..
[Event "WORLD YOUTH UNDER-16 CHESS OLYMPIAD-201"]
[Site "Corum – Turkey"]
[Date "2019.10.30"]
[Round "2.4"]
[White "Nalbant, Tuna Onat"]
[Black "Talukdar, Rohan"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2401"]
[BlackElo "2369"]
[Annotator "John Upper"]
[PlyCount "100"]
[EventDate "2019.10.29"]
[EventType "team-tourn"]
[WhiteTeam "TUR-R"]
[BlackTeam "CAN"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 {The Najdorf...} 6. h3 {
[#] ... (Weaver) Adams variation: White prepares g2-g4 and Bg2, when both the
B and the g-pawn (g4-g5!) help White fight for the d5 and e4 squares.} e5 (6...
e6 {is more popular, and is the line recommended in "OR: The Najdorf"
(Everyman, 2019) by Canada's Doknjas brothers. The idea is to transpose to a
Schevenningen Keres Attack, where h2-h3 is less useful than ...a6.} 7. g4 Be7
8. g5 Nfd7 9. h4 b5 10. a3 Bb7 11. Be3 Nc6 12. Qd2 O-O 13. O-O-O Nc5 14. f3 Rb8
$13 {1/2-1/2 (37) Anand,V (2779)-Giri,A (2771) London 2016}) 7. Nde2 h5 {
... stopping g2-g4 is Black's most common and best-scoring line.} 8. Bg5 Be6 9.
Bxf6 {Immediately conceding the B-pair isn't necessary, but it is the most
popular, and simplifies into a strategic battle for the central light squares.}
Qxf6 10. Nd5 Qd8 11. Qd3 {The currently hot move for White, preparing 000.} (
11. Nec3 g6 12. Bc4 Bh6 13. O-O O-O {has scored well for Black; e.g.} 14. Bb3
Nc6 15. Qd3 Rc8 16. Rad1 Nd4 17. Ne2 Nxb3 18. Qxb3 b5 $11 {1/2-1/2 (47)
Nakamura, H (2787)-Vachier Lagrave,M (2768) Saint Louis, 2014.}) 11... Nd7 12.
O-O-O g6 13. Kb1 Nc5 14. Qf3 Bg7 15. Nec3 {[#]} O-O (15... b5 16. Ne3 O-O (
16... h4 17. Ncd5 (17. g3 $5) 17... O-O 18. Rg1 Rc8 19. g3 $13 {1/2-1/2 (74)
Preotu,R (2502) -Ruiz Castillo,J (2379) Brownsville 2017}) 17. Rg1 Bh6 18. Ncd5
Bxe3 19. Qxe3 Rc8 20. Be2 Kg7 21. f4 Bxd5 22. Rxd5 exf4 23. Qxf4 Re8 24. Rxd6
Qe7 $11 {1-0 (40) Anand,V (2783)-Nepomniachtchi,I (2742) Saint Louis 2017}) 16.
g4 h4 {[#]Black has to keep the kingside closed.} 17. Qe3 {This Novelty is
both Leela and Stockfish's top choice.} (17. Rg1 Qg5 18. Ne3 Rad8 19. Ncd5 b5
20. Be2 Rb8 21. Qh1 Rfd8 22. Nb4 Rbc8 23. Nf5 a5 $1 24. Nd3 d5 $1 25. Nxc5 Rxc5
26. Bd3 Bf8 27. exd5 Bxd5 28. Qh2 Bf3 29. Rde1 e4 30. Bxe4 Bxe4 31. Rxe4 Qd2
32. Ne3 Rxc2 33. Qe5 Bg7 34. Qe8+ Kh7 $1 35. Nxc2 Qd1+ 36. Rxd1 Rxd1# {0-1 (36)
Popov,I (2609)-Nepomniachtchi,I (2733) Antalya 2017}) 17... Bxd5 $5 18. Nxd5
Bf6 19. Nxf6+ Qxf6 20. g5 Qe7 (20... Qf4 $5 21. Qxf4 exf4 22. f3 $16 {I doubt
Black will get enough play to make up for the weak pawns on h4, f4 and d6.})
21. Bc4 Ne6 {[#]A key moment: here (and later) both sides have to choose about
trading the minors. In this position, the exchange seems to favour White, but
the QRR ending might not give enough winning chances.} 22. Rhg1 (22. Bxe6 $14
fxe6 23. Rd3 Rf4 (23... Kg7 24. Rhd1 Rad8) (23... Rac8) 24. Rhd1) 22... Nf4 23.
Rg4 Rac8 24. Bd5 {This gives Black the option to exchange N for B. Retreating
with Bb3 keeps the minors on, but White may have been worried that the B would
be a tempo-winning target for Black' queenside pawn storm. However, with a2-a3,
followed by a3-a4 if Black pushes ...b4, White could keep both the B and the
queenside closed.} Kg7 25. Rdg1 Rh8 $6 (25... Nxd5 $1 26. exd5 Qd7 $3 {gives
up the h-pawn to activate the Q.} (26... Rc5 $11) 27. Rxh4 Qf5 $1 28. Re4 (28.
Rc1 Rc5 $15) 28... Rc5 29. Rd1 (29. f4 $1) 29... Rh8 (29... Rfc8 $15) 30. h4
Rxh4 31. Qxc5 {Only move.} Qf3 $1 32. Rc1 {Only move.} dxc5 33. Rxh4 Qxd5 $17) 26. Rxf4 $1 {
This exchange sac is the only way for White to play for advantage. Black's Rs
have no open files, and the Bd5 both attacks the kingside and stabilizes the
half-open c- and e-files. Even so, Black's game is not too difficult to play
as White has so few targets.} exf4 27. Qxf4 Rcf8 28. Qe3 $2 (28. Qg4 $1 $14 {
also gets out of the way of the f-pawn, and so prepares f2-f4, and also x-rays
g6; for example} f6 (28... Qe5 29. f4 $16) 29. gxf6+ Qxf6 30. f4 $16 (30. Qd7+
$2 Kh6 {when taking on b7 with either piece fatally activates Black's Rs.})
30... Kh6 31. a3 Rh7 32. e5 $16) 28... f6 $1 29. a3 fxg5 30. Rxg5 Rxf2 31.
Rxg6+ Kxg6 32. Qxf2 Rf8 {Black's K is much more exposed than White's, but
Black now has open files for his R. Computers say this is equal, but it looks
easier to play as Black.} 33. Qe2 (33. Qg1+ $5 Qg5 34. Qb6 $13) 33... Rf4 34.
Ka2 b5 35. Qg2+ Qg5 {The endgame without Qs is obviously lost for White, so
for the rest of the game Black can bully the White Q to activate his own.} 36.
Qe2 Rf6 37. Bc6 $2 (37. c4 $13) 37... Kg7 38. Bd7 $2 (38. Bd5 $15) 38... Qc5 $1
{Threatening both....Qc4+ trading Qs, and invading on f2.} 39. Qg4+ $6 (39.
Qg2+ $1 Rg6 40. Bg4 $17 {and Black has more work to do to activate his R.}) (
39. Bf5 $4 Qc4+ $19 {trading Qs.}) 39... Rg6 {Only move.} $19 40. Qd1 Rg2 $6 {One of
Black's few sub-optimal moves, made at the time control.} (40... Qc4+ $1) (
40... Rg1 $1) 41. c3 $2 (41. Be6 {Only move.} {indirectly defends c2 by creating
perpetual check threats.} Qe5 $1 (41... Rxc2 $2 42. Qg4+ $11) (41... Qxc2 $2
42. Qd4+ $11) 42. Bd5 $17 (42. Bf7 $5 {is a tricky blitz move, but not
something Black should fall for after the time control in a tournament game.}))
41... Qxc3 42. Qb1 (42. Qg4+ Rxg4 43. bxc3 Rxe4 $19) 42... b4 43. axb4 Qxb4 44.
Qc1 Qa5+ 45. Kb1 Qc5 46. Qxc5 dxc5 47. Ka2 Kf6 48. Kb3 Ke5 49. Bf5 Kd4 50. Bh7
Rg3+ 0-1
..
