E41

Nimzo-Indian Defense: Rubinstein System

Key moves: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3

The Rubinstein System (4.e3) is the most solid approach to the Nimzo-Indian. White accepts the potential doubled pawns in exchange for the bishop pair and solid development.

History & Notable Players

One of the most important variations in chess theory. The Hübner, Fischer, and Keres variations all arise from this move order.