[%c_effect b6;square;b6;type;GreatFind;persistent;true] Black prepares to double rooks on the important open file.
1. g1f3  1... d7d5  2. d2d4  2... g8f6  3. c2c4  3... e7e6  4. b1c3  4... f8b4 The Ragozin Defense has taken the place of the Queen's Indian as the top repertoire choice for anyone looking for a variation to match the Nimzo-Indian. 5. c4d5  5... e6d5  6. c1f4 One of White's many options against the Ragozin. 6... f6e4  7. a1c1  7... b8c6  8. g2g3 A rare move, with only a few games in the database. 8... c8f5 [%c_effect f5;square;f5;type;GreatFind;persistent;true] The most accurate reply, threatening to win the exchange. 9. d1a4  9... d8e7 A difficult decision as this allows White's knight to go to e5. 10. f3e5  10... e8g8  11. e5c6  11... b7c6  12. f1g2  12... e4c3  13. b2c3  13... b4a3  14. c1d1  14... a3d6 [%c_effect d6;square;d6;type;GreatFind;persistent;true] 15. f4d6  15... e7d6  16. e1g1 At first sight, it seems White should be better with a more compact pawn structure, but this is compensated by Black's control of the b-file. The bishop on f5 plays a very important role, taking the b1-square away from White's rook. 16... f8b8  17. d1d2 