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Rustam Kasimdzhanov vs Ivan Cheparinov
FIDE Jermuk Grand Prix (2009), Jermuk ARM, rd 9, Aug-18
Semi-Slav Defense: Stoltz Variation (D45)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Aug-18-09  Ulhumbrus: 37 h5! is the move which overcomes the defence.

After 37 h5 the Black King can't take the h pawn as he is tied to the defence of the N on g7, and 37...gxh5 invites 38 Nf7+ when Black must give up a Rook for the N.

Aug-19-09  pulsar: 25...Ng3 looks interesting, if not messy:


click for larger view

Aug-19-09  Bons92: <pulsar> I don't think 25...Ng3 is so interesting. After 26.Bxf6+ Kxf6 27.hxg3!(not 27.Qxg3?? because 27...Qh1+ wins)Rxh3 28.Rxd5 Rxg3+ 29.Kf2 or 27...Qh1+ 28.Qxh1 Rxh1+ 29.Kf2 Rh2+ 30.Ke1 Rh1+ 31.Bf1
Aug-19-09  pulsar: <Bons92> Thank you for the lines. I didn't give lines in my earlier post because I didn't have enough time to analyze the position after 25...Ng3.

Looks like you gave an outright refutation. :)

Aug-19-09  outplayer: 17.g4 is a move i have seen sometimes in blitz games. i've never thought i would see this move in GM game.
Aug-19-09  JohnBoy: Certainly giving up a rook (wtih check) on ...40 was not the best. I prefer 39...Rxf7 40.gf7 a2 as a survival attempt.
Aug-19-09  Hidden Skillz: <JohnBoy> your line leads to mate or the loss of a knight. in any case, black is totally lost. unless i am missing something, i thought 40...Rg8 was the best try.
Aug-19-09  JohnBoy: <Hidden> - yeah, I suppose so. But let's be specific. 39...Rxf7 40.gf7 a2 41.Rd6+ and black is faced with an unpleasant choice:

either 41...Kh5 42.Be2+ Kh4 43.Rh6+ Nh5 44.Rxh5#,

or 41...Ne6 42.Re6+ Kg7 43.Re8 - and either the rooks come off and white queens first with a knight to the good and a mating attack, OR black queens and then white queens with check - and a mate soon to follow.

You are right.

BUT 40...Rg8 41.Be2+ Kh6 (41...Kh4 42.Rd1) 42.Ng4+ gets back the X and will pick up a black q-side pawn. White holds all the cards at move 39.

Aug-19-09
Premium Chessgames Member
  Peligroso Patzer: <JohnBoy: Certainly giving up a rook (wtih check) on ...40 was not the best. I prefer <39...Rxf7 40.gf7 a2> as a survival attempt.>

By moves 39 and 40, it really did not make much difference what Black played. For example, if (as suggested) 39...Rxf7 40.gxf7 a2 then White wins as follows: 41.Rd6+ Ne6 (41...Kh5 42.Be2+ Kh4 43.Rh6+ and MATE NEXT.) 42.Rxe6+ Kg7 (42...Kh5 43.Be2+ and MATE NEXT.) 43.Re8 Kxf7 (43...a1=Q 44.f8=Q#) 44.Rxa8 ]

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