An early Bg4 leads to a hard to defend Position

A very strong chess player from the country of Chile missed, a relatively easy tactical shot that would have given him a substantive initiative. DvonDessauer84, whose ICC name suggest a German military hero or strategist, may have been stressed about the worldwide social distancing imposed by COVID-19 when he missed a move that would have been followed by a pawn fork of two minor pieces.

Chilean lovers of chess are frequently aggressive always seeking forcing, initiative seizing move orders. In the diagrammed position, the weaker American player appears to have a quite comfortable, if not winning advantage. Both the a7 and c6 Black pawns are anemic and it appears White can leisurely double his Rooks on the  a-file for a stress free win. See if you can find the move that turns the advantage back in Black's favor.

BTW, this position arose from a double queen pawn game where the Chilean Jugadore prematurely played Bg4 leaving his b7 pawn weak and unprotected. Qb3 often punishes such immature development. Note the b7 square is vacant  in the diagram!! Be patient before your scroll down to find the saving move.

DID YOU FIND the move Ndexc5 ?