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Vasyl Ivanchuk vs Anna Muzychuk
Gibraltar Masters (2013), La Caleta GIB, rd 9, Jan-30
Sicilian Defense: Lasker-Pelikan. Sveshnikov Variation Chelyabinsk Variation (B33)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Jan-31-13
Premium Chessgames Member
  HeMateMe: nice tactical play against the weak e6 pawn.

White will play 40. Q-e8+, 41. Q x e6+ and 42. N x e5, winning with a Knight capture on f7 or g6.

Feb-03-13
Premium Chessgames Member
  kingscrusher: If rf7 then qxf7 looks good for nxe5
Feb-03-13  Gilmoy: <kingscrusher: 41..Rf7 42.Qxf7> Cute, and clearly wins -- but somewhat hasty. Black's pinned Rf7 isn't going anywhere, and his Ne4 is hanging.

<HeMateMe: 42.Nxe5> Qc7 43.fxe4 and you still get the R. 43..Kf8[] <..dxe4?? 44.Rf2 gets the R for free> and then liquidate.

If you see a fork that wins an R, sit on your hands and maybe win the R+N!

Feb-03-13  Gilmoy: 42.Nxe5 plans to eat the Ne4. This prunes away later complications (by essentially trading the Ns away), at the cost of possible complications now.

So look for Qc4/Ne4 desperados. The Q has nothing, and the N has no checks. But 42..Ng5 is quite annoying: "saves" itself, defends Rf7, and <mutual threat> to Qe6 (while Black's Qc4 is even protected).


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White unravels the mutual threat by <checking out>: 43.Qe8+ Rf8 44.Qe7 <fork> and now any interposition gets mated (Rf7 => 46.Qe8#; or Nf7 45.Qf6), so 44..Nxf3+ 45.Nxf3 and Black has no time to recapture. Now the Rf7 interposition just lets White restore the same configuration minus Black's N, so 45..Qc3 <sees-g7> 46.Ng5 Qh8 <sees-g7/h7> 47.Qe6+.

A lot of work to "prove" that White really does get the Ne4 for free. Lift butt and restore blood flow to hands :)

Feb-04-13
Premium Chessgames Member
  kingscrusher: <Gilmoy> Honestly I didn't check with an engine but being a rook up is surely enough to win from this position


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Feb-04-13
Premium Chessgames Member
  kingscrusher: Qxf7 is absolutely the most simple, but checking with an engine, sure Qe8+ after Rf7 is the top engine choice:


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Analysis by Houdini 3 w32:

1. (#11): 40.Qe8+ Rf8 41.Qxe6+ Rf7 42.fxe4 Kf8 43.Rb2 Qc7 44.Nxe5 Qb7 45.Rxb7 Rxb7 46.exd5 g5 47.Nd7+ Rxd7 48.Qxd7 g4 49.d6 Kg8 50.Qg7# 2. (#13): 40.Qd8+ Rf8 41.Qd7 Rf7 42.Qe8+ Rf8 43.Qxe6+ Rf7 44.fxe4 Kf8 45.Rb2 Qc7 46.Nxe5 Qb7 47.Rxb7 Rxb7 48.exd5 g5 49.Nd7+ Rxd7 50.Qxd7 g4 51.d6 Kg8 52.Qg7# 3. (8.76): 40.Qxe6 Qc7 41.fxe4 Qe7 42.Qxe7 Rxe7 43.exd5 Ra7 44.Nxe5 Re7 45.Re2 g5 46.d6 Re6 47.d7 Rxh6+ 48.Kg2 Rd6 49.Rf2 g4 50.Nxg4 Kg7 51.Ne5 Rd1 52.Rf7+ Kh6 53.a4 Kg5 54.a5 4. (6.56): 40.Qxf7+ Kxf7 41.Nxe5+ Kf6 42.Nxc4 Ng5 43.Nd2 Ke7 44.a4 Kd6 45.a5 Kc5 46.f4 Nf7 47.Re2 Kb5 48.Rxe6 Kxa5 49.Kg2 Kb5 50.Re7 Nxh6 51.Rxh7 Nf5 52.Kf3

A win is a win though... it doesn't matter to pick the absolutely most accurate move, as +6 advantage is usually enough!

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