Showing posts with label preparation. Show all posts
Showing posts with label preparation. Show all posts

17.9.15

How Good Was the Preparation?

Round two of the World Cup continued with many interesting games. The rating favorite did well in most of the games, but there were a couple of exceptions. Sergey Karjakin lost to Alexander Onischuk with the black pieces, and the other surprise was pleasant for the hosts:
A game that I liked (ChessBase 13)

[Event "FIDE World Chess Cup"]
[Site "?"]
[Date "2015.09.14"]
[Round "10.25"]
[White "Guseinov, Gadir"]
[Black "Navara, David"]
[Result "1-0"]
[WhiteElo "2634"]
[BlackElo "2728"]
[Annotator "Bojkov, Dejan"]
[PlyCount "101"]
[EventDate "2015.??.??"]
[WhiteClock "0:13:58"]
[BlackClock "0:44:32"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 {Diagram [#] Navara's great memory
gives him the advantage of diversity in the opening.} 5. Ng3 Bg6 6. h4 h6 7.
Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. O-O-O Be7 13. Ne4 {
This knight is quite a problematic piece in the Caro- Kann for White and
Guseinov hurries to bring in back in the center.} Nxe4 {On the other hand
Black is happy to trade some pieces.} 14. Qxe4 Nf6 15. Qd3 {Diagram [#] A
fighting move.} ({The main line is considered harmless for Black} 15. Qe2 {due
to the maneuver} Qd5 16. c4 Qe4 17. Qxe4 Nxe4 18. Be3 f5 19. Nd2 Nf6 20. Nf3
Bd6 {1/2-1/2 (20) Harikrishna,P (2740)-Berkes,F (2659) Kocaeli 2015}) 15... c5
{A relatively rare move. The main continuations are} (15... O-O) ({and} 15...
Qd5) 16. Kb1 cxd4 17. Nxd4 O-O $6 {What can be more natural than that?!
Instead, both} (17... Rc8) ({and} 17... Qd5 {would be playable.}) 18. Bxh6 $5 {
[%csl Yd8][%cal Rd1d8,Rd3g3] Diagram [#] Kaboom! Something went wrong with
Navara's preparation as this move is not even a novelty! Or maybe he just
considered the complications favourable for him? Judging by the speed with
which he was banging the moves, it should have been the latter.} gxh6 19. Qg3+
Kh8 20. Nxe6 fxe6 21. Rxd8 Raxd8 22. Qe3 Ng8 23. Qxa7 $146 {Diagram [#] Both
players are blitzing, Guseinov comes up with a novelty. The stem game saw} (23.
f4 Rf5 24. g4 Rfd5 25. a3 e5 26. fxe5 {with advantage for White Kokarev,D
(2628)-Gavrilov,A (2456) Moscow 2014}) 23... Bf6 24. f3 {Finally, both players
start thinking. The material balance is weird. A queen and three pawns are
fighting a rook, bishop and knight. Techically speaking we have 9+3=5+3+3.
White should be up a pawn. Concretely speaking, White should be better thanks
to his safe king. However, if Black managed to co-ordinate his pieces, the
evaluation will change as the pieces can easily outnumber the queen in the
attack against the white pawns for instance.} Ne7 (24... Rf7 $5 {looks more
solid.}) 25. Qe3 {Diagram [#] White wins pawn number four but the black rooks
occupy the open files.} Bg7 26. Qxe6 Nd5 27. c3 Rfe8 28. Qf5 {Compy criticizes
this move and suggests instead} (28. Qg6 {presumably to defend the g2 pawn
with the queen. However then Black has} Re2 {and if} 29. Rc1 Nf4 $1 {is
unpleasant for White to say at least.}) 28... Re2 {Creates concrete threats.}
29. Rc1 {Or else Black can sacrifice on c3} (29. g4 Bxc3 {Diagram [#]} (29...
b5) (29... Ne3 {are not bad neither.}) 30. bxc3 Nxc3+ 31. Kc1 Nxa2+ {with
guaranteed draw.}) 29... Rxg2 {Now Navara rejects the draw, possible after} (
29... Ne3 30. Qb5 Rdd2 {[%csl Re8,Yh8][%cal Re8g6,Rg6e8,Rb5e8] Diagram [#]} 31.
Qe8+ Kh7 32. Qg6+ $11) 30. a3 b5 31. Qf7 Nf6 {The position is very complicated.
Navara had other interesting options:} (31... b4 $5 {might lead to a forced
draw (!) after} 32. axb4 Nxb4 33. Qc7 Bf6 34. Re1 Rgd2 35. cxb4 Rxb2+ 36. Kc1
Ra8 37. Re5 $1 {Diagram [#]} Rg2 38. Kb1 Rd8 39. Re1 Ra8 (39... Rb2+ 40. Kc1
Ra8) 40. Re5 Rd8 $11) ({While} 31... Ne3 32. Re1 Nc4 33. Re8+ Rxe8 34. Qxe8+
Kh7 35. Qxb5 {is not that great as the endgame after} Rxb2+ 36. Qxb2 Nxb2 37.
Kxb2 $18 {Diagram [#] is lost for Black. The pawns easily outnumber the bishop.
}) 32. Qb7 Rd5 ({White is better after} 32... Rdd2 33. Qxb5 Nxh5 34. Re1) 33.
f4 $1 {[%csl Gf4] Diagram [#] Surprisingly, Black has problems with the moves
after this. The queen is taking care of everything.} Kh7 34. Re1 {The rook got
active and Black decided to give the b5 pawn but to activate the pieces.} Rdd2
35. Qxb5 Nd5 36. Ka1 $1 {Nice prophylaxis as if White carelessly advances the
pawn} (36. a4 $2 {[%csl Ye1] Diagram [#] there is} Rxb2+ 37. Qxb2 Rxb2+ 38.
Kxb2 Bxc3+ {and Black wins.}) 36... Rgf2 ({Here} 36... Rxb2 $2 {is bad due the
counter-attack} 37. Qd3+ Kh8 38. Re8+ Bf8 39. Qxd5 $18) 37. Qe8 {Diagram [#]
Threatens mate in two.} Nxf4 38. Qe4+ Kh8 39. Qa8+ Kh7 40. Qe4+ Kh8 {Guseinov
made the control moves just in time to get the needed time to find the right
continuation.} 41. Qf5 $1 Rd8 {[%csl Yd8] Diagram [#] Once that the active
black pieces go back, White gets the time he needs to push his queenside pawns.
} 42. Qb5 (42. Qf7 $5 {was not bad neither.}) 42... Rd5 {This makes things
easier for White.} (42... Kh7 {was more stubborn but White is much better
anyway.}) 43. Re8+ Kh7 44. Qc4 {[%csl Rh7][%cal Rc4e4] Diagram [#] The threat
Qc4-e4+ forces the black king out.} Rxh5 45. Qg8+ Kg6 46. Re7 Rh1+ 47. Ka2 Nh5
48. Qe6+ {And the powerful white pieces finished the job.} Nf6 ({Or} 48... Kh7
49. Qe4+) ({Hopeless is} 48... Bf6 49. Qg4+ Bg5 50. Qe4+ Kf6 (50... Rf5 51.
Re6+) 51. Qe6# {Diagram [#]}) 49. Qf7+ Kf5 50. Qxg7 Rhh2 51. Rb7 {Diagram [#]
An epic, irrational battle.} 1-0



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