Marienbad System position after 1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5. White: pawn on d4, knight on f3, pawn on g3, pawn on a2, pawn on b2, pawn on c2, pawn on e2, pawn on f2, bishop on g2, pawn on h2, rook on a1, knight on b1, bishop on c1, queen on d1, king on e1, rook on h1. Black: rook on a8, knight on b8, queen on d8, king on e8, bishop on f8, rook on h8, pawn on a7, bishop on b7, pawn on d7, pawn on e7, pawn on f7, pawn on g7, pawn on h7, pawn on b6, knight on f6, pawn on c5.
Marienbad System is a chess opening that arises after 1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5. It is classified A47 in the ECO system, and the position after these moves has white to move.
Variations continuing from this position
Each of these is a named opening reached by playing on from 1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5. Open any of them to load the position on the board.