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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 2 OF 2 ·  Later Kibitzing>
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
Premium Chessgames Member
  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
Premium Chessgames Member
  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
Premium Chessgames Member
  kevin86: The clearence sac lets in the queen. The rook is a goner.
Jan-30-13
Premium Chessgames Member
  chrisowen: Engage ha ivory an ebony enter tier you ne5s up c7 o lour centre at entrance 28.ne5+ opens the door for big ko in us crew alive curios king back-fire in f7 as scripture suffix in cost find angle at inceeded 28.ne5+ queen a ke to penetrate dead c-files it is hoof in germane one dive fifths in calm fire the cannon it down in dig akin to rightful 28...d6xe5 time moves on un-abated in c2 coughings 29.Qc7+ up ar of course it is her bet in sweep along seventhed rank in safety, f5 raid prove disappointing in cloth effect bleed him in having like me hazards in he fatal together beyond reproach in a red bull e4 get what rook in damage 26.rg3+ and b4 low in coconut 27...cxb4 clinch in e5 d6 fillet he gap in wedge open colom in dizzy bed rascal line in knight sacrifice if reject coop for bowling along say e4 or d6 on ke in c7 queen vantage still comes to the wall it is double in dig h7 ate or b8 all i gator quec7 wrench in general to ope he eh I'm liking harvest in knight rotor at h7 in split rookb8 iin delving bishop changing little win crick back i net went yay hoary for knights cease spinning Jenni.
Jan-30-13  James D Flynn: 28.Ne5+ dxe5 (if Ke8 30.Qxh7 and Rg8 winning Q for R next(if Ke8 29.Qc7 Nf6(not Ra8 30.Qxh7 with the unanswerable threat of Rg8 winning Q for R , Nf6 prepares to defend the 7th tank by Bd7)30.Qxb8 Kd8 31.Rc1 Ke7 32.Rxc8 Nd7 33.Qc7 and the Black Q has no escape squares) 29.Qc7+ Kf6 30.Qxh7 Qf7 31.Qxh6+ Ke7 32.Rg7 wins Q for R.
Jan-30-13
Premium Chessgames Member
  Gilmoy: Hah -- I saw <28.Ne5+> right away (~2 seconds), and then spent 5 minutes trying to get more than the Rb8 for it. After all, it's kind of cheap to pay P+N for "only" R and strand your own Q.

Hence, White's best continuation is to just ignore the R and use the Qc7-Rg3 for the mate threats. Any recapture on e5 lets the Bd4 pin + Rf1 dogpile.

You'd really rather have the 1 tempo Black must eventually waste on Ra8, than the R itself. Funny: I think Black actually gets mated (or drops his Q to a deflection) first.

The most exalted "R sac" is <not> taking his loose R :)

Jan-30-13  DLev: I would like to thank the regular posters for providing entertainment and instruction on my lunch breaks.

How large is white's edge if black keeps the c file closed with 27 ... Nf6 for example?

Jan-30-13
Premium Chessgames Member
  patzer2: <Dlev> After 27. b4 Nf6, Black avoids the quick clearance tactical shot 28. Ne5!, but with Black's exposed King and under protected pieces his position is hopelessly lost.

Here's one possibility played out with Frtiz 12:

27. b4 Nf6 28. bxc5 dxc5 29. Ne5+ Ke8 30. Bxc5 Qh8 31. Bd6 Ra8 32. Qc7 Qh7 (diagram below)


click for larger view

33. Rg8+! Nxg8 34. Qxh7 .

Jan-30-13  chesscheater: M.Hassan
29..........Kf6
30.Qxh7 White gets his lost piece back
30..........Qf7
31.Qh8+ What about the B on c8? Or I am missing something?
Jan-30-13
Premium Chessgames Member
  offramp: All this useless prolixity.
Jan-30-13  Kikoman: <Ne5+!> that's it!
Jan-30-13
Premium Chessgames Member
  whiteshark: <Kiko> Almost exactly my words! ;D
Jan-30-13  talsqueen: got this one! yeah!
Jan-30-13  tbentley: Black is in bad shape even if white doesn't find 29. Ne5+! (Rybka's line continues 29...Rxe5 30. fxe5 Ng5 31. Qc7+ Bd7 32. Qxd7+ (more bad stuff to follow), evaluated at +9.05 at 16 ply). Interestingly, Rybka's second-best move is 29. Bd4 Rxd4 30. Ne5+ dxe5 31. Qc7+ Ke8 32. Qxh7 Rxf4 33. Rg8 Rxf1+ 34. Kxf1 Qxg8 35. Qxg8+ (+2.77) and its third-best move is 29. Ne2 (I don't understand why it's evaluated at +2.75, although white does pick up both b pawns).
Jan-30-13  Patriot: Time's up on this one. I already spent too much time so I'm going with 28.Ba7:

28...Ra8 29.Nb6 Rxa7 30.Nxc8

28...Ra8 29.Nb6 b3 30.Qb2 Rxa7 31.Nxc8 Ra8 32.Nxd6+ Qxd6 33.Qg7+ looks very good for white since 33...Qe8 34.Qxh7.

28...Ra8 29.Nb6 b3 30.Qb2 Rxa7 31.Nxc8 Qxc8 32.Qg7+ Qxh7

28...b3 29.Qb2 Ra8 30.Nb6 seems to just transpose.

I'll go with 28.Ba7.

Jan-30-13  Shams: Inverted Jenni
Jan-30-13  Abdel Irada: <ossipossi: Another Benoni gone bad. Yes <27.b4> worths <!!>, but the gift is <22...Bxc3> lifting WQRook on third rank.>

Hmm. Could this be a ... <Phony Benoni>?

Jan-31-13  rilkefan: Stockfish meets 28.Ba7 with ...Bd7, +3-4. 28...Ra8 is +6. So, ok, I didn't really waste time looking at this.

Stockfish really wants 8 or 9...h6. It's often the case in the KID that allowing the Nd2/Be3 setup is deadly - really I'd call this a Benoni though, and that vague rule of thumb may not apply at all.

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