.
[Event "World op 43rd"]
[Site "Arlington"]
[Date "2015.07.01"]
[Round "1"]
[White "Jacobson, Aaron"]
[Black "Kovalyov, Anton"]
[Result "0-1"]
[ECO "B96"]
[WhiteElo "2214"]
[BlackElo "2613"]
[Annotator "Upper,John"]
[PlyCount "62"]
[EventDate "2015.07.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[Source "Chess Canada"]
[SourceDate ""]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qc7 8. Bxf6
gxf6 9. Qf3 {This doesn't score well anymore. Normal is Qd2, or
Qf3 before taking on f6. Perhaps White was mixing up systems?} b5 10. Bd3 Nd7
11. f5 $5 Nc5 12. O-O Nxd3 13. Qxd3 (13. cxd3 $1 {looks like the
right way to capture, so long as it doesn't result in problems along the a7-g1
diagonal, and I don't see any.}) 13... b4 14. Nd1 (14. Nd5 $2 {White doesn't
have enough pieces to make this work:} exd5 15. exd5 Bb7 16. Rfe1+ Kd7 $19)
14... e5 $1 15. Ne2 a5 16. c4 Qc5+ (16... bxc3 $4 17. Ndxc3 {letting White's
Ns play leaves Black with a horrible Najdorf.}) 17. Kh1 Bh6 18. Rf3 Bb7 19. Rh3
{Critical Position Where is Black's Bg5 going?} Bg5 20. Rh5 {
Now the B has no escape from White's pawns.} Ke7 $1 21. h4 Bf4 22. g3 {
Consistent: White plays to trap the B... Is a bad plan better than no plan?}
Rag8 $1 (22... Rac8 $5 {is a computer improvement, with a similar point to the
game: after} 23. gxf4 (23. b3 Rcg8 $19) 23... Qxc4 24. Qxc4 Rxc4 {Stockfish
rates this -+ and Houdini (which takes much longer to see as far ahead) as =/
+. The Rh5 is useless... though whether Black can free his Rh8 (e.g. with ...
Kf8-g7-h7/h8) is not something I can see.}) 23. gxf4 (23. Kh2 Rxg3 (23... Rg7
$19) 24. Nxg3 Rg8 $19) 23... exf4 $19 {Only move to win: preventing Ne3-d5. Now we see
Black's hilarious point: he's lost a B but the Rh5 is permanently trapped
while his K is a sitting duck.} 24. Qf3 (24. Nxf4 $4 Qg1#) 24... Rg7 {Only move.} 25.
Qxf4 (25. Qf2 Bxe4+ 26. Kh2 Rg2+ $19) 25... Qxc4 $19 {Only move.} 26. Ng3 Rxg3 {Only move.} (26...
Rhg8 $2 27. Rg5 $1 fxg5 28. f6+ $13) 27. Qxg3 Qxe4+ 28. Kg1 Rg8
$1 29. Qxg8 Qe1+ {Only move.} 30. Kh2 Qh1+ 31. Kg3 Qg2+ {and ...Qf3#. A very nice finish
by Kovalyov.} 0-1
.