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Alexander Shabalov vs Jorge E Sammour-Hasbun
US Chess Championship (2013), St Louis, MO USA, rd 2, May-04
Semi-Slav Defense: General (D43)  ·  1-0



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Kibitzer's Corner
Premium Chessgames Member
  chancho: Jorge got stomped again.
May-04-13  The Last Straw: Black blundered away a won game with 24...♘d5??
May-04-13  The Last Straw: 24...♕xb2 was simply winning.
Premium Chessgames Member
  Gilmoy: <14..c5> starts a waterfall like Botvinnik System. Black almost gets Smullyan pawns! Fun exercise: after <The Last Straw: 24..Qxb2>, see if both sides can collude to queen the e-pawn on a1.

Actually, 24..Qxb2 exposes Black to the Bf6-Qh6 threat. White needs one tempo free of the Nd5 defense, but can basically sac everything else(!). Hence 25.Ne5 <Δ 26.Qxf7+ Kh8 27.Bf6#, so Black has no time to trade Bs> Rxe5 26.Rxe5! <you can have the Nb1 with check, your Q still can't stop the mate> Doodling quickly: 26..Qxb1+ 27.Kh2 <I think 27.Bf1 Nd3 and Black has just enough time to steal the Re5, and then Nf3+ kills> Bxg2 <mate threat!> 28.Kxg2[] Nd3 29.Qh6 <have a Rook> Nxe5 30.Bf6 Qe4+ 31.Kh2! <now the N can only get in the way> Nf3+ 32.Kg3 and Black's material isn't helping:

click for larger view

So OK, maybe silicon isn't impressed. But OTB, Hasbun may have judged it too scary.

May-04-13  Shams: Black's pawn bulldozer deserved a better fate.
May-04-13  Blunderdome: Yeah -- hard to believe black is worse after 18.Nb1.
May-04-13  Blunderdome: According to the engines, black is winning up through 24...Nd5?

24...Qxb2 is strongest.

May-04-13  superstoned: Nice post, as usual, <Gilmoy>! I always try and get the botvinnik semi-slav when facing 1.d4. tis my favorite opening, in fact I'll play it as White too!
Premium Chessgames Member
  whiteshark: <Gilmoy> Loo♔ at the diagram I think <32...Qe5+> is the final resource for black <33.Bxe5 Nxe5> and at first glance Black's pawns seem unstoppable to me. <34.f4 Nd3 35.f5> The last try (idea f6/Qg7#) <35...Kh8> (defending idea 36.f6 Rg8)

Well my capacity limit is stretched to the max here.

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