GOTW: Martinez - Zhou, 2016 Women's Continental Ch.

[Event "CAMPEONATO CONTINENTAL FEMENINO 2016"]
[Site "MANZANILLO COLIMA MEX"]
[Date "2016.11.10"]
[Round "6.3"]
[White "Martinez, Ayelen"]
[Black "Zhou, Qiyu"]
[Result "0-1"]
[ECO "C95"]
[WhiteElo "2238"]
[BlackElo "2312"]
[Annotator "MacKinnon / Upper"]
[PlyCount "60"]
[EventDate "2016.??.??"]
[WhiteClock "0:36:36"]
[BlackClock "0:14:40"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Nb8 {Nowadays, a popular choice. The basic idea is to reroute the
Knight to d7 and then fianchetto the Bishop.} (9... Na5 {is the classical
continuation} 10. Bc2 c5) 10. d4 (10. a4 $5 {is a seldom-played possibility,
but it doesn't appear to yield much} Bb7 11. axb5 axb5 12. Rxa8 Bxa8 13. d3)
10... Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. a4 {It's clear
that both players were booked up. So far, all of White's moves are the most
common in the position.} c6 {this is a solid way of playing the position, but
my feeling is that White gets a small edge.} (15... c5 {would be my first
reaction here - contesting the centre and not minding a closed position} 16. d5
c4 $1 {And an unclear position with chances for both sides emerges.} 17. Bg5 {
is scoring best for White. It provokes ...h6 before heading back to e3} h6 18.
Be3 Qc7 {recommended by GM Roiz, whose opinion is based on the game} 19. Qd2 h5
20. Ra3 Nc5 21. Rea1 Bg7 22. Qc1 Nfd7 23. axb5 axb5 24. Rxa8 Rxa8 25. Rxa8+
Bxa8 26. Qa1 Bb7 {1/2-1/2 (47) Kokarev,D (2611)-Khismatullin,D (2656) St
Petersburg, 2013.}) 16. Bg5 Bg7 17. Qd2 Qc7 {We're still in established
opening theory here, but I can't help but feel that Black's play has been a
little too tentative. White has a clear edge.} (17... Qe7 18. b3 (18. b4 Nb6
19. Bb3 bxa4 20. Bxa4 Nxa4 21. Rxa4 Qe6 22. Bh6 Bh8 23. Ng5 Qe7 24. f4 exf4 25.
Qxf4 Nd5 $1 26. Qd2 f6 27. Nf3 Nb6 28. Raa1 Qf7 {1/2-1/2 Kovalev,V (2557)
-Sargissian,G (2671) Minsk, 2014.}) 18... Rac8 19. axb5 cxb5 20. d5 Rc7 21. Be3
Rec8 22. Ne2 Nc5 $11 {1-0 (106) Hou,Y (2673)-Kosintseva,T (2483) Beijing 
(blitz), 2014.}) 18. Bh6 Bh8 (18... Nf8 19. b4 Ne6 20. Bb3 Nd7 21. Rad1 bxa4
22. Bxa4 a5 23. bxa5 Rxa5 24. Bb3 Ndf8 25. Bxg7 Kxg7 26. Nf1 $14 {1-0 (70)
Kosteniuk,A (2498) -Zhao,X (2496) Moscow, 2011.}) 19. Nf5 $1 $146 {A strong
novelty, putting Qiyu under a lot of pressure. White's advantage stems from
more active pieces and a space advantage.} (19. Bb3 c5 20. Ng5 c4 21. Bc2 d5
22. dxe5 Nxe5 23. f4 $6 Neg4 $1 24. hxg4 Nxg4 25. e5 (25. Nxf7 Qb6+ $15) 25...
Nxh6 26. Nf3 Ng4 $15 {1-0 (40) Polgar,J (2687)-Golod, V (2599) Netanya, 2009.})
19... Rad8 20. axb5 axb5 21. Ra7 d5 $2 {The first mistake of the game but also
a very serious one. Qiyu understandably tries to untangle her position
somewhat by hitting back in the centre. There is a major tactical flaw,
however.} (21... Nf8 $142) (21... Nb6 $142) 22. Qg5 $2 (22. Nxe5 $1 Nxe5 (22...
dxe4 23. Nxf7 $1 $18 Qb6 (23... Kxf7 24. Rxb7 (24. Bb3+ Nd5 25. Rxb7) 24...
Qxb7 25. Nd6+) 24. Rxb7 Qxb7 25. Qg5 {and Black cannot survive.}) 23. dxe5 {[#]
} dxe4 (23... Rxe5 24. Bf4 $18) (23... Qb8 24. exf6 Qxa7 25. Ne7+ Rxe7 26. fxe7
Re8 27. Bg5 $1 (27. exd5 cxd5 {should also win.}) 27... Qc5 (27... f6 $2 28.
Be3 Qa2 29. Bc5 $18 {and the e7 pawn is a monster.}) 28. e5 $1 {A neat move
aiming for Bf6; just compare the activity of the Bishops.}) 24. Nd6 $18 Rxe5
25. Rxb7 Qxd6 26. Qxd6 Rxd6 27. Bf4 $1 {An important final nuance} (27. Rxe4 {
is strong as well - taking advantage of back rank problems.})) 22... dxe4 $1 {
And Qiyu is right back in it!} 23. Bb3 Nb6 $2 (23... Rb8 {A hard move to play
- but necessary to defend against Bxf7+ and Rxb7 followed by Nd6+ ideas} 24.
Rxe4 $1 c5 (24... Nxe4 $2 25. Qe7 $1 {This is the wildest position I've seen
in a while! Black's getting checkmated in a few more moves.}) (24... Nc5 $2 {
Almost works, but the computer shows a very pretty line:} 25. Rxe5 (25. dxc5 $2
Nxe4 $15) 25... Nxb3 26. Qf4 $3 Rxe5 27. Nxe5 Nd5 (27... Rc8 28. Nd6 Qxd6 29.
Nxg6 Qxf4 30. Ne7#) 28. Nxg6 $3 Nxf4 (28... hxg6 29. Ne7+ Qxe7 30. Qxb8+ $18)
29. Nfe7+ Qxe7 30. Nxe7#)) 24. Nxe5 (24. Bxf7+ $3 Kxf7 (24... Qxf7 25. Nxe5
Rxe5 26. dxe5 Nbd5 $18) 25. Nxe5+ Ke6 (25... Kg8 26. Nxg6 $18) 26. Ng3 $18 {
And Black is in big trouble with her King so exposed.}) 24... Nfd5 {The right
idea - limiting the b3 Bishop's scope.} 25. Ng4 (25. Qh4 $1 Ra8 (25... f6 26.
Nxg6 $1 hxg6 27. Bf4 {All of White's pieces are coordinated perfectly. Here's
the line my Komodo engine gives:} Qc8 28. Nh6+ Kf8 29. Ng4 Bg7 30. Bh6 Nd7 31.
Bxg7+ Kxg7 32. Qh6+ Kf7 33. Qh7+ Ke6 34. Qxg6 Kd6 35. Nh6 $18) 26. Rxa8 Bxa8
27. Rxe4 $18 {White is up material, her pieces are better, and her attack
continues.}) 25... Qb8 26. Rea1 Nc4 27. Qh4 (27. Nfe3 $1 Ncxe3 (27... Ndxe3 28.
fxe3 $18 (28. Nxe3 $18) 28... f5 29. Nf6+ Bxf6 30. Qxf6 Rd7 31. R1a4 Rf7 32.
Qh4 bxa4 33. Bxc4 Qxa7 34. Qf6 {#2.}) 28. fxe3 $18 Rd6 29. Bxd5 cxd5 30. Qh4 {
threatening Bf4.}) 27... f6 $2 (27... Rd7 $142 $16) 28. Nfe3 Ncxe3 29. Nxf6+ $4
{Any of the three recaptures on e3 leaves White with a winning advantage.} Bxf6
30. Qxf6 Nf5 {Only move.} {And if the game score is correct, White resigned here. It is
aways shocking when your opponent comes back with a move you had overlooked 
(30... Nf5), but it's necessary to compose yourself and try to find the best
move. If we take stock, White is down a piece for a pawn, but the exposed
Black King and the terrible Bb7 give White big compensation. In fact, there is
actually a forced draw here after:} (30... Nf5 $11 31. Bf4 $1 {and Qiyu would
do best to go for the draw after ...Qxf4:} Qxf4 (31... Qc8 32. Be5 Rxe5 $13 33.
dxe5 Rf8 34. Bxd5+ cxd5 35. Qb6 Rf7 {Only move.} (35... Bc6 36. Rc7 $18) 36. Kh2 {
major prophylaxis against ...d4 and ...e3 followed by ...Qc2.} (36. e6 $5 $13))
32. Rxb7 Rf8 33. Bxd5+ cxd5 34. Qe6+ Kh8 35. Raa7 Qc1+ $11 {with a repetition.}
) 0-1