The Closed, Botvinnik Defense, with f4 is a variation of the Sicilian Defense, catalogued as ECO B25. The line runs 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5, reaching the position shown below after 12 half-moves.
Both sides have pawns in the centre (White on e4, Black on e5), and one pawn capture is available, so the structure has not settled yet. Development is level at two minor pieces each. It is White to move after six moves.
On the Sicilian Defense generally: The most popular and aggressive response to 1.e4. Black fights for the center asymmetrically, leading to rich tactical play.
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The Closed, Botvinnik Defense, with f4 goes 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5. It is a variation of the Sicilian Defense and is catalogued as ECO B25.
The Closed, Botvinnik Defense, with f4 is ECO B25. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Sicilian Defense.
Stockfish evaluates the position after 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5 at +0.17 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 e4, Black on e5), and one pawn capture is available, so the structure has not settled yet. Development is level at two minor pieces each. It is White to move.