Richter-Rauzer Variation

The Richter-Rauzer Variation (also spelled Richter-Rauser) is White's answer to the Classical Sicilian. It arises after 5...Nc6 and can also be reached through the 2...Nc6 move order. In the Classical, Black usually aims for ...e5 or ...g6. The bishop on g5 pins the f6-knight and makes both plans less attractive without forbidding them. An immediate 6...e5 fails to 7. Bxf6, which ruins Black's structure or leaves the c7-square weak, and ...g6 loosens the knight's protection. The usual reply is 6...e6. After 7. Qd2, the Traditional Variation, White often castles queenside. Black then chooses between 7...Be7, the Classical Variation, which can lead to the Rauzer Attack with 8. O-O-O O-O 9. f4 Nxd4, and 7...a6 8. O-O-O Bd7, the Neo-Modern. Black's other seventh-move options include 7...Qb6, the Ivanov. White can also deviate with 7. Bb5, 7. Nxc6 or 7. Nb3. On move six, Black's alternatives are 6...Bd7, the Modern Variation, which scores slightly better for Black, and 6...g6, a Dragon setup. The engine gives White a slight edge, but practical results are close to even.