1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3 dxc4 5.Bg2 Bb4+ 6.Bd2 c5
The idea of using ...c5 to protect the Bb4 comes from Alvins Vitolins and was first employed in the Bogo-Indian. Its transfer to the Catalan is still quite new, but so far has worked well. In principle White should carry on and capture on b4.
(Language: German and English) 6 commented games (Language: English)