[Event "Guimaraes Open 2021"]
[Site "Guimaraes"]
[Date "2021.08.28"]
[Round "6.2"]
[White "Niemann, Hans Moke"]
[Black "Yankelevich, Lev"]
[Result "1-0"]
[ECO "E97"]
[WhiteElo "2606"]
[BlackElo "2412"]
[Annotator "Iccf GM Matjaz Pirs,3700X"]
[PlyCount "91"]
[EventDate "2021.08.24"]
[EventType "swiss"]
[EventCountry "POR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
{[%evp 20,91,41,23,37,42,53,56,59,75,128,131,145,143,181,176,192,111,124,129,
113,104,156,156,154,145,223,214,195,92,229,67,79,70,266,257,295,287,302,306,
692,612,634,600,972,943,1283,1244,2513,2229,1640,639,29988,12835,12836,12836,
12836,12835,6797,1583,2911,2048,12822,7216,12822,6423,29988,29989,29994,29995,
29995,29996,29996,29997]} 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6.
Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 a5 {[%csl Rb2,Gb7,Gc2,Rc3,Gd3,Rd4,Rd7,Re3,
Ge4,Rf2,Gf3,Rf7,Gg2,Rg7][%CAl Ge4d5,Gc6b7,Gc6b5,Gd5c4,Gc3d5,Gc3b5,Gc4b5,Ge2c4,
Rd4e5,Gf6g7,Gf6g5,Ge5f4,Gc1g5,Gf3g5,Ge4f5,Rf5e6,Re6f7,Rd5e6,Re6d7]} 10. bxa5
Rxa5 11. a4 {[%CAl Ba2a4,Ba4a5][%mdl 32]} Ne8 {11...c5 is becoming the main
line. E97: King's Indian: Classical Main Line (6...e5 7 0-0 Nc6): 8 Be3 and 8
d5 Ne7, not 9 Ne1.} 12. Bd2 $5 {[%mdl 4] A promising side line.} Ra8 {[#]} 13.
a5 $146 ({Predecessor:} 13. Qc1 Kh8 14. a5 Ng8 15. c5 f5 16. c6 bxc6 17. dxc6
Ngf6 18. Bg5 h6 19. Bxh6 Nxe4 20. Nxe4 fxe4 {1/2-1/2 (61) Sadorra,J (2431)
-Yang,K (2429) Seoul 2008}) 13... f5 {White is slightly better.} 14. Ng5 c5 (
14... Kh8 $142) 15. Na4 $1 $16 Nc7 16. Nb6 Ra7 17. exf5 $1 gxf5 18. f4 (18. Bh5
$18) 18... e4 19. Ra3 h6 20. Nh3 Bd4+ (20... Bd7 $142) 21. Kh1 Ne8 22. Qe1 Ng6
(22... Nf6 $16 {might work better.}) 23. Bh5 $1 $18 {[%CAl Rh5g6]} Nh8 24. g4 (
24. Bxe8 $18 {and White stays clearly on top.} Qxe8 25. Ng1) 24... Nf6 ({Not}
24... fxg4 $2 25. Nxc8 Qxc8 26. Bxg4 $1 $18 {[%mdl 512]}) (24... Qxb6 $16 25.
axb6 Rxa3) 25. Nxc8 $2 (25. Rg3 $1 $18) 25... Qxc8 $14 26. Qh4 {Threatens to
win with gxf5.} Nxh5 $2 ({Don't go for} 26... fxg4 $2 27. f5 $1 $18) (26... b6
$1 $14) 27. Qxh5 $18 Qe8 {Threatening ...e3.} 28. Qxh6 e3 {[#]} 29. Ng5 {
[%csl Gg5][%CAl Rh6h7]} b5 $2 {[#]} (29... Qg6 30. Qxg6+ Nxg6) 30. Bxe3 $1 {
[%mdl 512]} Rf6 (30... Bf6 31. Ne6) 31. Qh3 b4 {Strongly threatening ...fxg4.}
32. Bxd4 cxd4 33. Rg3 Qe2 34. gxf5 Rg7 35. Qg2 Qxc4 36. Ne4 (36. Re1 $142 Ng6
37. Ne4 Rff7 38. Rxg6 Kf8 39. Nxd6 Re7 40. Rf6+ Kg8 {[#]} 41. Qxg7+ $3 {
[%mdl 512]} (41. Nxc4 $2 {leads to mate.} Rxe1+ 42. Qg1 Rgxg1#) 41... Rxg7 42.
Nxc4) 36... Rxg3 37. Nxf6+ Kf7 38. hxg3 Kxf6 {[%mdl 4096] Endgame KQR-KQN} 39.
Rd1 b3 40. Qd2 Qc8 41. g4 Kf7 42. Qxd4 Qc2 43. Re1 {White mates.} b2 44. Qa7+
Kf8 45. Qe7+ {[%mdl 64] Double Attack} Kg8 46. Qe8+ {Weighted Error Value:
White=0.38/Black=0.83} 1-0
