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Tristan Calistri vs Grzegorz Gajewski
27th Cappelle-la-Grande (2011)  ·  Sicilian Defense: Kan. Polugaevsky Variation (B42)  ·  0-1
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Given 15 times; par: 25 [what's this?]

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Kibitzer's Corner
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May-10-11
Premium Chessgames Member
  scormus: <alexrawlings:....they're probably better qualified to decide when to throw the towel in!>

I am often puzzled at how quick players are to resign sometimes, and sometimes how slow. W is certainly losing but I suspect he didnt see that 24 Bh6 would force B to find the right line. Since CG put this up today I wonder if they just saw 0-1, W apparantly dropping a piece, and rated it "easy"

May-10-11
Premium Chessgames Member
  kevin86: Is this all there is? Black wins a piece after 22...Qxf3 23 R (orP)xf3 Bxc4 24 dxc4 Rxd2
May-10-11  CHESSTTCAMPS: In this open middlegame position, black is down a pawn, but the active bishop pair and control of the semiopen d-file provide ample compensation. The pinned d-pawn marks the white bishop as the vulnerable target. 21... Qxf3 unleases the Be6, a battery where the lesser-valued piece is behind the screen. Now white must lose material:

A) 22.Rxf3 Bxc4 23.Bh6 (23.dxc4 Rxd2 is immediately resignable) Bc5+ 24.Kh2 (Kf1 Bd5 traps the Rf3) Bd5 25.Bxf8 Kf8 26.Rf1 Bd4 27.Re1 Re8 and the e-pawn falls with a clear winning ending for black.

B) 22.gxf3 Bxc4 23.Bh6 Be6 24.Bxf8 Kxf8 25.Kh2 Nf4 also wins a pawn with two dominating bishops for a rook.

Time for review...

May-10-11  CHESSTTCAMPS: <Patriot> <You may be right that it's premature to resign but for solving a puzzle or playing this OTB I consider it "good enough".> Perhaps, but with a desperado bishop on the board at h6, (asssuming plenty of time on the clock) it is still good analysis practice to analyze until the position is more quiescent.
May-10-11
Premium Chessgames Member
  Jimfromprovidence: My opinion on the line 22...Qxf3 23 gxf3 Bxc4 24 Bh6 is for black to ignore that threat and keep up the attack.

There are plenty of ways to go here but I liked the simple 24...Bxd3, below, threatening Bc4+.


click for larger view

Now, if 25 Bxf8 Kxf8 26 Nxd3 Rxd3 follows, black is up an exchange and is likely to win one or more pawns as well because of white's inferior pawn structure.


click for larger view

May-10-11  Ghuzultyy: <Jimfromprovidence: In the line 22...Qxf3 23 gxf3 Bxc4, one has to respond to 24 Bh6 to fully solve the puzzle.>

Let's see.

Position after <24.Bh6>;


click for larger view

<24...Be6>
A simple move. 24...Bc5+ , Bb5, Bxd6 are all playable.

<25.Bxf8 Kxf8>
h3 pawn is hanging so;
<26.Kh2 Bg5>
e3 pawn is hanging so;
<27.Ra3 Bf4+>
e5 pawn is hanging and so on..

Black has great positional advantage and white can't defend much more.

May-10-11
Premium Chessgames Member
  Once: <scormus> I remember reading somewhere (sorry, can't recall the source) a suggestion about early resignations.

This strategy should be used with care, as it can backfire.

First you need to pick the right game. It needs to be a game that you don't expect to win or you don't mind losing. Maybe it's a pretty dreary position where you can see that you are just going to be ground down.

You stare long and hard at the position, chin cupped in hand, brow furrowed, pencil chewed. In fact you should think for so long that your opponent starts to get a little bit concerned that you have spotted something devastating (you haven't).

Then you cry something like: "By gad, sir, but that's utterly brilliant! I see it now. In ten moves time you are going to sacrifice your queen, perform the heimlich manouvre on the h file, then it's shades of Alexikov-Zipperdeedoodah 1961, you put me into zabaglione and wherever I move it's the classic zukertot-bogoljubov mate. An astonishing coup, sir. I congratulate you."

At this point you tip your king and accidentally knock all the other pieces over. Your opponent and the rest of the chess club are gob-smacked by the depth of your chess knowledge and calculating ability. Make a quick exit to the pub.

May not enhance your grade, but might elevate your reputation....

May-10-11  patzer2: <JimfromProvidence> After your 23. gxf3 Bxc3 24. Bh6!?, I also like 24...Bxd3 with Black getting a clear two pieces for the Rook.

However, Fritz for some reason indicates 24...Bb5 is stronger.

I would play the simple 24...Bxd3 without hesitation, but that may be because I prefer playing a simple winning line when one is available.

May-10-11  CHESSTTCAMPS: Jim, you're certainly right that black is better and probably winning from your 2nd position, but I think it makes more technical sense not to give away the bishop pair for the passive knight. The vulnerable white pawns will fall anyway and there are strong attacking chances against the white king with more pieces on the board.
May-10-11
Premium Chessgames Member
  al wazir: This is NOT "easy." The lines with 23. gxf3 24. Bxc4 Bh6 are far from trivial.

I'm not sure what message <CG> is trying to send, but it's annoying.

May-10-11  MaczynskiPratten: Knowing it's a puzzle here actually makes it more difficult. I was looking at various mating attempts for some minutes rather than the natural Qxf3 going for the prosaic win of a piece. Mundane. And it doesn't even fully work (because of Bh6).
May-10-11
Premium Chessgames Member
  scormus: <Once> Brilliant way to turns the tables, I must remember that one. It recalls that great series "Michael Green's coarse golf class."
May-10-11  dufferps: Yes - After trying a few variations, I'm convinced that no matter what white does from there black will win. But, unlike Calistri, I would not have recognized that right off.
May-10-11  ZUGZWANG67: This was so easy that I spent way too much time trying to find the unconventional.

But the only solution I found is 22...Qxf3 (clearing the road to the defender of the d2-bishop) 23.gxf3 (23.Rxf3) 23...Bxc4 24.dxc4 Rxd2, simply winning a piece.

Let's see.

-----------

Peace!

May-10-11
Premium Chessgames Member
  Patriot: <<CHESSTTCAMPS> <<Patriot> <You may be right that it's premature to resign but for solving a puzzle or playing this OTB I consider it "good enough".> Perhaps, but with a desperado bishop on the board at h6, (asssuming plenty of time on the clock) it is still good analysis practice to analyze until the position is more quiescent.>

Generally I agree, but white doesn't have a strong attack in this position. Here black can safely go into the combination without fear of getting mated or losing significant material. The a1-rook barely sees light of day...the knight on c1 is hardly poised to attack anything, and the f1-rook (or f3-rook, depending on the response) poses no danger. What's to fear? It seems the position becomes quiescent very quickly.

May-10-11
Premium Chessgames Member
  fm avari viraf: Calistri quips,"Oh my Bishop."
May-10-11  eightsquare: I saw Black's win and was thinking of a way to STOP it because i thought it was White to play ! :( AFter a long long think and after analysing moves such as Qxh5 i finally gave up and saw the solution just to see that it was Black to play!

Too bad, but a nice puzzle for Tuesday. Please read my latest comments on The World Championship Candidates Knockout page it can be really important.

May-10-11  ZUGZWANG67: <<Jimfromprovidence>: In the line 22...Qxf3 23 gxf3 Bxc4, one has to respond to 24 Bh6 to fully solve the puzzle.> Indeed, and it doesn't matter whether still win or not. The point is 24.Bh6 is the kind of in between move that can be missed OTB and when that happens, it can make someone sweat! And homestly, I missed that interesting reply. I'm still on my way analysing the consequences.

<<patzer2>: I would play the simple 24...Bxd3 without hesitation, but that may be because I prefer playing a simple winning line when one is available.>

24...Bxd3 is a more human move than 24...Bb5. While I was trying to understand why the computer would choose the latter I gave the position to Rybka. Rybka rates the position after 24...Bxd3 at -2.80, and gives -3.32 after 24...Bb5 (21 ply 30 minutes). I think it is so because it considers that B still wins an extra pawn after 24...Bb5 while keeping the bishops. And thus, it gives the following continuation: 24...Bb5 25.Bxf8 Kxf8 26.Ra2 (preventing 26...Bc5+ 27.Kh2 Bd4, when now after 26.Ra2, 28.Re1 defends) 26...Bc5+ Be3, followed by 27...Bf4+ and 28...Bxe5. Black won a center pawn AND kept the bishops. BTW Rybka gives alomost the same evaluation (3.23)after 24...Bc5+.

I'm not sure whether a human should try to see so clearly ahead in an actual game! But it is interesting how the machine can grab any tiny thing available from a position.

May-10-11
Premium Chessgames Member
  David2009: T Calistri vs G Gajewski, 2011 Black 22...?

I can't find a good move so I'll play a bad one. Not sound, but fun to play, is 22...Qxc4!? 23 dxc4 Rxd2 and if 24 Nb3 Rxb2 25 Rc1 Rd8 and White has an uncomfortable time. Time to check how the game went:
====
Missed it! 22...Qxf3! of course. Here's a link to the unsound variation: http://www.chessvideos.tv/endgame-t... Kudos to any one who can win it as White


click for larger view

especially without silicon help.

May-10-11  WhiteRook48: I went for randomly sacrificing the queen, but the correct answer was 22...Qxf3
May-10-11  cyclon: Easy? Best I could come up today is 22. -Qxf3 23.Rxf3 (gxf3 Bxh3 Black has at least a good game) -Bxc4 24.Bh6 Bc5+ 25.Kh2 (because of the Knight forks etc. the least worse square) -Bd5 26.Bxf8 Kxf8 27.Rf1 Bd4 and Black has a good game but no straight win in sight - but easy, no way man!.
May-10-11  cyclon: <Once> A nice story you wrote, I even laugh to it a bit. Even.
May-10-11  Big Black Bug: Ok, this is the line that I found for 24.Bh6

22...Qxf3 23.gxf3 Bxc4 24.Bh6 Bc5+ 25.Kh2/Kg1 (25 Kh1 26 Ng3+) Bxd3 26.Nxd3 Rxd3

Now, white keeps his material as

27.Bxf8

as it leads to

27... Rd2+ 28.Kh1 Ng3#

May-10-11  KingV93: I did get this one, probably because it's Tuesday, but the Q exchange stood out as inevitable after deciding there was no stunning sacrifice. Looking at the DSB check on c5 led me to see that Black can win Whites DSB because of the pin on d3. Satisfying to see something subtle..IMHO anyway.
May-10-11
Premium Chessgames Member
  sevenseaman: <Big Black Bug> <22...Qxf3 23.gxf3 Bxc4 24.Bh6 Bc5+ 25.Kh2/Kg1 (25 Kh1 26 Ng3+) Bxd3 26.Nxd3 Rxd3

Now, white keeps his material as

27.Bxf8

as it leads to

27... Rd2+ 28.Kh1 Ng3#>

Good. The line looks sound to me. (25. Kh2/Kg1 is a typo I believe. It should be 25. Kh2/Kg2.)

I'd think Bh6 was a losing move anyway; the White DSB has a role on the c1-h6 diagonal.

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