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Alexander Areshchenko vs Fidel Corrales Jimenez
World Cup (2009), Khanty-Mansiysk RUS, rd 1, Nov-21
Sicilian Defense: Dragon Variation. Yugoslav Attack (B77)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
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Nov-27-09
Premium Chessgames Member
  patzer2: For today's Black Friday puzzle we were treated to a recent slugfest from the FIDE World cup, where both sides castled on opposite wings and raced to see who could mate first in a wild Sicilian Dragon.

White should have allowed the game to end in a draw with 27. Bg5 when Black would likely have claimed the draw by three-fold repetition with 27...Bg7 =. Instead he played 27. Rhg1+? when Black could have won after 27. Rhg1+? Kh7 28. Qf4 axb3 29. axb3 with the amazing obstruction sacrifice 29...Bg4!! (as previously noted by <Eyal>).

Indeed, after 29...Bg4!! 30. fxg4 Ra8 31. Bg7 Rg5! 32. e5 Qa5 Black, with a pair of obstruction sacrifices to defend his King and a mating attack underway on the opposite wing, is clearly winning.

Failing to find 29...Bg4!!, Black is lost after 29...Qa6? 30. Bg7! . Yes, today's puzzle solution and winning demolition with 33. Ne6+! is actually a follow-up to a mating attack and pursuit (King hunt) combination which began with 30. Bg7!

Nov-27-09
Premium Chessgames Member
  patzer2: To demonstrate that 30. Bg7! (along with the followup and puzzle solution 33. Ne6+!) initiated a deep pursuit (King Hunt) mating combination, note the final position of the game.

After 38. fxe7+ (final move of the game), the King pursuit might well have continued 38...Ke6 39. Qf5+ Kd6 40. Rd1+ Kc7 41. Qd7+ Kb6 42. Rd6+ Ka5 43. Qa7+ Kb4 44. Rb6#.

Nov-27-09  SufferingBruin: 1000 rating, trying to get better.

So there was this bus I had to catch. I sprinted as fast as my 46-year old knees would sprint and for a moment, I felt young. It was no more than a couple of dozen strides but for a brief time, every part of the body was moving in sync, each stride seemed to pull me closer to a moving vehicle toward me. It was, in a word, exhilarating. Then, sweat poured into my eyes, blinding me. My stride stiffened, I gasped to a halt and watched the bus drive away, each intake of breath providing more diesel exhaust for my burning lungs. Soaked with sweat, every fiber of my being screaming in pain, I asked what my body was asking: "Why the hell did I put in the effort?"

This is all I could come up with to describe just how badly I missed this problem.

Nov-27-09  sh8911: 33.Ne6+ pxe6 34.pxg4 white can push g pawn
Nov-28-09  dufferps: Like Vincent L, I was guessing 33 Nf5+. I was thinking (probably shortsightedly) that at worst I would trade my Knight for the black rook. Better, I could pin black's king until my pawn opened the g file.

I was amazed when I saw white moved 33 Ne6+. I thought surely black would capture the knight with f7xe6. Later, I played out some scenarios with 33 ... f7xe6. No matter what black did (Qa3 or Rf8 or Rg8), white opened the g file and bottled up and soon mated the black King.

I'm a long way from seeing that far ahead even when taking a long time to study the options, let alone in the pace and heat of a game.

Nov-28-09
Premium Chessgames Member
  Once: <SufferingBruin> Now that was seriously funny and well written! Thanks for giving me a chuckle.
Nov-28-09  Eduardo Leon: Now after looking at the position for 15 (!) minutes, I understand Eyal's suggestion <29...♗g4!!>. Black first ensures white won't create any further trouble in the kingside for at least two moves, and <only then> proceeds to double his ♕ and ♖ (the one in the 8th rank) in the a file.
Nov-18-18
Premium Chessgames Member
  al wazir: I went for 30. Rg7+. After 30...Bxg7 31. Qxf7 Rg8 32. Rg1 Bg4 33. Ne6 Rg8 34. fxg4 hxg4 35. Rxg4, black is finished.

But 30...Kh8 seems to stymie my attack.

Nov-18-18
Premium Chessgames Member
  An Englishman: Good Evening: A bit surprised to have solved this one. Then again, White has landed in desperate trouble, and perhaps desperate moves are easier to spot in desperate times.
Nov-18-18
Premium Chessgames Member
  jith1207: I tried following line, thought it also led to mate.

31. Qxf7 Rg8 32. Nf5 Bxf5 33. Qxh5+ Bh6 34. Qf7+ Bg7 35. exf5 Qa3 36. Qg6+ Kh8 37. Qh5+ Bh6 38. Qxh6#

But upon checking engines, it is clear that 32..Rxf5 and 33..Be8 only lead to White clinging on to a draw through repetition.

Nov-18-18  Walter Glattke: 30.Rxg7+.Kh8 31.Rxf7 Qa3 32.Qc1 Ra5 33.Qxa3 Rxa3 could get draw. 30.Bg7 threatens Qh6 mating.
Nov-18-18  JimmyRockHound: That was nice.
Nov-18-18  gofer: Black threatens mate in two starting with <30 ... Ra8>, <30 ... Qa3> and <30 ... Ra5>, so whatever white does it has to be pretty spectacular and it has to be forcing.

So what is it?!?!

30 Rg7+ Kh7 -+

Nope...

<30 Bg7! ...>

That looks more promising!!! White threatens 31 Qh6+ Kg8 32 Qh8#

<30 ... Bxg7>

<31 Rxg7+ Kxg7>

<32 Rg1+ ...>

32 ... Kh7/Kf8 33 Qh6#

32 ... Kh7 33 Qxf7+ Kh6/Kh8 34 Qg7#

<32 ... Bg4!>

Desperate, but less desperate than Qa1+ or Rg5

<33 Ne6+!!! ...>

White stops the king from having an escape square via f8, but also puts another pawn between Qa6 and g6! So the knight sacrifice is completely justified.

33 ... Kh7 34 Qxf7+ Kh6/Kh8 35 Qg7#

33 ... Kh8 33 Qh6#

33 ... Kg6/Kg8 34 fxg4 +-

<33 ... fxe6>
<34 fxg4 ...>

Okay the king is now feeling VERY isolated with a discovered check on its way...


click for larger view

I think the tables have turned, black still has all the mate in two threats, but doesn't have the tempo free to execute any of them!!! Black is still desperate...

34 ... Kh7
35 Qf7+ Kh8 (Kh6 36 g5+ Rxg5 37 hxg5#)
36 Qxe8+ mating

34 ... Kh8
35 Qh6+ Kg8
36 gxh5+ mating

~~~

Okay, nearly right, black decided accepting the knight sacrifice was a really bad idea, which it does seem to be, and instead played f6! which holds on for a bit longer.

Nov-18-18
Premium Chessgames Member
  FSR: Very nice. I saw the first three moves, but missed 33.Ne6+!!
Nov-18-18  saturn2: Black has mate in two on the a file but white has the g file and comes first.

I saw this till 32.Rg1+ Bg4
and would have continued
33.fxg4

Nov-18-18  saturn2: <Eyal> in 2009 gave a reason why it is a Sunday puzzle I did not solve.
Nov-18-18
Premium Chessgames Member
  malt: 30.Bg7 B:g7 31.R:g7+! K:g7 32.Rg1+ Bg4
33.fg4 e6 34.gh5+ Kf8 35.Rf1 Rc7
looks drawing, did not see 33.Ne6!
Nov-18-18
Premium Chessgames Member
  agb2002: I had the impression this was another recycled puzzle.
Nov-18-18
Premium Chessgames Member
  Richard Taylor: <FSR: Very nice. I saw the first three moves, but missed 33.Ne6+!!> I missed that also. I think if I had studied it more I would have seen that but just spent a few minutes on it. Ne6+ clears f7. It was a good combination for sure.
Nov-18-18
Premium Chessgames Member
  Diocletian: Got this one immediately because, 1 it's a puzzle, 2 the first move threatens mate, then the next few moves are easy.
Nov-18-18
Premium Chessgames Member
  Breunor: Here's a thread where we had the old Chrisowen post a 'normal' post in 2009.

For me, I couldn't even get the first move. What a marvelous game!

Nov-18-18
Premium Chessgames Member
  ChessHigherCat: Well, some of the earlier puzzles this week may have been too easy but this one was definitely insane.
Nov-18-18
Premium Chessgames Member
  ChessHigherCat: <Nov-27-09
johnlspouge: Friday (Difficult)
Areshchenko vs F Corrales Jimenez, 2009 (33.?)
White to play and win.>

This was a typical Friday puzzle in 2009???

Nov-18-18  Cheapo by the Dozen: I didn't see the ... Bg4 interposition, so I solved only a small part of the problem.

That said, I quickly saw why Rg7+ appeared to work, but took much longer to see that the less immediately forcing Bg7 was actually more threatening.

Nov-18-18
Premium Chessgames Member
  DarthStapler: I got the first move.
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