4.Nf3 Romanishin
Nimzo-Indian Defence · E20 · you play Black. 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 cxd4
About the 4.Nf3 Romanishin
4.Nf3 and g3 is the Romanishin System. Black plays ...c5, ...cxd4 and ...d5, opens the position and develops quickly. The g2 bishop is White's main asset, so Black fights for the long diagonal.
The 4.Nf3 Romanishin (E20) is one of 3 lines of the Nimzo-Indian Defence you can train here as Black. It starts with 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5. You study the moves first and then play them against the computer; every wrong move gets a short explanation. After the opening, the page shows the typical middlegame plans, the endgames that often follow and grandmaster games with the 4.Nf3 Romanishin. Use it to build your Black repertoire, and test what you remember with speed training or the random-position drill.