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Kiril Dimitrov Georgiev vs Ian Rogers
Biel Interzonal (1993), Biel SUI, rd 5, Jul-20
Benko Gambit: Accepted. Modern Variation (A57)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Given 12 times; par: 38 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Jun-26-08  piever: Well, for me it was easier than usual because black had to look for something forceful as his king is exposed to extremely annoying checks (as always, if you have such a pawn structure and don't have a bishop on the a1-h8 diagonal...). However very nice mating combination, though I'm surprised that Georgiev missed it...
Jun-26-08  desiobu: The hard part is getting the correct sequence but finding the actual moves was really straightforward.
Jun-26-08
Premium Chessgames Member
  whiteshark: I missed 27...Rxf2+ completely. Yet a cute combination, but today zero points for me. :(
Jun-26-08  zanza: Ouch! Saw Bxg2+!... But missing Rxf2+!!
Jun-26-08  ThomYorke: Easy line for strong players like me. I am used to beat low rated people(2100 or less) with this kind of combo.
Jun-26-08
Premium Chessgames Member
  playground player: It just ain't challengin' to play those poor dumb schnooks ranked at 2100...
Jun-26-08
Premium Chessgames Member
  patzer2: White's 25. Nxc5?? was the losing blunder. Instead, as <RandomVisitor> suggests, 25. g6 would have held with advantage.

Also worth considering was 25. Bc4+!?, which allows Black to equalize only if he can find some clever defensive resources, and 25. Qh6 which also holds with advantage.

Of course RV's recommended 24. Bc4+! Kh8 25. Re1 is probably White's best improvement in terms of enhancing his winning chances.

Jun-26-08  griga262: This week has been fairly easy so far. 26.Bxg2+ Kxg2 27.Rxf2+ leaves White only very limited options, none of them viable.
Jun-26-08  Kasputin: Material is about even. Black has lots of pieces trained at the white king. Conversely black's king position is exposed and white, if given the opportunity, can make some menancing looking moves like Bc4, Qxd4 etc...

So black should do something asap.

I first thought about 26 ... Qg3 thinking (mistakenly) that 27. fxg3 Rxc1 is mate. Of course it isn't mate, and after I noticed that the king can simply take the black bishop or the white bishop can take the black rook, I wondered what planet I could actually be from to even think this momentarily.

Then I started thinking about how it would be nice if the black queen/bishop battery could have the position of the pieces reversed (i.e., have the queen where the bishop is and have the bishop behind the queen). Is there a way to do this? - move the h2 bishop to create some sort of threat, then get the queen in front of the bishop, etc... It didn't take long to realize that that was impractical.

I came back to that Qg3 move - not as the first move of course, but I wondered if could somehow get the queen down there, and thinking about the location of the two bishops and the rook, I saw:

26 ... Bxg2+
27. Kxg2 [forced] Rxf2+

Now white has 4 legal moves. It is pretty easy to exclude moves like 28. Kh3 (because of the reply Qxg3#). Moving the king back to h1 leads to 28 ... Rxc1+; 29. Kg2 Qg3+; 30. Kxc1 Qg1#

Okay, so much for the unexpected moves. What about 28. Rxf2 or 28. Kxf2?

a) 28. Rxf2 Qg3+
29. Kf1 (or h1) Qg1#

b) 28. Kxf2 Qg3#

And there is nothing white can do.

Yesterday's puzzle was very nice and so is today's. Both feature a queen and bishop checking a king. And like yesterday's, the other white pieces act more as hindrance than help.

Time to check.

Jun-26-08  Kasputin: Okay I screwed up with the possible 28. Kh1 sequence - missing the fact that white can take the rook with the bishop. Hopefully I would have followed up correctly OTB, but since I didn't see all of this from the initial position, I have to say that I missed this one. Darn!
Jun-26-08  Woody Wood Pusher: I thought 28...Qg3

Seems OK still

Jun-26-08  Woody Wood Pusher: scrub that it loses. should have seen 28...Qa8+, oh well
Jun-26-08
Premium Chessgames Member
  kevin86: It took me a while to figure on the incredible 27 ...♖xf2+!!!.

Once you get over the shock of the move,the finish is easy.

Each variation has epaulette qualities-28 ♔xf2 ♕g3# or

28 ♖xf2 ♕g3+ 29 ♔f1 ♕g1# Ok,this one doesn't 29 ♔h1 ♕g1#

Jun-26-08
Premium Chessgames Member
  Aurora: 26 ... Bxg2+ was easy to spot.
Jun-26-08
Premium Chessgames Member
  Once: It's our old friend, the stalemated king. So the first thing we need to look for is a check. It turns out that 26. ... Bxg2+ is the only check in the position, so let's try that.

27. Kxg2 is forced. Now we would really love to play Qg3+, but the f pawn gets in the way. So let's try to destroy the f pawn with 27 ... Rxf2+ and the rest is a matter of calculation.

I love the way that 27. ... Rxf2+ accomplishes several things at once. It destroys the f pawn, making g3 safe for the white queen. It deflects the rook from the back rank, to give the queen the mating square g1.

And it does all this with check so that white does not have time for a counterattack.

Although I was a bit disappointed not to have a discovered attack to grab an unprotected queen ....

Jun-26-08  SpoiltVictorianChild: Bxg2+ was the first things I saw, but didn't see the Rxf2+ follow up, so it took me a while to see it as the winning line.
Jun-26-08  SuperPatzer77: <Once> <...It destroys the f pawn, making g3 safe for the white queen...> Ooops!!

<Once> - It is not the White Queen - just the Black Queen that is ready to move to g3. Not the White Queen. I know that you mean it is the Black Queen.

Don't feel bad that you eat your own word, OK? Don't worry, OK?

:-D

SuperPatzer77

Jun-26-08  234: Wednesday puzzle <38. ?> Jun-25-08 Euwe vs G A Thomas, 1946
Jun-26-08  Artar1: Nice puzzle! An all-forced, double sacrifice checkmate that's not too difficult, and is the type I dream about but never get to play!
Jun-26-08  Castleinthesky: It's decoy week. The solution is obvious and only merits one-star.
Jun-26-08
Premium Chessgames Member
  DarthStapler: Bxg2+ was the first move I looked at but I dismissed it because I didn't see any follow - up. I didn't even consider Rxf2+ until I read the kibitzing
Jun-26-08  DavidD: This is actually a very nice puzzle showing how incredibly difficult it is to sometimes see even just two moves ahead. While 26...Bxg2+ is one of the first moves to look at, the real move is 27...Rxf2+ forcing mate. There are many such unexpected resources in games. It takes experience, creativity, and a lot of persistence to find these hidden gems.
Jun-26-08  MaxxLange: I thought it was undefended Queen week
Apr-20-10  ChessYouGood: Mr Rogers! This guy can sniff a win out of nowhere! When is he going to come out of retirement? I saw him analysing live games at the Doeberl Cup in Canberra recently, thinking through crazy variations at a whim - the guy is an absolute marvel.
Jun-24-11  ColeTrane: silly knight . . .
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