Nimzovich and the Nimzo-Larsen Attack
The move 1.b3 is known as Larsen's Opening, or sometimes called the Nimzo-Larsen Opening. That's because Aron Nimzovich played it through transpostion. He would play 1.Nf3, then 2.b3. Here is an example of one of his earlier games with that theme. It is one of the first hypermodern games, where the player controls the center by fianchettoeing his Bishop. Nimzovich finds a way to weaken the enemy kingside while controlling the center and keeping his pieces mobile. The game was played at Baden-Baden, with every top player in the world except Capablanca and Lasker (both wanted too much appearance fees). It was the first major international tournament after World War I and was organized by Tarrasch. The event was won by Alekhine.