The Richter-Rauzer Variation, Classical Variation is a variation of the Sicilian Defense, catalogued as ECO B64. The line runs 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4, reaching the position shown below after 17 half-moves.
White holds the centre with pawns on e4. Development is level at three minor pieces each. It is Black to move after nine moves. The kings have gone to opposite wings (White queenside, Black kingside), which usually means both sides attack with pawns and the faster attack wins.
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 Richter-Rauzer Variation, Classical Variation goes 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4. It is a variation of the Sicilian Defense and is catalogued as ECO B64.
The Richter-Rauzer Variation, Classical Variation is ECO B64. 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. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4 at +0.46 at depth 18, which is a slight pull for White, 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.
White holds the centre with pawns on e4. Development is level at three minor pieces each. It is Black to move. The kings have gone to opposite wings (White queenside, Black kingside), which usually means both sides attack with pawns and the faster attack wins.