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Ashot Anastasian vs Felix Izeta Txabarri
Ubeda Open Tt (1996), Ubeda ESP
Bogo-Indian Defense: Grünfeld Variation (E11)  ·  1-0



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sac: 21.Bh6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Dec-22-16  Afroim: I seem 21.R:g7 is also winning.
Dec-22-16  jokerman: I was tempted by Rxg7+ which seems to win as well. Here is a fun line I saw:

21. Rxg7+ Kxg7 22. Rd7+ Kh8 23. Nf7+ Kg8 24. Nh6+ Kf8 25. Bd6+ Ke8 26. Re7+ Kd8 27. Nf7#

Dec-22-16  diagonalley: wow!... cool finish... beyond moi :-(
Dec-22-16  Mendrys: I too went with Rxg7+. It does win rather convincingly though it is objectively not as strong as 21. Bh6. I saw 21. Rxg7+ Kxg7 22. Rd7+ Qxd7 23. Nxd7

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with the dual threat of Qxf6+ and Qxa5 and an overwhelming position.

Dec-22-16  YouRang: Thursday 21.?

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Black's forces are all on the queenside, while white has a bunch of force aimed at the black's kingside. A sure sign that we can launch an attack with a sacrifice.

To my eye, <21.Rxg7+> looked pretty good since <21...Kxg7> can be met by <22.Rd7+>

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Unless black wants to give up his queen for a rook, the black king must retreat to the 8th rank (white's N and DSB have sealed off the 6th rank).

Since white wants to get the queen into the attack, black should move the king out of the range of the knight -- namely <22...Kg8>

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This is where I thought my plan had dissolved. White can't give check, which means that black will have time to defend, e.g. ...Qb3 or ...Rf8.

However, persistence paid off: <23.Ng4!>

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White now threatens mate even without the queen's help:

- 23...Qb3? 24.Nxf6+! Kf8 25.Bh6# (or 24...Kh8 25.Rxh7#)

- 23...Rf8? 24.Qxf6+! Rxf6 25.Nxf6+ and mate as above.


I see that there is more than one way to skin this cat. 21.Rxg7+ is one way to win and 21...Bh6 is another. No great difference IMO.

Premium Chessgames Member
  agb2002: The material is identical.

Black threatens fxe5.

White can attack the weak black castle with all five pieces, starting with 21.Rxg7+:

A) 21... Kxg7 22.Rd7+

A.1) 22... Kf8 23.Ng6+

A.1.a) 23... hxg6 24.Qxf6+ and mate next.

A.1.b) 23... Ke8 24.Qxf6 Kxd7 (24... Qxd7 25.Qf8#; 24... hxg6 25.Qe(f)7#) 25.Qd6+ (or 25.Qe7+ Kc6 26.Qd6#) 25... Ke8 26.Qe7#.

A.1.c) 23... Kg8 24.Qxf6 Qxd7 25.Ne7+ Qxe7 26.Qxe7 Rc6 (due to 27.Be5(h6), or 26... Rf8) 27.Qg5+ and 28.Qxa5 + - [Q+2P vs 2R].

A.2) 22... Kg8 23.Ng4

A.2.a) 23... Qxd7 24.Nxf6+ and 25.Nxd7 + - [Q+2P vs 2R] and attack.

A.2.b) 23... Qb3 24.Nh6+ Kf8 (24... Kh8 25.Qxf6#) 25.Qxf6+ Ke6 26.Qe(f)8#.

A.2.c) 23... Qc6 24.Nxf6+ Qxf6 (24... Kf8 25.Bh6#; 24... Kh8 25.Rxh7#) 25.Qxf6 and 26.Qg7#.

A.3) 22... Kh8 23.Ng6+ Kg8 (23... hxg6 24.Qxf6+ Kg8 25.Qg7#) 24.Qxf6 transposes to A.1.c.

A.4) 22... Qxd7 23.Nxd7 and the double threat 24.Qxf6+ and 24.Qxa5 wins decisive material.

B) 21... Kf8 22.Nd7+ Kxg7 (22... Ke8 23.Qxf6 wins) 23.Qxf6+ Kg8 24.Be5 wins.

C) 21... Kh8 22.Rdd7 wins. For example, 22... Qxd7 23.Nxd7 Kxg7 24.Qxf6+ Kg8 25.Bh6 and mate next.

Premium Chessgames Member
  Dionysius1: How do you mean "the weak black castle"?
Dec-22-16  stingray0104: Black over-committed to the queen side and white was able to drive a wedge between black's king and his pieces. With VIP access to black's king, white has several winning ideas, including cracking open black's kingside pawns, doubling rooks on the seventh rank, etc.
Dec-22-16  AlicesKnight: I saw it! Either capture bring down the house. But is there anything wrong with the analysis of <agb2002> (there isn't usually) as well?
Premium Chessgames Member
  whiteshark: Slit the board in 2 part and look where the pieces are...
Dec-22-16  morfishine: <21.Rxg7+>
Dec-22-16  mel gibson: <Dec-22-16 jokerman: I was tempted by Rxg7+ which seems to win as well.>

Yes - that's the one I saw too.
It does work - I checked it on the computer
but the text move is much faster & better.

Dec-22-16  Carlos0012358: Material is even. Black threatens fxe5.

Black's pieces are unbalanced toward Q side leaving the black K relatively uncovered, while white's pieces are all pointing toward the black K. Therefore, white has the opportunity to mount an attack on the black K.

There are three possible points of attack:
1) 21.Rxg7+
2) 21.Nf7, clearing the Q diagonal path and threatening the 22.Nd6 fork 3) 21.Bh6, and after 21....gxh6, followed by a powerful 22.Ng4 or 22.Nf7

Without taking then time to develop each of the three approaches, since none lead to an immediate mate, I would say that the first md third approach are the most promising. I would probably go with number 3.

Dec-22-16  cormier: found it ...
Dec-22-16  hashtag: gid=1547066&m=21
Dec-22-16 Great combination! It's amazing how fast Black's position collapses.

The defense 21...fxe5 fails to 22.Rxg7+ Kh8 (22...Kf8 23.Rxb7+) followed by 23.Rdd7, 24.Rxh7+, 25.Rdg7+, and 26.Rh8#. Black needs to yield his Q for a R to stop this.

Premium Chessgames Member
  Jimfromprovidence: FWIW, I tried 21 a4!? and so far I can't find a good response for black.

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Dec-22-16  swclark25: <> can you expound more upon the failings of 21)...fxe5 and following moves? I followed you thru 22)Rxg7+ Kh8, but then I got lost on 23.
Dec-22-16  RandomVisitor: Black was ok up to 15.Qc2

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<0.00/36 15...Rfe8> 16.e3 h6 17.h4 Rad8 18.Nd2 Nxd2 19.Rxd2 d4 20.Rad1 Ba6 21.Be4 Bb7 22.Bg2

Dec-22-16  YouRang: <Jimfromprovidence: FWIW, I tried 21 a4!? and so far I can't find a good response for black.>

There really isn't one, although after 21...Qxa4

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it pretty much boils down to the original problem, where white should find 22.Bh6 or 22.Rxg7+ or 22.Ng4 as the best shots.

Dec-22-16  YouRang: <swclark25: <> can you expound more upon the failings of 21)...fxe5 and following moves? I followed you thru 22)Rxg7+ Kh8, but then I got lost on 23.>

Not to answer for <>, but I think 23.Rdd7 would point you in the right direction.

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Dec-22-16  YouRang: For the sake of completeness:

In the <21.Rxg7> line (which seems to be the line that most of us found), black's best defense, after <21...Kxg7 22.Rd7+> is to sac the queen to stave off mate: <22...Qxd7 23.Nxd7>

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This leaves black facing both Qxa5 and Qxf6+, and the latter is worse (leads to quick mate).

Black's choice is probably to sac the rook to slow down the attack <23...Rf8 24.Nxf8 Rxf8 25.Qxa5>

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The immediate mate threats are gone, but we've simplified down to an endgame where white has a Q+P for a R, and black's pawns are scattered for easy picking.

A trivial win, which is why I felt there was no great difference between 21.Rxg7+ and 21.Bh6. That latter may be a bit faster, but why the rush when the journey is so pleasant?

Dec-22-16  swclark25: Thanks for the reply <YouRang>. I'll study more closely. I was just looking for a way for Black to survive by taking the Knight rather than the Bishop on h6.
Premium Chessgames Member
  patzer2: For today's Friday puzzle solution, 21. Bh6! exposes the weakly protected Black Kingside to a surprise mating attack. Here's some analysis with Deep Fritz 15:

<21. Bh6! gxh6>

21... fxe5 22. Rxg7+ Kh8 (22... Kf8 23. Rxb7+ Kg8 24. Rxb5 forces mate-in-seven) 23. Rdd7 forces mate-in-seven.

<22. Ng4> Black resigns in lieu of 22...Qg5 23. Nxf6+ Kf8 24. Nxh7+ Ke8 25. Qh8+ Qg8 26. Qxg8#.

For a Black improvement, I'd start with the opening.

Instead of the weak and rarely played 7...c5?!, allowing 8. dxc5 , the computers prefer the popular move 7...0-0 = as in R Henley vs Larsen, 1981.

May-09-22  Saniyat24: Pay your Tax, or you will be shot...!
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