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Bozidar Ivanovic vs Kemal Osmanovic
Sarajevo (1983)
Sicilian Defense: Najdorf Variation (B90)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Apr-23-13  mcMaya2: Qe7 is still playable
Apr-23-13  mistreaver: Tuesday.White to play.Easy.35?
White can easily win with what i think is known as windmill: 35 Qxg7+! Bxg7
36 Rxg7+ Kh8
37 Rxf7+ Kg8
38 Rxb7
and white is a piece up.
Apr-23-13  Cybe: Phony Benoni: It's tempting to go for mate with <35.Qxg7+ Bxg7 36.Rxg7+ Kh8 37.Ng4>

If 37. Ng4, 37... Qe7!

Apr-23-13  The HeavenSmile: It's not really a windmill though is it, just a discovered attack once the rook is moved. I think a windmill tactic needs to have at least 2 checks in it
Apr-23-13  Murphyman: I agree with The Heavensmile.

A piece which cannot defend the g7 square would have to be sittingon f8 to prevent the black king from having his choice of f8 or h8.

In a true windmill black would be forced back on to h8 after the Rg7+s. In a true windmill white would pick up the queen and then the rook on c8.

That said its the windmill idea which I think helps with the pattern recognition in solving this puzzle (for those who didn't try to find a mate)

Apr-23-13
Premium Chessgames Member
  chrisowen: Heaving governed credible the crown 35.Qxg7+

jewel at he plays for g7 queen of fashion delicate,

rook winding up low again first finger in black would take one for 2c or it a scope rain on his parade g7 up ply it a tale of two novices in b5 and rc8 allow crooked grounds I think good game,

maladroit a nb5 in the vale got to 32...Rxc2

Apr-23-13  alexrawlings: Earlier in the game, after <29 f4>, shouldn't black just play <29.. Nxe4?> Is there a tactic I've missed?
Apr-23-13  abuzic: Excerpt from: "The Tales of a Silicone Scholar" by Rybka® ……………….
Move <34….♖a3>:
My King frowned in amusement, looked at me with a smile and said: "I am sure you found a way winning by sacking my Queen". He stared deeply into my eyes while whispering: "But as you know I love my Queen. Can you find another way to win while saving her"?

"He spoiled my moment.." I thought; " As always, your majesty read my thoughts, <35.♕g7+> of course" I replied with a humble gesture

I looked at the battlefield,
<35.♕xg7+ ♗xg7 36.♖xg7+ ♔h8 37.♖xf7+ ♔g8 38.♖xb2>,

a nice winning sacrifice, the stakes are high: 6 something!; but.... his majesty's wishes are orders

I looked again and glimpsed something. "I think there is another way to win saving our Queen for the moment, and we will rely on our loyal soldier ♙ on c2 or our honorable knight ♘ on f2" I replied trying to hide my frustration. "The stakes are not as high: 5 something, and I cannot promise what will be our enemy's response"

I was hoping our opponent will not force me to later sac her majesty to continue the marsh to straight win. He nodded his head to go ahead. Did he see what I foresaw?

I passed the little soldier ♙c2 to c3

Move <35.♙c3>:
"Now I see why you cannot keep your promise for sure,

<35…♖axc3> and you have to sac <36.♕xg7+> "said my king as if tapping on my back (I do not have one) in sympathy

Move <35…♙g6>:
He winked at me with a wily smile, as if implying: "You do not have to sac Her" I understood

The battle continued:
<36.♙f5 ♙exf5 37.♙exf5 ♙g5 38.♗xg5>


click for larger view

Our opponent's face became bloodless, then black, then tried to mimic a smile with his dry lips surrendering his forces

Epilogue:
His majesty was joyful and handed me a kiss. He asked wickedly: "How would our honorable ♘ on f2 have done the job?"

I explained briefly the main plan:
<35.♘d3 ♖xc2 36.♖ee3 ♔g8 37.♗xg7 ♙f5 38.♙exf5 ♗xg7 39.♖xe6> again saving our Queen

His majesty raised his thumb, implying he too had seen this too!!

Apr-23-13  abuzic: <alexrawlings: Earlier in the game, after <29 f4>, shouldn't black just play <29.. Nxe4?> Is there a tactic I've missed?>

if 29...Nxe4 30.Nxe4 Qxe4 then 31.Bb6 Qc6 32.Bxd8

29...Ra3 was OK, but not 30...Ra2, 30...Rc8 was more accurate if 31.Bd4 Bf8 keeping black's initiative

Apr-23-13  snakebyt: <Bartimaeus:> "Fructify" has got to be the word of the day. ;-)
Apr-23-13  bachiller: <Abdel Irada> has chosen the best day for mentioning Don Quijote, as Cervantes died on April 23rd 1616 (and so did Shakespeare, according to folklore knowledge, though both dates might be wrong).

Happy Book Day to lovers of literature.

Apr-23-13  MountainMatt: Doesn't 35. Bxg7 work just as well? No one else has said as much, so I'm probably wrong...but all the lines I've looked at lead to the same result as the queen sac - either the win of a piece and pawn or mate. What have I missed?
Apr-23-13
Premium Chessgames Member
  Phony Benoni: <MountainMatt> After <35.Bxg7>:


click for larger view

Black wins a piece with <35...Rxg3> followed by <36...Bxg7>.

Apr-23-13  James D Flynn: Material ly Black is a pawn up but White pieces are pointing menacingly at the Black castled K-side. 35.Qxg7+ Bxg7 36.Rxg7+ Kh8 37.Rxf7+ Kg8 38.Rxb7(White has won a piece and 2 pawns and threatens the Black N on b5. White is now a piece and a pawn The attacked N has only th square c3 blocking the attack on the c2 pawn and allowing Rxb4) Ra5 39.Ng4 h5 40.Nh6+ Kf8 41.Rb1(the R on c1 is tied to the back rank to defend against Rb8+) Ke8 42.Rxb4 Na3 43.Re7+ Kf8(not Kd8 44.Nf7#)44.Rbb7there is no answer to the threat of 45.Rf7+ Re8 46.Rbe7+ Kd8 47.Rf8#. White can also aim for mate by 35.Qxg7+ Bxg7 36.Rxg7+ Kh8 37.Ng4(threat 38.Rg6+ Kh7 39.Rxh6+ Kg8 40.Rh8#) Qe7 38.e5(if Rg6+ Qxf6 39.Rxf6 h5 40.Rh6+ Kg7 41.Rxh5 Nd4 the pawn on c2 will fall restoring material equality . Black now has a dangerous passé pawn on b4 and the white R on h5 can play no part in stopping the pawn) Qxf6 39.exf6 Rxc2 40.Nxh6 Ra7 41.Nxf7+ Rxf7 42.Rxf7 b3 43.Rb7 Nd4(threat Nf3+ winning the Ron e1) 44.Rb1 e5 and Black will create a second passed pawn which compensates for the exchange deficit.
Apr-23-13  MiCrooks: This is worse than simply being a piece and a pawn down (bad enough, eh?!) With the Knight coming to g4/h6 and the Rook on the 7th Black needs to always be wary of his weak back rank. He thus has no play at all.

For example, Rxc2 (after Rxb7) seems reasonable taking the pawn back and threatening the Knight at the same time. White could win by trading Knights and taking the b-pawn, but much easier is Ng4! as this just rushes the Knight to the attack and wins back the pawn to boot as Black's Knight is now hanging. Nc7 Nxh6+ and Black is in deep doodoo :) White needn't hurry either since Black has no real counterplay. Black is barely avoiding being mated here. Both Kh7 Ng4 walking into the pin and Kf8 f5! Advancing the pawns and opening lines for the other Rook are hopeless for Black. For example, Raa2 to double Rooks in the last line fails simply to fxe6. After Rxg2+ Kh1 Black is still in deep trouble.

Apr-23-13  gofer: Hold on a minute...

I have been dabbling against <Crafty EGT> and think I may have found an improvement over the queen sacrifice!!!

http://www.chessvideos.tv/endgame-t...

<35 Nd3! ...>

The poor silicon beast is tamed...

<35 ... Kg8?>
<36 f5! ...>

The black king is being enclosed...

<36 ... h5>
<37 Qxh5 ...>

Black gives up its queen !!!

<37 ... Qe7????>

Apr-23-13
Premium Chessgames Member
  kevin86: The coming discovered check gains back the queen to leave white a piece ahead.
Apr-23-13  pericles of athens: bam bam bam - and I'm 2 for 2 this week. The rook on the 7th is the killer.

If the game were played out, it would look a bit like the "see-saw" check included in Chernev's "Most Instructive..." (can't recall specifically the game I'm referring to, at work right now, does anyone recall this game?).

Apr-23-13  kramputz: You <MiCrooks> talk too much & think little.
Apr-23-13  geeker: Saw the basic idea very quickly. Thought at first it'd be a full-blown windmill, but just a "mundane" win of a piece!
Apr-23-13
Premium Chessgames Member
  Phony Benoni: <pericles of athens> I believe you're thinking of this game: A Kupferstich vs J Andreassen, 1953
Apr-23-13  Conrad93: It's not a windmill. It's just a simple discovered check that wins a piece, but the win for white is a bit obvious. He's up a piece and has a rook on the seventh file.
Apr-23-13
Premium Chessgames Member
  thegoodanarchist: Darn! I should have looked one move further. A common mistake of mine. Yes, one move further and I see rook takes f-pawn check, followed by collecting the Black queen.... So sorry...
Apr-24-13  pericles of athens: <phony benoni> thanks, this is exactly the game it reminded me of. sure, they're not identical, but in general...
Apr-24-13  Conrad93: <<phony benoni> thanks, this is exactly the game it reminded me of. sure, they're not identical, but in general...>

It's a similar tactical motif.

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