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Antoaneta Stefanova vs Yifan Hou
FIDE Women Grand Prix (2010), Ulaanbaatar MGL, rd 11, Aug-11
English Opening: Agincourt Defense. Neo Catalan Declined (A14)  ·  1/2-1/2

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Aug-11-10  jhoro: 29.Bxf6 winning a pawn was a nice tactic that Stefanova should have calculated.


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Hou can't take 29...Rxf6 because after 30.Rc2 the black Queen would be lost (leaving the 7-th leads to mate or she'd drop the rook on c8 otherwise)


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Aug-11-10  s4life: <jhoro> In your line, wouldn't the pawn be won back after 29 .. Qc6?
Aug-11-10  jhoro: 29.Bxf6 Qc6 30.Bxf7 is very bad for black


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but even 30.Ba1/30.Bb2 is ok because if black takes on f3 g7 will be unprotected


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Aug-11-10  jhoro: computer thinks 29.Bxf6 Qb7 is best, but the f3 pawn is still untouchable
Aug-11-10  weisyschwarz: Quite a guarded effort by both, an arm wrestling draw.
Aug-12-10  xanadu: The strategy of taken the h4 pawn in move 15 seems not to be the best for Black...
Aug-12-10  YifanFan: Stefanova also missed 28. Qh3, which wins a piece and the game because of the weaknesses on Black's back rank and on her a2-g8 diagonal.

After 28. Qh3


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If Black tries to save the piece with 28...Re8 29. Rc1 Rxe3 30. Bxc3 and White wins a piece

If she tries 28...Re7 instead, then 29. e4 still wins a piece.

Moving the Knight just unleashes White's DSB:

28...Nb5 (or 28...Na4) 29. Bxf6 and wins

Likewise 28...f5 29. Rc1 and Black is dead, eg: 29...Qe5 (29...Rd7 30. Bxc3 Rxd2 Bxd2) 30. Rd3 Rfc7 31. Bxc3 still wins a piece.

Aug-12-10  jhoro: <YifanFan>, I saw the computer suggest this one, but it seemed to me much harder to spot.
Aug-13-10  xanadu: I watch the live transmission. Both players were in really big time troubles at this point (about 5 minutes for doing 15 moves) in the last and decisive game of the tournement; I think this explains Stefanova´s omissions.
Dec-21-15
Premium Chessgames Member
  Domdaniel: Played in Ulaanbaatar, Mongolia.
The first game in Delchev's book 'The Modern Reti'.

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