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Artur Yusupov vs Vladimir Kovacevic
First Lady's Cup (1983), Indonesia, rd 2, Nov-14
Old Indian Defense: Normal Variation (A55)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jan-31-13  lost in space: I was not sure about the sequence:

Is 37. f5 and 38. Nf6+ better or 37. Nf6+ and 29. f5?

Have no time to solve that with my limited time and no support from a silicon monster

Jan-31-13  Kikoman: <37. Nf6+> Δ f5 Gotet!
Jan-31-13  Bartimaeus: A nice setup where White has a superior position and just needs to find the right way go for the kill. Nf6+ leaps out immediately. Two main options here :

37. Nf6+ Kh8 38. Rd8 Ree8 39. Nxe8 and now black has lost the rook and the attack continues

37. Nf6+ gxf6 38. exf6 Ree8 39. f5 and now the exposed king has mate threats from the Queen and Rook.

Choice between the devil and the deep sea; probably black throws in the towel at this stage.

I see black chose a variant of the second option but the result is unchanged.

Jan-31-13  patzer2: <36...Rf8?> Not an obvious mistake, but it is a decisive one which blocks the Black King's escape route from a mating web. Better are 36... Nb4 or 36...c4 =.

<37. Nf6+ !!> Demolition of pawn structure sham sacrifice forces 37...gxf6 38. exf6, when 38...Rd7 39. f5! (clearance) opens up a decisive mate threat.

From the final position, play might go 39...Rxd4 (39... Kh7 40. fxe6 Rxd4 41. Rxd4 Rg8 42. Be4+ Rg6 43. exf7 Qxf7 44. Bxg6+ ) 40. Rxd4 Bxf5 41. Qxh6 Qxg3 42. Rg4+ Bxg4 43. Qg7# 1-0

Jan-31-13  UnsoundHero: I like the line 39 f5 Rxd4 40 Rxd4 Bxf5 41 Qxh6 Qxg3 42 Rg4+. (Or, better yet, 42 Qxf8+ Kxf8 43 Rd8 mate).
Jan-31-13  Jamboree: latebishop: "Can the full combination really be that long?!"

No, actually, the last ten moves of your line are unnecessary. Instead of 42. Qxf8?, white mates in three with 42. Rg4+!!. If black's bishop then either takes the rook or interposes, it blocks the defense of g7, allowing mate in one 43. Qg7++. So black's only remaining move is 42. ... Qxg4, and after 43. hxg4 it is again mate in one.

Jan-31-13  M.Hassan: "Medium"
White to play 37.?
White is a pawn down

White attempts to open the g file which may have future advantage for him:

37.Nf6+ gxf6
38.exf6 Ree8
39.f5!
That opens the diagonal for Queen attack:
39..........Qxg3
40.Rg4+ Qxg4
41.hxg4 Bd5
42.Qxh6
And Black is mated next move.
Time to check

Jan-31-13  Abdel Irada: <<•>Once more unto the breach....<•>>

Dear friends, the war-blast has blown. 'Tis time, then, for our parfit gentle knight to imitate the action of the tiger, by his sacrifice teaching the enemy how to war.

And so it begins:

<<•> 37. Nf6†! ...>

Nor can the sacrifice be refused, though Black close the wall up with his Old Indian dead. The proof:

(a) 37. ...Kh8? 38. Rd8 .

There is no surviving this. To take the rook is to be mated; not to take is to lose his own.

<<•> 37. ...gxf6

38. exf6 ... >

To save the rook or not to save it? Black has four answers to consider.

<(1) 38. ...Ree8/Rc7
39. f5! >

This was the real point of the knight's sacrifice: Now, with a foot-soldier on f6 leading the charge across the battlements, the queen threatens a fatal incursion on h6.

All the defenses fail:

(a) 39. ...Qg3? 40. Rg4†, winning the queen.

(b) 39. ...Bd5 40. Qxh6, Bxg2† 41. Kh2!, leaving no follow-up check and no further way to delay the mate on g7.

(c) 39. ...Kh7 40. Rh4, and again mate is ineluctable.

<(2) 38. ...Rd7>

Black hopes to restore the balance by offering back a bishop, but White need have none of it.

<39. f5! >

Again this breach is lethal.

(a) 39. ...Rxd4 40. Rxd4, Bxf5 41. Qxh6, Qxg3 42. Rg4†! and mate is imminent.

(b) 39. ...Bxf5 40. Qxh6, Qxd1† (40. ...Qxg3 41. Rg4†) 41. Kh2! and again there is no defense.

(c) 39. ...Bd5 40. Qxh6, Bxg2† 41. Kh2!, winning as before.

<(3) 38. ...Bd5
39. fxe7, Bxg2†
40. Kxg2 >

White has a rook plus a far-advanced passed pawn for an errant knight. The battle is over.

<<•>(4) 38. ...Qxg3!? 39. fxe7, Bxh3
40. Rg1! >

Against so determined a siege, no defense will hold.

(a) 40. ...Bxg2† 41. Rxg2, winning the queen.

(b) 40. ...Kh8 41. exf8=Q†, winning easily by preponderance.

(c) 40. ...Kh7 41. Be4†, winning the queen.

Having disguised fair nature with hard-favour'd rage, White must win through, and all credit is due a knight modest, still and humble in peace, but whom the fortunes of war have lent an eye of terrible aspect.

Jan-31-13  morfishine: White is a pawn down, but his pieces are better organized and concentrated. No patterns, potential or immediate, are obvious. The Black Queen pressures f3 & g3 while the Black WSB pressures h3

We will have to go through our checklist progression

<37.Nf6+ gxf6> Not forced, but after 37...Kh8 38.Rd8 and Black is lost! <38.exf6> Attacking the rook with tempo <38...Ree8 39.f5> With the dual threat 40.fxe6 & 40.Qxh6 mating at g7

<39...Kh7> Evidently forced to protect the weak pawn at h6; 39...Qxg3 loses instantly to 40.Rg4+ while he has no time for 39...Bxf5 due to 40.Qxh6

<40.Rh4> Threatening 41.Qxh6 forcing mate


click for larger view

Black has no adequate defense: 40...h5 41.Rxh5+ Kg8 42.Qg5 mate; or 40...Rh8 41.Qxh6+ Kg8 42.Qg7 mate; or (and I only noticed this in PM: Black can delay mate by exchanging the Queen 40...Qxd1+ 41.Qxd1 Rg8 42.Qh5 Rg6 and Black is losing heavy material and the game: 43.fxg6 and White wins)

**********
PM: I was able to find the corrrect line focusing on the threatened squares around the Black King; I was certain 38...Ree8 was best and spent considerable time before rejecting 38...Rd7 (which Black played!). The more I look at it, it really doesn't matter

BTW: Yusupov is one of my favorite players and teachers

Jan-31-13  mistreaver: Thursday. White to play. Medium. 37?
Black's king is in danger, there are threats of Nf6, f5, Qxh6, and also swingin the rook on the kingside.
But what is the correct order of the moves?

37 f5 Bxf5 (forced because black can't allow f6)
38 Nf6+ and now black can decline or accept the sacrifice a)38...gxf6
39 exf6 and with
Qxf6 coming it is hard to see how black survives.
b)38...Kh8 seems much more tenacious. Now white has to dosomething else he will be in trouble. I quite like
39 Rh4, with the threat of Rxh6
39...Bh7 and now
40 Rxh6 wins i think
Time to check.
-----------
Hmmm i kinda mixed the move order, but
i don't know if it is that much of a big deal, at least i don't see a hole in my analysis, will have to lay hands on Fritz to verify and evaluate my score for today. Any opinions on immediate f5?

Jan-31-13
Premium Chessgames Member
  Penguincw: I got the knight sac and pawn advance to attack the bishop, but somehow, I missed the simple re-capture.
Jan-31-13  ler: Is this move order right? 37.R1d3.Qa2.38.Ra3.Qe2.39.Bf3.Of course is better the game move.
Jan-31-13  morfishine: <ler> Yes, 37.R1d3 Qa2 (forced) 38.Ra3 Qe2 (forced) 39.Bf3 and the Black Queen is trapped:


click for larger view

I also looked at this idea, but goofed with 39.Bf1 (and so settled on 37.Nf6+)

Nice work, excellent catch!

Jan-31-13  patzer2: Correction to my previous post regarding <36. Rf8?>. Instead of <Better are 36... Nb4 or 36...c4 =>, I meant to post better are 36...Nb4 or 36...c5 =.

Also if instead of resigning Black plays 39...Kh7,


click for larger view

White has only one clear winning continuation in 40. fxe6! .

If 40. Rxd7? Bxd7 41. Rxd7 (not 41. Rd4?? Bxf5 42. Rh4 Qb1! ) 41...Qxg3 =, White's attack fizzles.

Jan-31-13
Premium Chessgames Member
  kevin86: A little deep for me. I do realize that the last move opens a road for the rook...to mate with the queen.
Jan-31-13
Premium Chessgames Member
  Jimfromprovidence: Take a look at the position at resignation, after 39 f5.


click for larger view

Black resigns because he wants to play 39... Kh7, to protect against Qxh6, but he can not handle the threat after 39...Kh7 40 fxe6 Rxd4 41 Rxd4, below. The threat is 42 Be4+.


click for larger view

Now here's the initial position but with the f rook on e8.


click for larger view

Now, with the same continuation 39...Kh7 40 fxe6 Rxd4 41 Rxd4,...


click for larger view

...black can simply play 41...Rxe6, preventing 42 Be4+.

Jan-31-13  DLev: On the attempt to trap the queen with 37. R(1)d3 can't black simply retreat 37 ... Qb6 and protect the d8 square preparing to answer 38. Nf6+ with Kh8.?
Jan-31-13  howlwolf: I don't see what happens after 39 f5 Bf5;40 Qh6 is answered by Qg3 where if white continues 41 Rd7 Bd7 43 Rd7 it looks like black has a perpetual after 43... Qe1+ 44Kh2 Qe5+. If white plays 40 Rd7 Bd7 41 Rd7 Qg3 in response to 39.. Bf5 he still can't play 42 Qh6 because of the perpetual. His best seems to me to be 42 Rb7 where he is better, quite likely winning but black still has some chances. My solution of the puzzle began with Rd1-d3, chasing the queen to b6 or a2 where it cannot help stop the assault on the black king and then continuing as in the game.
Jan-31-13
Premium Chessgames Member
  agb2002: White is a pawn down.

The black queen looks exposed but trying to trap her with 37.R1d3 doesn't work due to 37... Qb6 (37... Qa2 38.Ra3 Qe2 39.Bf3).

Another option is 37.f5, opening lines against the black king. However, it seems to fail after 37... Bxf5 38.Nf6+ gxf6 39.exf6 Re3 40.R4d3 Rxd3 41.Rxd3 Qxd3 42.Qxh6 Qxg3.

This line suggests a change in the move order, that is, 37.Nf6+:

A) 37... gxf6 38.exf6

A.1) 38... Rc7 39.f5

A.1.a) 39... Bxf5 40.Qxh6 Qxg3 41.Qxf8+ Kh7 (41... Kxf8 42.Rd8#) 42.Rh4+ and mate soon.

A.1.b) 39... Kh7 40.Rh4 and mate soon.

A.2) 38... Ree8 39.f5 looks similar to A.1.

A.3) 38... Rd7 39.f5

A.3.a) 39... Rxd4 40.Rxd4 Qxg3 (40... Kh7 41.Rh4) 41.Qxh6 with the many threats (Rg4+, Rh4, fxe6, etc.).

A.3.b) 39... Qxd1+ 40.Qxd1 Rxd4 41.Qxd4 Bxf5 42.Qf5 with the double threat Qxf5 and Qxh6.

B) 37... Kh8 38.Rd8 wins decisive material.

Jan-31-13  morfishine: <DLev> Yes, bad day for me...of course, 37.R1d3 <37...Qb6>

Is it too late to delete? :)

Jan-31-13  Patriot: Black is up a pawn. Black's pieces are awkwardly placed and the only threat I see is 37...c5. The black queen almost looks trappable but I see no way of doing this. A move I like is 37.Nf7+:

37...gxf6 38.exf6 Re8 39.f5 Bxf5 40.Qxh6 and mate next.

37...gxf6 38.exf6 Re8 39.f5 Kh7 40.Rh4 Qxg3 41.Qxh6+ Kg8 42.Rg3+

37...Kh8 38.f5 Bxf5 39.Rh4 looks really strong, threatening 40.Rxh6+

That's about all I see for now--enough time spent on this.

Jan-31-13  Patriot: Sorry...I meant 37.Nf6+.
Jan-31-13
Premium Chessgames Member
  Phony Benoni: <howlwolf> After <39.f5 Bf5 40.Qh6 Qg3>


click for larger view

Now after 41.Rd7 Bd7 42.Rg1! is the move. However, best is <41.Rg4+> forcing mate (as pointed out by earlier kibitzers)

Jan-31-13  DarthStapler: Got it
Feb-02-13  mistreaver: Wow, what a difference it is, 37. f5 is a big blunder because in the case of 37...Bxf5 38 Nf6+ gxf6 39 exf6 black has Re3 and white queen can't go to h6. zero for today.!
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