The with Bd3 and Nd2 is a variation of the Stonewall Attack, catalogued as ECO D00. The line runs 1. d4 d5 2. e3 Nf6 3. Bd3 e6 4. Nd2 c5 5. c3 Nc6 6. f4, reaching the position shown below after 11 half-moves.
Both sides have pawns in the centre (White on d4, Black on d5), and one pawn capture is available, so the structure has not settled yet. Development is level at two minor pieces each. It is Black to move after six moves.
On the Stonewall Attack generally: White builds a solid pawn wall on d4-e3-f4-c3 with the bishop on d3. A straightforward attacking system aimed at the kingside.
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The with Bd3 and Nd2 goes 1. d4 d5 2. e3 Nf6 3. Bd3 e6 4. Nd2 c5 5. c3 Nc6 6. f4. It is a variation of the Stonewall Attack and is catalogued as ECO D00.
The with Bd3 and Nd2 is ECO D00. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Stonewall Attack.
Stockfish evaluates the position after 1. d4 d5 2. e3 Nf6 3. Bd3 e6 4. Nd2 c5 5. c3 Nc6 6. f4 at -0.43 at depth 18, which is a slight pull for Black, within normal opening margins. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
Both sides have pawns in the centre (White on d4, Black on d5), and one pawn capture is available, so the structure has not settled yet. Development is level at two minor pieces each. It is Black to move.