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Thien Hai Dao vs Florian Jenni
World Junior Championship (1998), Calicut IND, rd 13, Nov-30
King's Indian Defense: Averbakh. Benoni Defense Advance Variation (E75)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 2 ·  Later Kibitzing>
Jan-30-13
Premium Chessgames Member
  OhioChessFan: White's Knight is in the way of the Queen. Find a good square for the Knight, something forcing.......
Jan-30-13  mmousez: Wow, Black position totally collapses after 28. Ne5+. Even a move like 28. ... Ke8 runs into 29. Qc7, targetting Rb8 and Nh7. If 29. ... Ra8, then 30. Qxh7 and White threatens Rg8. Don't see any defence for Black at all.
Jan-30-13  lost in space: 28. Ne5+ in combination with 29/30. Qc7 does the job
Jan-30-13  rilkefan: Wasted some time looking at Ba7/Nb6, which doesn't appear to work, at least not immediately. Then I looked at Nd2, but ...Re7. So close the line with Ne5. This appears sufficient - even surprisingly effective.
Jan-30-13  DarthStapler: Got it
Jan-30-13  Bartimaeus: A fascinating position pregnant with possibilities. Black's awkardly placed king provides many avenues for exploration. Initial thoughts tended towards trying to distract the Black Queen in order to play Nd6+ forking the King and Rook. However, that seems unachievable without losing more material in the process.

Then spotted the sweet Qc7+ which wins the black rook. Getting the knight out with a forceful move should do the job.

28. Ne5+ dxe5 29. Qc7+ Ke8 30. Qxb8

There are some interesting variations here. Instead of the above black can choose the following :

28. Ne5+ Rxe5 29. fxe5 and here black loses the exchange and also the center wedge becomes too strong

28. Ne5+ Ke8 29. Qa4+ Ke7 30. Ng6+ and this shows that trying to avoid the loss of exchange results in worse

28. Ne5+ dxe5 29. Qc7+ Qe7 30. Rg7+ and resulting in loss of Queen.

Overall, a really rich position to play over.

Jan-30-13  M.Hassan: "Medium/Easy"
White to play 28.?
White is a pawn down.

28.Ne5+ dxe5
29.Qc7+
<if...Qe7 30.Rg7+ Kxg7 31.Qxe7 and Black Queen falls>

29..........Kf6
30.Qxh7 White gets his lost piece back
30..........Qf7
31.Qh8+ Ke7
32.Bc5+ Kd7
33.Rg7
Again Black Queen falls
Let's check

Jan-30-13  Abdel Irada: <<•>A knight from the blue<•>>

It's not hard to infer what Black expects in this position: He's obviously recently taken White's pawn on b4, and anticipates White attacking and then regaining that pawn, in the spirit of a relatively placid positional struggle. What I suspect he didn't anticipate was

<<•> 28. Ne5†! ...>

This gift horse must be accepted. Let's examine what happens if Black prefers to look it in the mouth.

(a) 28. ...Ke7? 29. Ng6† . The queen is lost.

(b) 28. ...Kf6 29. Rg6†, Ke7 30. Qc7†, Ke8 31. Qxh7 . The threat of 32. Rg8 means Black has no time to take on e5, and looks impossible to meet.

(c) 28. ...Ke8 29. Qa4† . Black has the distasteful choice of (a.1) 29. ...Ke7, losing the queen; (a.2) 29. ...b5 30. axb6†, renewing the threat; (a.3) 29. ...Kd8 30. Bb6†, Ke7, losing the queen as above, and (a.4) 29. ...Bd7?? 30. Qxd7#.

<<•> 28. ...dxe5

29. Qc7† ...>

Black has three options (noting that 29. ...Bd7 30. Qxd7† offers no help):

<(1) 29. ...Qe7?
30. Rg7†, Kxg7
31. Qxe7† >

There are some positions in which the defender can return material and survive. This isn't one of them.

<(2) 29. ...Ke8
30. Bc5!, Qf7>

(a) 30. ...Rc4? 31. Qxe5†

(b) 30. ...Qf6? 31. Rg8† .

<31. Rg8†! >

After the forced 31. ...Nf8 32. Rxf8†, White wins the queen and the attack goes on. (Of course Black can't accept the rook sac with 31. ...Qxg8?? 32. Qe7#.)

<(3) 29. ...Kf6
30. fxe5†, Rxe5
31. Bd4 >

White wins quickly after either (a) 31. ...Qe7 32. Bxe5†, Qxe5 (32. ...Kf7 33. Rg7†) 33. Rg6† or (b) 31. ...Qe8?? 32. Qg7#.

My father is fond of an old chestnut in which the punchline is "In my country, "Hi!" is a cry of pain." And after 28. Ne5†, perhaps Florian Jenni will agree, albeit with a slightly different spelling of the cry in question.

Jan-30-13  Dr. J: Here's a second solution: 28 Ba7 Ra8 29 Nb6 Rxa7 30 Nxc8 Ra8 31 Qc7+ and Black's position collapses, as White must win at least Rook.

So is this as good as, or better than the game continuation? Hard to say, because of possible bail-out variations. In my line Black would have done better to play 28...Ba7 limiting his immediate loss to the exchange. In the game variation, Black could likewise have extended his resistance with 28...Rxe5.

Can someone with an engine sort this out?

Jan-30-13  agb2002: White is a pawn down.

The black pieces on b8 and h7 are defenseless. This suggests 28.Ne5+, letting the white queen reach c7 with tempo and blocking the rook on e4:

A) 28... dxe5 29.Qc7+

A.1) 29... Ke8 30.Qxh7 and the threat 31.Rg8 wins (30... Qe7 31.Rg8+ Kd7 32.Rg7, etc.).

A.2) 29... Qe7 30.Rg7+ Kxg7 31.Qxe7+ followed by 32.fxe5 looks disasterous for Black.

A.3) 29... Kf6 30.fxe5+ Rxe5 31.Bd4 Qe7 32.Bxe5+ (or 32.Qxe7+ Kxe7 33.Bxe5 Ra8 34.Rg7+ and 35.Rxh7 + -) 32... Qxe5 33.Rg6+, etc.

A.4) 29... Bd7 30.Qxd7+ Kf6 31.fxe5+ and 32.Qxh7 wins a piece at least.

B) 28... Ke8 29.Qc7 with the double threat 30.Qxb8 and 30.Qxh7 looks winning.

C) 28... Ke7 28.Ng6+, etc.

D) 28... Kf6+ 29.Rg6+ Ke7 30.Qc7+ Ke8 31.Qxh7 wins.

Jan-30-13  mosh: Ba7 works! (1)Ba7 Ra8 (2)Nb6 Rxa7 (3)Nxc8 Ra8 (4)Qc7+ is decisive
Jan-30-13  TangoJoseph: Ne5 is Atomic Bomb, it allows the Queen to enter in to c7 and wipe Black off the board
Jan-30-13  Abdel Irada: Agreed: 28. Ba7 does also work, although it is less efficient and convincing.

Whether it constitutes a second solution depends, I suppose, on how one defines a "solution." :-)

Jan-30-13  morfishine: At first glance, Black has adequately defended his position; but there's a big hole at c7 for the White Queen to invade thru; 28.Ne5+ opens up the route for the White Queen

(1) <28.Ne5+> Clearance theme with check; Black has 3 responses, all failing:

(1a) <28...dxe5 30.Qc7+>


click for larger view

And Black's position falls apart: 30...Bd7 31.Qxd7+ Qe7 32.Rg7+ Kxg7 33.Qxe7+

(1b) <28...Rxe5> 28...Ke7 loses to 29.Ng6+ forking the Queen; <29.dxe5> Cleaner than 29.Qc7+ Re7 30.Qxb8 <29...Qe7> This sad move is the only way to keep the White Queen out of c7; <30.e6+ Ke8 31.Qxf5>


click for larger view

I don't see a reasonable defense for Black; 32.Rg8+ is threatened; if 31...Nf6, then Rg6

(1c) <28...Ke8> All moves lose for Black, but this was the weakest <29.Qc7> Decisive infilatration:


click for larger view

Threatens the rook on b8 & Qxh7 followed by Rg8 pinning the Black Queen; 29...Ra8 is met with either 30.Qxh7 or 30.Ng6 Qf7 31.Qxd6 Nf6 32.Bb6 and White wins;

**********
PM: I don't think there is much room for this being a spoiler, so most of the fun will come with trying to find earlier improvements for Black

Jan-30-13  newzild: Apart from 28. Ne5+ and 28. Ba7, White also has 28. Bb6, intending 29. Bc7 with decisive threats.
Jan-30-13  stacase: Where would White like his Queen to be and how to make that happen? Oh! Get the Knight out of the way somehow and if you say check in the process ... How cool is that?

For me this was easier than yesterday.

Jan-30-13  maxfrank: I preferred the game continuation, but this is also amusing : 28Ne5 dxe5 29fxe5 rxe5 30Qc7+ Re7 31Qxb8 with continuing threats such as Bc5
Jan-30-13  patzer2: For today's Wednesday solution, 28. Ne5+! clears the c-file for a winning double attack after 28. Ne5+! dxe5 29. Qc7+ .

If Black attempts to avoid the double attack, the deflection theme come into play.

For example if Black tries to avoid the double attack with 28...Kf6 (diagram below),


click for larger view

the deflection 29. Re6+ yields the double attack (Queen fork) after 29. Re6+ Ke7 30. Qc7+ .

P.S.: For those wishing to dig deeper, this clearance/double attack combination actually begins a move earlier with 27. b4!! (a strong winning move worth exploring).

Jan-30-13
Premium Chessgames Member
  paulalbert: I also went with the more complicated Ba7.
Jan-30-13  mistreaver: Wednsday. White to play. Medium/easy. 28.?
At first i wanted to play
28 Ne5+ dxe5
29 Qc7+
and now:
a) 29... Kd8
30 Qxb8 and white has won exchange and should win.
say 30... Ke7
31 Rc1
b)29...Kf6
30 dxe5+ Rxe5
31 Bd4 is deadly
c) 29... Bd7
30 Qxd7+ Qe7
31 Qxf5+ and Qxe4
Time to check
-------------
Okay i can claim it. 3/3 this week.
Jan-30-13  ossipossi: Another Benoni gone bad. Yes <27.b4> worths <!!>, but the gift is <22...Bxc3> lifting WQRook on third rank.
Jan-30-13  bank2010: Ne5 and Qc7 follows
Jan-30-13  snakebyt: On first look. I can't take my eyes off Nxd6+ fork followed by my Bishop and Rook pinning King where he sits. Have to sac the Night and get blk Queen to bite to do that. Not the best option when alternately Queen can finish him off after Ne5+ - but it works. I knew it was a rook sac. Black has such an overwhelming advantage.
Jan-30-13  patzer2: If 28...Ke7, the Knight Fork 30. Ng6+ wins the Queen.


click for larger view

If 28...Ke8,


click for larger view

White has the pleasant choice between 29. Qc7 (Queen fork double attack on unprotected Rook and Knight) or 29. Qa4+! b5 (29... Kd8 30. Bb6+ Ke7 31. Ng6+) 30. axb6+ Kd8 (30... Ke7 31. Ng6+) 31. Nc6+ (Knight Fork).

Jan-30-13  kevin86: The clearence sac lets in the queen. The rook is a goner.
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