The Anti-Stonewall, ...Bf5 is a variation of the Stonewall Attack, catalogued as ECO D00. The line runs 1. d4 d5 2. e3 Nf6 3. Bd3 Bf5 4. Nd2 e6 5. Ngf3 Bd6, reaching the position shown below after 10 half-moves.
Both sides have pawns in the centre (White on d4, Black on d5). Development is level at three minor pieces each. It is White to move after five 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.
You can play through this variation move by move in your browser — Learn mode walks the line with an explanation at each step, and Drill mode replays it from memory so you find out whether you actually know it. No account is required.
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The Anti-Stonewall, ...Bf5 goes 1. d4 d5 2. e3 Nf6 3. Bd3 Bf5 4. Nd2 e6 5. Ngf3 Bd6. It is a variation of the Stonewall Attack and is catalogued as ECO D00.
The Anti-Stonewall, ...Bf5 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 Bf5 4. Nd2 e6 5. Ngf3 Bd6 at -0.19 at depth 18, which is balanced. 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). Development is level at three minor pieces each. It is White to move.