[Event "King's Indian: Petrosian Variation"] [Site "https://lichess.org/study/DkImmch8/PNRTaa4l"] [Result "*"] [UTCDate "2018.12.22"] [UTCTime "10:21:50"] [Variant "Standard"] [ECO "E94"] [Opening "King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line"] [Annotator "https://lichess.org/@/SoftwareChess"] [Source "https://lichess.org/study/DkImmch8/PNRTaa4l"] [Orientation "white"] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Nbd7 7. O-O e5 8. d5! { positionally this is the best move: why should white not take more space with a solid center, making at the same time Bg7 very passive? Strategically, however, black has some ways to get good pieces play. } 8... Nc5 9. Qc2 (9. Bg5?! h6 10. Bxf6 Bxf6 11. b4 Nd7 12. Ne1 Bg7 13. Nd3 a5! 14. a3 f5 15. f3 Qe7 16. Qc2 Nf6 17. c5 h5 $15 { [%draw arrow,g7,h6] }) (9. Nd2 a5 10. Qc2 Ne8 (10... Bh6!? { positionally interesting }) (10... Nfd7 { also good } 11. Nb3 (11. b3 f5 12. f3 Nf6 13. a3 Bh6 $15) 11... f5 12. exf5 (12. Bd2 f4 13. f3 (13. Bg4 h5) 13... Bf6 14. Nxc5 Nxc5 15. b3 Bd7 16. a3 a4! 17. b4 Nb3 18. Rab1 Bh4 $15) 12... gxf5 13. f4 a4 (13... e4?! 14. Be3 $14 { this is the type of position black should not end with. }) 14. Nxc5 Nxc5 15. fxe5 Bxe5 16. Bf4 Qf6 $10 { equal position according to stockfish. I would be slightly worried about black's kingside, though. }) 11. Nb3 (11. a3?! a4! $15) (11. b3 { typical, to prepare a3,b4, but to slow in this case } 11... f5 12. f3 Bd7 13. a3 (13. exf5 gxf5 (13... Bxf5?! 14. Nde4 $14) 14. f4 exf4! { this is the best for black } (14... e4!? { this is already good for black, because white does not have any minor piece close to the e3 square }) 15. Bb2 Nf6 16. Rxf4 Qe7 $17) 13... Qh4 $15 { [%draw arrow,h6,f4] [%draw arrow,g7,h6] }) 11... f5!? (11... Nxb3 12. axb3!? Bd7 13. Be3 b6 14. b4 axb4 15. Na2 $13) 12. Nxc5 dxc5 { if black wants to avoid this structure (which, however, is perfectly playable) then he should play 10...Nfd7, rather than Ne8 } 13. Be3 b6 14. b3 (14. exf5 gxf5 15. f4 e4 16. Rad1 Nd6 $13) 14... Nd6 $13 { fighting game, even chances }) 9... a5 10. Bg5 (10. Ne1 Nfd7 (10... Nh5!? { creative, and totally playable. Once again, exchanging white's LSB proves good for black } 11. Bxh5 gxh5 12. Nd3 Nxd3 13. Qxd3 f5 14. exf5 Bxf5 15. Ne4 h4 $13 { complex, but black looks more than okay }) 11. Nd3 f5 12. f3 (12. exf5 gxf5 13. f4 Nxd3 (13... e4 14. Nf2 { [%draw arrow,c1,e3] [%draw arrow,g2,g4] }) 14. Bxd3 e4 15. Be2 Nc5 16. Be3 Bd7 17. Rad1 a4 $13) 12... Nxd3 13. Bxd3 f4 14. Bd2 Nc5 15. Be2 g5 16. b3 h5 (16... Bd7 { is another possible approach } 17. a3 a4! 18. bxa4 Nxa4 19. Nxa4 Bxa4 20. Qb2 b6 $10) 17. a3 g4 18. Rfb1 (18. b4 g3! { classic king's indian theme } 19. h3 Qh4 $19) 18... b6 (18... Qh4 19. Be1 g3 20. h3 a4 21. bxa4 b6 22. Nb5 Rf7 23. Bf1 Nxa4 24. Bb4 Bf8 25. Nc3 Bd7 { this can be some sort of positional draw }) 19. b4 Nb7 20. Nb5 Rf7 21. Be1 Qg5 22. Qd3 (22. bxa5 Nxa5 23. c5 bxc5 24. Qa4 h4! 25. Bxa5 h3 26. Nxc7 g3 $19) 22... Bf6 23. Bd1 Rg7 24. Kf1 g3 25. h3 Qh4 26. Qe2 Bxh3! 27. gxh3 Qxh3+ 28. Qg2 Qc8!! $19 { [%draw arrow,h4,h3] [%draw arrow,h5,h4] }) (10. Nd2 { transposes to 9.Nd2 a5 10.Qc2 }) 10... h6 11. Bh4 { this is very common, but maybe is not the best approach. Now black can follow some classical path such as Bd7,Qe8,h5,Bh6, or simply playing g5 and Nh5, which is given as favorable for black by stockfish! } 11... g5! (11... Bd7 12. Nd2 Qe8 13. b3 (13. a3?! a4) (13. Nb3!? { maybe very interesting }) 13... Nh7 14. a3 h5 { [%draw arrow,h5,h4] [%draw arrow,g6,g5] } 15. f3 Bh6 16. Rab1 f5 17. b4 axb4 18. axb4 Na4 19. Nd1! g5 20. Bf2 g4 $13 { and this is just a mess, Giri-Liren (2015) }) 12. Bg3 Nh5 { black scores incredibly well from this position } 13. Nd2 (13. Ne1 g4! (13... Nf4 { also good } 14. f3 f5 15. Bf2 b6 16. Bxc5 bxc5 $15) 14. Nd3 Na6! 15. f3 (15. Nd1 Qg5 16. c5 f5 17. exf5 Bxf5 18. cxd6 cxd6 19. Ne3 Bg6 $17) 15... Nxg3 16. hxg3 gxf3 17. Rxf3 Qg5 18. Raf1 f5 $15) 13... Nf4! { it is worth remembering that black does not want necessarily take the Bg3, but rather the Be2 } 14. Rfe1 f5 (14... Nxe2+!? 15. Rxe2 f5 16. exf5 Bxf5 17. Nde4 g4 $15) 15. Bf1 g4 16. exf5 Bxf5 17. Nde4 h5!? { here computer already gives slight advantage to black, due to the threat h4 } 18. Qd2 (18. Bxf4 exf4 19. Qd2 Nxe4 20. Nxe4 Qh4 21. Qxf4 Bxe4 22. Qxe4 Qxf2+ 23. Kh1 Qf5 24. Qxf5 Rxf5 25. Re7 Raf8 $17) 18... Nxe4 (18... a4?! { not the best, black should avoid to get weakness } 19. Nxc5 dxc5 20. Rad1 Ng6 21. f3 $13) 19. Nxe4 Ng6! { [%draw arrow,h5,h4] } 20. f3 (20. h3 gxh3 21. gxh3 Nh4 22. Qc3 (22. Qe3 Bxe4 23. Qxe4 Nf3+) (22. Qd3 Bg6 23. Bxh4 Qxh4 24. Qg3 { transposes }) 22... Bg6! { [%draw arrow,h4,f3] } 23. Bxh4 Qxh4 24. Qg3 Qxg3+ 25. fxg3 Rf3 $17) 20... gxf3 21. gxf3 h4 22. Bf2 Nf4 $15 *