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Jorge Alberto Rubinetti vs Santiago Imbert
Homenaje a la Bandera (2001), Rosario ARG, rd 5, Jun-17
Sicilian Defense: 2.b3 Variation (B20)  ·  1-0

ANALYSIS [x]

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Given 18 times; par: 31 [what's this?]

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Kibitzer's Corner
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Apr-27-11  scormus: Is it still only Wednesday? This time 19 exf6 and 20 fxg7 shouts to be played, but seeing that it definitely wins is another matter.

Thanks <Jim> for showing that it is, even without B's cooperation on move 20 ...

And <Rilkefan> for posting the line I might have wasted half the day looking at

Apr-27-11
Premium Chessgames Member
  takchess: 25 points toward the King and a rook to follow. Something was bound to happen in this position.
Apr-27-11  gofer: White has two mating threats; one long term and one short term. If white gives up the short term one, by sacrificing the queen then the long term one starts to become a real pain in black's neck...

<19 exf6 ...>

The threat of 20 Qh7# cannot be blocked and as white has two supporting pieces (Ng5 and Rh5) there is no way to remove the support. So the only choice is take the queen.

<19 ... Bxe4>
<20 fxg7! ...>


click for larger view

White has given up the queen for two minor pieces. But black still has two pieces "en prise" so one of them is in trouble! After that white simply doubles the rooks on the h file and black is dead dead dead.

20 ... hxg5 21 Rh8#

20 ... f6 21 Nxe6! Qd6 22 Rxh6 Kf7 (Bh7 23 Rdh1 winning or Bd5 23 Rh8+ Kf7 25 Rxf8+ Rxf8 26 gxf8=Q+ Kxe6 27 Re1+ winning) 23 gxf8=Q+ Rxf8 24 Nxf8+ Kg7 (Kxf8 25 Rh8+ Kg7 26 Rg8+ Kh6 27 Rdh1+ mating!) 25 Rdh1 winning!

20 ... f5 21 Nxe6! Qd6 22 Rxh6 Bd5 23 Nxf8! Bxc4 (Qxh6 24 Bxd5+ e6 25 Nxe6 winning easily) 24 Rh8+ Kf7 25 g8=Q+ Ke8 26 bxc4 winning

20 ... Rc8 21 Nxe4 d5 22 Bxd5 Qxd5 23 Rxd5 White is a pawn and two pieces up

20 ... Bg6? 21 Rxh6 d5 22 Rxg6! e6 23 gxf8=Q+ Kxf8 24 Rxe6! OMG this is horrid for black

20 ... Rc8 21 Nxe4 f6 22 Nxf6! exf6 23 Bxf6 Re8 24 Be5 Qc6 and I would recon black is dead dead dead...

20 ... Bd5 21 Rxh6 e5 (f6 22 gxf8=Q+ Kxf8 (Rxf8 Rg6+ Kh8 Rh1#) 23 Bxd5 fxg5 24 Bxe6 mating) 22 gxf8=Q+ Kxf8/Rxf8 23 Bxd5 winning easily

20 ... Bf5 21 Rxh6 e5 (f6 22 gxf8=Q+ Rxf8 (Kxf8 23 Bxd5 winning as fxg5 24 Rh8# and Bxe6 Nxe6+) 23 Bxe6 Kg7 24 Rdh1 winning

<20 ... d5>
<21 gxf8=Q+ Kxf8>
<22 Nxe4 f6>
<23 Rxh6 Qb7>
<24 f3 a6?>
<25 Rdh1 b6?>
<26 Rh8+ Kg7>
<27 R8h7+ Kg6/Kf8>
<28 Be6 mating>

Apr-27-11  KingV93: Spent a little more time this morning than usual, about 5 minutes, lol, and was rewarded with success! Patience paying off...

Seeing the Blacks ♘f6 is holding the defense together, Whites ♗b2 protects the advancing pawn and that the ♖d1 can go to h1 led me to the correct choice...happily.

Apr-27-11  sevenseaman: Thanks < MaxxLange and morfishine> I went to the Fischer -Rubinetti game. A thrilling experience!
Apr-27-11  patzer2: One interesting aspect of today's Wednesday puzzle solution is that the winning Queen sham sacrifice 19. exf6! was actually foreseen a move earlier with 18. Ng5!

I suspect the reason we didn't see 18. Ng5! as a puzzle was that the computers rate three winning alternatives (i.e. 18. Rxh6, 18. Qh4, 18. Qg4) as much stronger. However, for pure aesthetics and sheer amusement I like the clever 18. Ng5! .

The difficulty in today's solution is not so much in visualizing the combination, but rather in realizing that the final position after 20. fxg7 is clearly won.

One amusing possible continuation from the resigned position is 20....Rfd8 21. Rxh6 e5 (21...Rd4 22. Bxd4 ) 22. Bxf7+ Kxg7 23. Ne6+ Kxf7 (23...Kxh6 24. Rh1#) 24. Nxc7 with a Knight fork winning the Black Queen with interest.

Apr-27-11  Pensive: One of my shortcomings is often being unable to see my opponent's defensive resources. I analyzed this problem out to 21.Rxh6, with the short-sighted conclusion that White has an unstoppable mate. It turns out White is winning, luckily for me, but Black can stave off mate by 21...Rd4, or even better 21...e5, as I found out when reading the kibitzing
Apr-27-11  Patriot: 19.exf6 seems a difficult choice that I had to look over quite a few times to make sure it works.

19...Bxe4
The most critical choice to consider.

20.fxg7
This grabs another piece and leaves two of black's piece's en-prise. So far white is down a queen for two pieces with another on the way. The idea that the white knight is hanging is just an illusion at this point, since 20...hxg5 21.Rh8#. If black moves the rook, let's say 20...Re8 21.Nxe4 wins a third piece for the queen. If black saves the bishop, white can at least play 21.gxf8/Q+ and win more material. Afterwards, white can simply retreat the knight.

These may not be the best possible lines or even "computer" lines, but in my opinion is sufficient to prove 19.exf6 is winning which is my main concern.

Apr-27-11  Marmot PFL: exf6 Bxe4 fxg7 not too difficult. White gets more than enough material for the queen, besides a mating attack. If Rf8 moves Rxh6 and either e5 or f6 is answered by check with the LSB.
Apr-27-11  MiCrooks: I think a few missing the point...you don't take the R on f8 you take the pawn on h6 with your Rook. So for instance, nariga, on Bf5 Rxh6 and what now? f6 pretty much forced. NOW gxf8+ Rxf8 Nxe6 Bxe6 Bxe6+ Kg7 Rdh1 and Black is in deep trouble.
Apr-27-11
Premium Chessgames Member
  kevin86: What an impudent pawn! Marching on despite the sacrifice...
Apr-27-11  newton296: 3-3 so far this week. this is the hardest I have had to work to solve easy puzzles but I'm still perfect so far.

little worried about thursday as this one took me a good 10 minutes to make sure I had all the lines worked out.

Apr-27-11  cyclon: Maybe I'm not sure about the day, but I'd continue 19.exf6 Bxe4 (this is a forced move) 20.fxg7 and Rook lets say -Rfc8 (alternatives;-Bg6-f5/-d5 21.gxf8Q+ with 22.Rxh6 to follow -maybe even 21.Rxh6 is playable/with 20. -e5 there is a beautiful 21.Nxe4 keeping the edge/ on 20. -f6 21.gxf8Q+ Rxf8 22.Nxe6 Whites got bind and material-other Black moves seems to be no better) 21.Rxh6 f6 22.Rdh1 and this position (from the sleeve, actually - don't know does this have anything to do with the game continuation) is very interesting, because if Black here plays f.e. 22. -Bd5 (also -Bf5 and -Qd6, -Qf4? loses) then White can surprise a little more by playing 23.Rxf6 when game might continue 23. -gxf6 24.Bxf6 Qxg7 25.Bxg7 and regardless which Bishop Black takes White will have 3 pawns for the exchange and it would be almost a miracle if he loses - theoretically. Anyway, a rich puzzle-position in several possibilities - to go astray.
Apr-27-11
Premium Chessgames Member
  agb2002: From a Bishop Opening, perhaps.

The material is even.

Black threatens 19... B(N)xe4 and 19... hxg5.

Except the rook on d1 every single white piece aims at the black castle. Therefore, take advantage of such overkill with 19.exf6 Bxe4 (19... hxg5 20.Qh7#) 20.fxg7

A) 20... hxg5 21.Rh8#.

B) 20... Rfd8 21.Rxh6

B.1) 21... f6 22.Nxe6 Qd6(b8,c8) 23.Rh8+ Kf7 24.Nxd8+ Kxg7 25.Rg8+ and mate in two.

B.2) 21... Rd4 22.Bxd4 cxd4 23.Nxe4 Kxg7 24.Rdh1 + - [R+B+N vs Q].

C) 20... Rfe8 21.Rxh6

C.1) 21... f6 22.Nxe6 Qd6(b8,c8) 23.Rh8+ Kf7 24.Nf8+ Kxg7 (24... e6 25.g8=Q+ and mate soon) 25.Rg8+ and mate in two.

C.2) 21... e5 22.Bxf7+ Kxg7 23.Re6 with multiple threats (24.Bxe5+, 24.Bxe8, 24.Rxe5, etc.).

D) 20... Rfb(c)8 look similar to C.

E) 20... f6 21.gxf8=Q+ Rxf8 (22... Kxf8 23.Nxe6+ and 24.Nxc7) 22.Bxe6+ Kg7 23.Nxe4 Qc6 24.Bd5 + - [R+2B+N vs Q].

F) 20... Bg6 21.Rxh6

F.1) 21... f6 22.Rxg6 fxg5 23.gxf8=Q+ Kxf8 24.Bxe6 followed by Rg8#.

F.2) 21... e5 22.gxf8+ Kxf8 (22... Rxf8 23.Rxg6+ and mate in two) 23.Rh8+ Kg7 24.Rxa8 + - [2R+2B+N vs Q].

Apr-27-11  cyclon: <agb2002:> Your C.1-variation was fine. That is the idea that I didn't find.
Apr-27-11  ZUGZWANG67: Material is equal here but White has the more active pieces and an attack against Black's K-side.

The immediate White's threat is mate at h7 when the Nf6 is captured, which oblige Black to capture the WQ. But there's a more subtle possible pattern: an Anderssen mate (WR at h8 + a WB on the a1/h8 diagonal and / or a Wp at g7, with a Bp at f7).

So 19.exf6 Bxe4 20.fxg7 e5 (20...f6 21.Ne6) 21.Bxf7+ and:

a) 21...Rxf7 22.Ne6 with the double threat of 23.Nxc7 and 23.Rxh6

b) 21...Kxg7 22.Ne6+ Kxf7 23.Nxc7;

Both lines win material.

Let's see.

------------

I'm not sure if my analysis is accurate but at least, I found the winning idea.

Apr-27-11  SamAtoms1980: When there is a dizzying number of possibilities, as here, it's nice to pick the right one.

To win this game, White's e-pawn must morph into the Cookie Monster. 19 PxN!! OM NOM NOM NOM!

19 .... BxQ. White passed over the attack on his Queen.

20 PxB! OM NOM NOM NOM! Now Black has no way to stop 21 RxP and his King is next.

OM NOM NOM NOM!

Apr-27-11  David2009: J A Rubinetti vs S Imbert, 2001 White 19?

19 exf6 Bxe4 (the threat is Qh7# and 19...hxg5 fils to prevent it) 20 fxg7 threatens Rxh6 and Rh8# as well as gxf8+ and Nxe4. GOOT! Time to check:
====
Puzzle position:


click for larger view

Crafty End Game Trainer link:
http://www.chessvideos.tv/endgame-t...

The EGT rises to the GOOT (<Get out of that! - Once>) with 20... Rfd8 21.Rxh6 Rd4 22.Nxe4 Kxg7 23.Rdh1 Rg8 to reach


click for larger view

Would anyone care to demonstrate the White win without using silicon? (or alternatively improve on my play as White from the puzzle position.)

Apr-27-11  rilkefan: The EGT busts (I think) the line I posted above by playing Qf4 instead of Kg6.
Apr-27-11  wals: Rybka 4 x 64

Game was equal move 14.h4, .0.58.

14...Nh4, +1.02. Best, Kh8, 0.58.

16...gxh5, +4.62. Best, Qd7 or Bb7, +1.86.

17.Rxh5, +3.19. Best, Bd3, +4.62.
irrespective of this White still had enough clout to force resignation.

Apr-27-11  MountainMatt: Simply out of my league. See ya next week!
Apr-27-11  WhiteRook48: oh, that's nice. I'm 0/3 for this week
Apr-27-11  mrsaturdaypants: OK, I have fifteen minutes to solve this before Thursday's puzzle comes up.

I considered 19 Nxe6, but I think it's got to be 19 exf6. White offers up his queen, threatening mate if its not taken. So, 19...Bxd4.

Here I was drawn again to Nxe6, but I think it's a siren song still. Better is 20 fxg7. That pawn on g7 is just killer. It's protected by white's bishop, the h-file rook is poised, after taking the h6 pawn, to use it to deliver mate, and its attacking black's rook. Nasty stuff.

Here black has choices, though. Strikingly, almost none of them seem to blunt white's attack. 20...Bd5 takes white's LSB a little out of the game, but that seems like little consolation after 21 Rxh6.

The best line I can find is this:

20...Rd8 21 Rxh5 f6 22 Nxf6 (Bxf6 fizzles out, I think) Qd6 23 Rh8+ Kf7 24 Nxe8++ (so, not a good square for the rook) Kg6 (better than Kxg7, allowing white's rooks to control the g and h files in some lines).

And...I didn't get it before the end of Wednesday. Time to check.

Apr-27-11  M.Hassan: "Medium/Easy" White to play 19.?Sides are equal

Let Black takes the Queen!
19.exf6 Bxe4
20.fxg7 <if...hxg5 21.Rh8#> 20..........f6
21.Rxh6 Kxg7
22.Nxe6+ Kxh6
23.Rh1+ Kg6
24.Nxc7
And White will be ahead after exchange
Time to check
22.

Apr-28-11  estrick: <David2009>
It took me 20 - 30 tries, but I finally found a line where Black gives back the queen, and leaves White with both bishops and an extra pawn versus a rook.

19. exf6 Bxe4
20. fxg6 Rfd8
Now take the bishop on e4 immediately
21. Nxe4 f6
22. Rxh6 Kxg7
23. Rdh1 Rh8
24. Ng5 Qc6
25. Nxe6+ Qxe6
26. Bxe6 Rxh6
27. Rxh6 Kxh6

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