to show examples of exceptional, and sometimes not-so-exceptional, pawn play in chess. We start with a classic battle between Botvinnik and Keres in which the former World Champion "pioneers" the idea of the f3-e4 breakthrough in the Carlsbad pawn structure. Though black eventually trades the dark-squared Bishop, his passive play is punished harshly!