[Event "73rd ch-RUS 2020"]
[Site "Moscow RUS"]
[Date "2020.12.14"]
[Round "9"]
[White "Dubov, Daniil"]
[Black "Nepomniachtchi, I."]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2702"]
[BlackElo "2784"]
[Annotator "Fritz 13 (10m)"]
[PlyCount "79"]
[EventDate "2020.12.05"]

{D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3} 1. d4
Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bb5+ c6 8. Ba4 b5
9. Bb3 a5 10. Nf3 O-O 11. O-O a4 (11... c5 12. a4 b4 13. cxb4 cxd4 14. b5 Bb7
15. e5 e6 16. Bg5 Qb6 17. Qxd4 Qxd4 18. Nxd4 Bxe5 19. Rad1 Re8 20. Rfe1 Bg7 21.
Nxe6 {1-0 (21) Nakamura,H (2736)-So,W (2770) Lichess.org INT 2020 CBM 196
Extra [Krasenkow,M]}) 12. Bc2 c5 $146 (12... Nd7 13. Rb1 Nb6 14. Bd3 Be6 15. d5
cxd5 16. Rxb5 dxe4 17. Bxe4 Bc4 18. Qxd8 Raxd8 19. Rxb6 Bxf1 20. Ba3 Bd3 21.
Bc6 Rb8 22. Rxb8 Rxb8 23. Bb4 a3 24. h3 e6 25. Ne1 Bb1 26. Bxa3 Bxc3 27. Nf3 {
Janocha,W (2305)-Pribyl,J (2430) Pardubice 1992 0-1}) 13. Rb1 Nc6 14. d5 {This
push gains space} Ne5 15. Nxe5 Bxe5 16. Bh6 (16. Bd2 Rb8 $16) 16... Ba6 (16...
Re8 17. Qf3 $11) 17. Bxf8 Kxf8 18. f4 (18. Qf3 Qa5 19. Rfc1 Bxc3 $14) 18...
Bxc3 19. Rf3 {White threatens to win material: Rf3xc3} Qa5 20. e5 {White gains
space} (20. f5 b4 $14) 20... Kg8 (20... Kg7 21. Rh3 b4 22. e6 $11) 21. Kh1 $14
Rd8 $2 (21... Bd4 $142 $14 {and Black is still in the game}) 22. e6 $18 fxe6 $4
{the final mistake, not that it matters anymore} (22... Bb7 $142 23. exf7+ Kxf7
$18) 23. Bxg6 hxg6 (23... Rxd5 {is not the saving move} 24. Bxh7+ $1 {Double
attack: c3/h7} Kxh7 25. Qc2+ Rf5 26. Rxc3 $18 (26. Qxc3 $6 Qxc3 27. Rxc3 b4 $11
)) 24. Qc2 Bg7 (24... Kf7 {a fruitless try to alter the course of the game} 25.
Rg3 (25. Qxc3 $6 {is a weaker possibility} Qxc3 26. dxe6+ Kf6 27. Rxc3 Rd2 $11)
25... Rg8 26. dxe6+ (26. Qxc3 $6 {is a bad alternative} Qxc3 27. dxe6+ Kxe6 28.
Rxc3 Rc8 $16) 26... Kf6 27. Rxc3 $18 (27. Qxc3+ $6 Qxc3 28. Rxc3 c4 $16)) 25.
Rg3 g5 (25... exd5 26. Qxg6 Qc3 27. Rxc3 Rf8 28. Rg3 Rf7 29. Qxa6 b4 30. Qc8+
Rf8 31. Qxc5 d4 32. Qxd4 Rf6 33. Rxb4 Kh7 34. Qe4+ Kg8 35. Qxe7 Rf7 36. Rb8+
Kh7 37. Qxf7 Kh6 38. Qg6#) (25... Rxd5 $4 {Black will choke on that pawn} 26.
Qxg6 Kf8 27. f5 $18) 26. Qg6 Qd2 (26... exd5 27. Qxg5 Kf7 28. Qxg7+ Ke8 29. Re3
Kd7 30. Rxe7+ Kc8 31. Ra7 Qb6 32. Ra8+ Qb8 33. Qa7 Qxa8 34. Qxa8+ Kc7 35. Qxa6
Ra8 36. Qxa8 b4 37. Qxd5 Kb6 38. Rc1 b3 39. Rxc5 Ka6 40. Qc6+ Ka7 41. Ra5+ Kb8
42. Ra8#) 27. Rxg5 Qc3 28. Qxe6+ Kf8 29. Re1 Qxe1+ 30. Qxe1 Bf6 31. Qh4 Rd6 32.
Qh7 Ke8 33. Qg8+ Kd7 34. Qa8 Bxg5 35. fxg5 c4 36. h4 b4 (36... c3 {doesn't
improve anything} 37. Qa7+ Kd8 38. Qc5 $18) 37. Qa7+ Ke8 38. Qb8+ Kf7 39. Qxb4
Rxd5 40. Qxa4 (40. Qxa4 Bb5 41. Qc2 $18) 1-0