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Tjomme Klop vs Daniil Kolodkin
Leiden (2013), Leiden NED, rd 2, Jul-13
Gruenfeld Defense: Three Knights Variation. Petrosian System (D91)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 2 ·  Later Kibitzing>
Sep-09-13  Patriot: 21.Qxh6+ Kxh6 22.Nf7+
Sep-09-13  Bartimaeus: Though quantitatively equal, there's a striking difference in terms of the quality of the two armies. White is far ahead in development while most of Black's army is still in the stables. More importantly Black's king is quite exposed and subject to attack from different pieces. Being a Monday, queen sac seems the natural candidate to begin with and it yields the desired effect here.

21. Qxh6+ Kxh6 (Kg8 will soon lead to mate) 22. Nf7+ Kg7 23. Nxd8 and white is up a piece with a much better position.

Sep-09-13
Premium Chessgames Member
  scutigera: Of course, it isn't really over until 23 .. Kf8 24 exd5 securing the knight's escape. It seems strange that nothing more forceful is available in the initial position, though, given Black's woeful lack of development; even after the combo, with Black's only developed piece being his king, White has no obvious better line than consolidation and a sumo-style exploitation of material advantage. Although better lines might be obvious to a better player than I am.
Sep-09-13
Premium Chessgames Member
  FSR: What everyone said.
Sep-09-13
Premium Chessgames Member
  FSR: I would play 8...h6! to avoid this sort of thing. Opening Explorer
Sep-09-13  M.Hassan: 21.Qxh6+ Kxh6
22.Nf7+
Royal fork. White becomes a piece up.
Sep-09-13  lost in space: I love Mondays!

21. Qxh6+ Kxh6 22. Nxf7+ and white will be a piece up.

Sep-09-13
Premium Chessgames Member
  offramp: 13...g5 is such a wacky move.
Sep-09-13  Abdel Irada: This variation of the Grünfeld should not turn out so well for White. I've done quite well with this line as Black, although of course I never played 13. ...g5?!

According to Hoyle, Black should continue here with the safe, solid 13. ...c6, although I must confess that I never followed this prescription. Since White has castled long, I have found good counterplay starting with the sharp 13. ...c5. (Of course, my opponents have also never taken up the challenge with 14. dxc5, perhaps fearing the fracturing of their queenside pawns with 14. ...Bxc3, although it is the only real bid for a refutation. Therefore, please don't regard this as a recommendation for 13. ...c5.)

Sep-09-13  agb2002: White has a bishop and a knight for the bishop pair.

Black threatens 21... fxe5.

The knight on e5 is so close to Black's royal family as to suggest the possibility of a fork. Hence, 21.Qxh6+ Kxh6 (21... Kg8 22.Qg6+ and mate next) 22.Nf7+ Kg7 23.Nxd8

A) 23... Kf8 24.Nxd5 a6 (24... Na6 25.Bxa6 bxa6 26.Nxc6, etc.) 25.Nxc7 Ra7 26.Nde6+, etc.

B) 23... c6 24.exd5 Kf8 (24... cxd5 25.Nxd5 as in A) 25.dxc6 bxc6 26.d5 cxd5 27.Rxd5 followed by Bb5 or Bc4 to let the knight escape through c6 or f7.

Sep-09-13  mistreaver: Monday. White to play. Very Easy. 21.?
21 Qxh6+ Kxh6
22 Nf7+
leaves white a piece up.
Long live the Mondays.
Sep-09-13  Gilmoy: <scutigera: 23..Kf8 24.exd5 securing the knight's escape.> Heck with that! 24.Nxd5 and now Ke8 drops an exchange. Thereafter, Black can't also trap the QN because White always has Rc1 and e5 booting out any Nc6 shield, after which Nc7 escapes.

Black can't even defend c7: 24..Na6 25.Bxa6 bxa6 <deflected from c6> 26.Nxc7 Rb8 27.Nc6 and d5-d6-d7 etc.

Black's "best" line might be 24..Nc6 25.Nxc7 Rb8 26.Nxc6 bxc6, down N+PP with no compensation.

Sep-09-13  morfishine: <21.Qxh6+ Kxh6 22.Nf7+> and White wins a piece

*****

Sep-09-13  SamAtoms1980: On Monday we're usually out to win the king. This week I'll settle for a bishop.
Sep-09-13  stacase: Free Bishop, took about 5 seconds. What's not to like about Monday puzzles?
Sep-09-13  TheaN: Monday 9 September 2013

<21.?>

Welcome, to the tale of the Box of Vision and chess blindness in patterns.

The Box of Vision, an entity for which its sole purpose is to misguide an experienced chess puzzle solver into patterns that might not hold on every timeline of the battlefield. An entity that watches over a solved puzzle with a deception that is utterly destructive of nature. No, it does not always work best as the Box says, but that does not matter.

In a land very, very closeby, The Box starts its journey. The White Solver spots the key manouver in this war of ancient pieces, whom are oblivious to the existence of the Box. A <royal fork> enters the Box and fills it up at the extent of <21.Qxh6+ Kxh6 22.Nf7+ with 23.Nxd8 > Now the Box pulses its <royal fork> to the White Solver, whom readily adds <21.Qxh6+ <(Kg8 22.Qh8+?! Kxh8 23.Nf7+ etc)> Kxh6 22.Nf7+ with 23.Nxd8 > to the answer. Wait... 22.Qh8+?. The Box of Vision nods in agreement.

When the White Solver considers 22.Qg6+ the Box goes in denial. Heavily pulsing <royal fork> the White Solver is clouded and concludes <21.Qxh6+ <(Kg8 22.Qh6+ Kh8? 23.Nf7#> Kxh6 22.Nf7+ with 23.Nxd8 >. The Box calms down. Despite checkmate, the <royal fork> is on the board in at least one variation.

The Box goes insane when the White Solver considers black's other defense on Qg6+. <21.Qxh6+ Kg8 22.Qg6+ Kf8>. With agonizing pain and erred vision the White Solver abandons the variation. Not fed by a <royal fork>, the Box of Vision is on the verge of finishing off the mere existence of the White Solver. The White Solver, in order to conclude the war, settles on <21.Qxh6+ <(Kg8 22.Qh8+?! Kxh8 23.Nf7+ etc)> Kxh6 22.Nf7+ with 23.Nxd8 >. The Box of Vision releases the <royal fork> and dissipates. The battle is over, White has won.

As he walks away, the mind of the White Solver clears. He looks back to the battlefield in denial. As he continues his pace, he mumbles "23.Qf7#". A skincrawling scream of the Box of Vision arises from the clouds as the White Solver slowly walks away.

Sep-09-13  Nick46: <morfishine: <21.Qxh6+ Kxh6 22.Nf7+> and White wins a piece> Not only this, but black's mobility is more up s... creek than ever.
Sep-09-13  cocker: According to Fritz, the best move is 21 ♘f7. This gives White a strong attack with the queens still on.
Sep-09-13
Premium Chessgames Member
  Dionysius1: Hi <Cocker>. After 21…Kxf7 22 Qxh6 Qg8 how would white continue the attack? The black queen seems to guard the white queen’s entry squares, and white will take a while to bring up reinforcements surely? 23 Nxd5 Nd7 and I can’t see anything immediate. I’d probably rather have the bishop.
Sep-09-13
Premium Chessgames Member
  offramp: <cocker: According to Fritz, the best move is 21 Nf7.>

Having looked at it, Fritz seems to be right.

<Dionysius1: Hi <Cocker>. After 21…Kxf7 22 Qxh6 Qg8 how would white continue the attack? The black queen seems to guard the white queen’s entry squares, and white will take a while to bring up reinforcements surely? 23 Nxd5 Nd7 and I can’t see anything immediate.>

After 21.Nf7 Kxf7 22.Qxh6 Qg8 23.Nxd5 Nd7 I would continue 24.Bc4 when black really is in terrible trouble.

Sep-09-13
Premium Chessgames Member
  Dionysius1: Yes indeed!
Sep-09-13  Oxspawn: Nice of Kolodkin to leave half the team in the changing room. 21 Qxh6+ Kxh6,
22 Nf6+ followed by Nxd8 and black seems doomed.
If 21 …. Kg8
22. Qg6+ followed by mate on f7 with the queen if the king goes to f8 and mate on f7 with the knight if the king goes to h8. Is it just me or have Mondays got more interesting
Sep-09-13  psmith: <cocker> and <offramp> Both moves win. 21. Nf7 wins more quickly but requires more foresight from the White player, so 21. Qxh6+ is the one almost any human would play.
Sep-09-13  psmith: For that matter, it looks like 21. Bd3 (idea of 22. Rh1) and 21. Nxg4 are also winning, according to Fritz.
Sep-09-13  YetAnotherAmateur: The joys of Monday queen sacs:
21. Qxh6+ Kxh6
22. Nf6+ wins back the queen.

Refusing the sac makes things worse:
21. Qxh6+ Kg8
22. Qg6+ and black is doomed.

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