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Dmitry Stets vs Mikhailo Oleksienko
80th Viktor Kart Jubilee (2009), Lviv UKR, rd 4, Apr-14
Sicilian Defense: Scheveningen Variation. English Attack (B80)  ·  1-0



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Kibitzer's Corner
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May-19-09  Patriot: <MiCrooks> I completely agree with you. At least give white the chance to not make the best move. If he does, then resign.
Premium Chessgames Member
  kevin86: White wins with 31 ♖g1 as either capture would result in immediate mate:

31...♕xg1 32 ♘h6# or 31...♗xg1 32 ♘e7#.

White would have queen and two pieces against a pair of rooks and one piece.

May-19-09  Samagonka: This one is so straightforward that I found the solution just gazing at the pieces before I even started thinking.
May-19-09  YouRang: I struggled a little bit with this one. First I noticed Rg1 threatening a pin & win of black's queen. Then I noticed Ne7+ threatening a fork of black's K+Q. Both threats were stopped by black's bishop, so I thought it was your basic overworked piece.

But starting with 31.Ne7+ Bxe7 didn't work out so well. Sure 32.Rg1 wins the queen, but at the expense of a rook and two pieces!

Then I thought of playing 31.Rg1 first. That looks better, since it carries the sneaky threat of 32.Nh6#. But then I considered the counter-attack/clearance move 31...Rfe8, attacking my queen and vacating f8 for my king to escape Nh6.

I can take the queen: 32.Rxg6 fxg6 leaving my knight and queen both under attack.

Conveniently, my knight can escape attack with check via 33.Nh6+! -- and how lovely that the bishop prevents the king from attacking my knight, and my knight prevents the king from attacking my bishop!

The black king is forced to move harmlessly to f8, giving me time to put my queen somewhere out of take, and it looks like a white win ahead.

May-19-09  e fred: To johnlspouge:
Don't worry ! I solved it wrongly first. I refused Rg1 because of Bxg1. Then it took me a very long time to see the answer was so "simple".
May-19-09  kyuubi: The only thing I immediately saw was 31 Bd4.

Feels more natural than anything else really, but might be @#$%, because I haven't analysed yet.

Could someone give me some input on that move? Thanks

May-19-09  mworld: otb i would have messed up today. Rg1 was obvious, but then i noticed Bxg1 ...which led my eye to my knight and noticing the fork threat and diverting the bishop - at which point I made the mistake of saying good enough ne7+. should have taken my time.
May-19-09  Patriot: <YouRang> Nice analysis. 31...Rfe8 is a good line to consider since it leaves both the knight and queen under attack. The follow-up 32.Rxg6+ fxg6 (32...hxg6? 33.Qh4! is a killer) 33.Nh6+ is a clean way to proceed.
May-19-09  Patriot: <kyuubi> Interesting idea, but is less forcing. This carries several threats: Bxc5 (followed by Ne7+); Rg1.

First I thought about 31...Bxd4 32.Ne7+ which wins the queen for two pieces. Or 31...Qxf5 32.Rxf5 Bxd4. I didn't like either of those and decided on 31...Rfe8. 32.Qd2 Bxd4 33.Qxd4 Re4 34.Qxd5. This doesn't seem all that clear-cut.

May-19-09  GreenFacedPatzer: Bah!
Missed it! I first considered 27 Rg1, thinking ... Bxg1 30 Ne7+ forks the king and queen, but I completely failed to notice that it was checkmate! I convinced myself that 27 Rg1 actually didn't work, because ... Qxg1 broke the K-Q fork, and left black up after all the exchanging was done.

I opted for 27 Ne7+, figuring

27 Ne7+ Bxe7
28 Bxe7 Kh8
29 Bf6+ Kg8
30 Rg1 ...

Pinning and winning the black queen, and leaving white with a won Q+B vs two rooks endgame. It's only _slightly_ worse than finding the forced mate. :S

I award myself 20% credit, if only because I was looking at the right moves (but in the wrong order,and not understanding what they mean).

May-19-09  notyetagm: 31 ?

click for larger view

31 ♖f1-g1!

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A beautiful example of exploting <OVERLOADED> pieces.

31 ... ♗c5x♖g1 <deflection: e7> 32 ♘f5-e7#

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31 ... ♕g6x♖g1 <deflection: h6> 32 ♘f5-h6#

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The themes <OVERLOADED>, <PINS>, and <BLACKBURNE'S OTHER MATE> all combine to make 31 ♖f1-g1! possible.

May-19-09  Kasputin: Nice

Initially, I thought that white pins the black queen to the king with:

31. Qg3 (thinking that moving Rg1 wasn't the correct piece to move). The idea is that the black queen cannot capture the bishop or knight and if the black queen captures the white queen, then 32. Nh6#

But the problem is that black can move the f8 rook. So going back:

31. Rg1

If 31 ...Bxg1 then 32. Ne6+ wins a lot of material.

And if 31. ...Qxg1 then 32. Nh6#

If however the f8 rook moves (e.g., 31 ...Re8), then white plays 32. Rxg6+

White was down the exchange, but this would give white a material advantage. More importantly, with a knight, bishop and queen buzzing around the black king, it is hard to imagine that black could hang on much longer after that.

May-19-09  akapovsky: <Kasputin> Bxg1 then Ne7# it's mate
May-19-09  Kasputin: <akapovsky: <Kasputin> Bxg1 then Ne7# it's mate>

True - I just thought of the fork but I am sure in a real game one of us would have figured out it was mate


May-19-09  Kasputin: <Patriot: <MiCrooks> I completely agree with you. At least give white the chance to not make the best move. If he does, then resign.>

I also agree - I initially jumped at the thought of moving the queen to g3. Of course, it didn't take long to see that this was not the correct route, but the fact that this close to a winning move (but in fact a blunder) means that there is a slim chance that it might actually get played (or another incorrect move might get played).

May-19-09  WhiteRook48: I went crazy, thinking 31. Nh6+?? Qxh6 32 Rg1?? Qg6?? 33 Qg3??
May-19-09  crafty: 31. ♖g1 ♖fe8 32. ♖xg6+ fxg6 33. ♘h6+ ♔f8 34. ♕f1   (eval 6.88; depth 16 ply; 1000M nodes)
May-19-09  Tambo: Having just stumbled across this site, I had a look at the puzzle and having read all the possible solutions that were posted, I decided to join the site and post another possible solution.

The one thing that struck me is that nobody has suggested Qe3. Although Rg1 does win the black Queen, is it the "best" move. There are still some moves left for black. These give black oppertunities to defend, with Rfe8 also threatening white's Queen as well as covering the check on the e7 square, backed up by the Bishop. After studying blacks position, I'd personally go with Rfe8, as this still gives some attacking chances.

What I'm suggesting is 31. Qe3
if ...31.Bxe3
32. Ne7++

if ...31.Rce8 or Rfe8 then Nh6+ wins black Queen followed by mate.

I don't have a board here atm, and I'm not very good at working it all out in my head, but am I missing something ?

May-19-09  Funicular: Tambo: I don´t have a board here atm, and I'm not very good at working it all out in my head, but am I missing something?

1) No board? Use the viewer as a board !!!
2) Yup, you´re missing black´s reply Qxf5!

May-19-09  Funicular: (though black would be in dire straits after 32 Rg1+ Qg6 33 Rxg6 fxg6 (if hxg6 then Qh6 and then checkmate) 34 Qe6+ Rf7 35 Qxc8 Rf8 36 Qxc5 Rxf6 37 Qxd5+ etc)
May-19-09  CHESSTTCAMPS: <Tambo: > wrote <What I'm suggesting is 31. Qe3 ... but am I missing something ?>

The flaw is 31...Qxf6 (not Qxf5 32.Rg1+) allowing the black king a safe haven on h8. After 31.Qe3 Qxf6 32.Nh6+ Kh8 33.Rxf6 Bxe3 white can resign.

May-20-09  Tambo: OOps, overlooked black Queen taking Bishop. Oh well, it was 2am here and I was a bit tired....honest.
May-29-09  LIFE Master AJ: 2ndNature:
Ne7+ does NOT win, I ran it by Fritz ... I will leave it to someone else to post a detailed analysis.
Premium Chessgames Member
  patzer2: White's deflection 31. Rg8! removes the guard, leads to a quick mate and solves the Tuesday, May 19, 2009 puzzle. See <Kevin86>'s post above for more detail.
Jul-31-13  notyetagm: D Stets vs M Oleksienko, 2009

31 ?

click for larger view

31 ♖f1-g1! 1-0 <overloaded: e7 & g1, h6 & g1>

click for larger view

A beautifully example of exploiting not one but *two* <OVERLOADED> defenders to put a piece on a square which appears to be *doubly* protected (<DUBIOUS DOUBLE PROTECTION>).

Black's tactical problem is the <BLACKBURNE'S OTHER MATE> mating pattern. The Black c5-bishop must <PROTECT> the e7-mating square ( 31 ... ♗c5x♖g1?? 32 ♘f5-e7#) while the Black g6-queen must <PROTECT> the h6-mating square (31 ... ♕g6x♖g1? 32 ♘f5-h6#).

31 ... ♗c5x♖g1?? 32 ♘f5-e7#

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31 ... ♕g6x♖g1? 32 ♘f5-h6#

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Hence Black must lose ♕ for ♖ due to the <PIN AGAINST THE KING>

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