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Ian Nepomniachtchi vs Yaroslav Zherebukh
Aeroflot Open (2012), Moscow RUS, rd 4, Feb-10
Sicilian Defense: Najdorf Variation. English Attack (B90)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
Feb-10-12
Premium Chessgames Member
  tamar: Interesting match-up with Nepo desperate for a win after three draws.

The critical moment came after 30 c4

Zherebukh takes the unprotected pawn 30...Qxc4, but missed the stronger

30...Ra1+
31 Kh2 Rff1
32 Rxd6 (if 32 Nxd6 Bg5!)32...Bxd6
33 Rxd6 Qxc4 34 Rxh6+ (perhaps this check scared Zherebukh, but it is harmless)33...Kg8 and Black is the exchange up.

Feb-10-12
Premium Chessgames Member
  Penguincw: Nepo should've won this game, if he wants to increase his chances of winning.
Feb-11-12
Premium Chessgames Member
  tamar: Looking again at 30...Ra1+ 31 Kh2 Rff1 32 Rxd6 Bxd6 33 Rxd6 Qxc4 34 Rh6+ Kg8


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Black has won the exchange, and White's pieces look disorganized. However, the position is crazy, as this piece of analysis by Houdini illustrates.

35 Rh4 Qc2 36 Nd2 Rh1+ 37 Kg3 Ra2 38 b5 axb5 39 Rd4!


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An unforeseen way to guard the knight

39...Ra3! Sacrificing his own rook, if 39...exd4 allows perpetual Qe8+, Q-h5+

40 Qxa3 exd4 41 Nf3 Qg6+ 42 Kf2 Qxb6 Finally the smoke clears and Black is winning.

Very tricky play by White, and Zherebukh opted for the safer course.

Feb-17-12
Premium Chessgames Member
  notyetagm: Game Collection: TIYDIIIS - THAT IS YOUR DEFENDER IT INTERPOSES I
Feb-17-12
Premium Chessgames Member
  notyetagm: Game Collection: BALEFUL INFLUENCE: every single square attacked
Feb-17-12
Premium Chessgames Member
  notyetagm: Game Collection: ESSS*I*T: EVERY SINGLE SOLITARY SQUARE *IS* THRE
Feb-17-12
Premium Chessgames Member
  notyetagm: PGN

[Event "Aeroflot Open"]
[Site "Moscow RUS"]
[Date "2012.02.10"]
[EventDate "2012.02.07"]
[Round "4"]
[Result "1/2-1/2"]
[White "Ian Nepomniachtchi"]
[Black "Yaroslav Zherebukh"]
[ECO "B90"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "80"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 O-O 9. O-O Be6 10. Qe2 Nc6 11. Rfd1 Qc7 12. Bb3 Na5 13. Nd5 Nxd5 14. Bxd5 Nc4 15. c3 Rac8 16. a4 Kh8 17. Rac1 Bxd5 18. Rxd5 f5 19. exf5 Qc6 20. Rcd1 Rxf5 21. a5 Qa4 22. Bb6 Rcf8 23. b4 Nxb6 24. axb6 Rf4 25. h3 Qc6 26. Qe3 h6 27. R1d3 R8f7 28. Nd2 Rxf2 29. Ne4 Ra2 30. c4 Qxc4 31. Nxd6 Bxd6 32. Rxd6 Qh4 33. Qg3 Qxg3 34. Rxg3 Rb2 35. Rg4 Rf4 36. Rg3 Rd4 37. Re6 Rd7 38. Rg4 Rd4 39. Rg3 Rd7 40. Rg4 Rd4 1/2-1/2

Feb-17-12
Premium Chessgames Member
  notyetagm: Game Collection: OVERLOADED: FIRST DEFENDER: GEOMETRY
Feb-17-12
Premium Chessgames Member
  notyetagm: Game Collection: OVERLOADED: FIRST DEFENDER: PRECEDENCE

NOT!!!

Feb-17-12  master of defence: What happens after 36... Rxb4? For me is the best for black in this move.
Feb-17-12
Premium Chessgames Member
  Phony Benoni: <master of defence: What happens after 36... Rxb4? For me is the best for black in this move.>


click for larger view

You didn't specify which Black rook takes on b4, but I don't think it makes a difference. Let's assume <36...Rbxb4 37.Rd8+ Kh7 38.Rd7>


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White threatens mate in three with 39.Rdxg7+ Kh8 40.Rg8+ Kh7 41.R3g7#. Black can't push the pinned g-pawn to stop this, and 38...Rf8 39.Rgxg7+ is the same mate the other way around.

That leaves either 38...h5, which grants White at least an immediate perpetual check, or a king move. 38...Kh8 just repeats, while 38...Kg8 39.Rgxg7+ Kf8 40.Rxb7 evens the material with a passed b-pawn and doubled rooks on the seventh.

White has at least a draw in all of these lines, and is justified in trying for more.

Feb-20-12
Premium Chessgames Member
  notyetagm: Game Collection: BALEFUL INFLUENCE: every single square attacked
Feb-20-12
Premium Chessgames Member
  notyetagm: Game Collection: ESSS*I*T: EVERY SINGLE SOLITARY SQUARE *IS* THRE

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