1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. d2d4  3... c5d4  4. f3d4  4... b8c6  5. b1c3  5... d8c7  6. c3b5 [%c_effect b5;square;b5;type;Interesting;persistent;true] As far as I know, this is the first time that Vachier-Lagrave has played this move, a recent attempt with few games yet, at least compared to the huge theory that exists in the Taimanov Variation. Firouzja, on the other had, faced this move in the Candidates Tournament.