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Denis Rombaldoni vs Eduardo Iturrizaga Bonelli
World Junior Championship (2008), Gaziantep TUR, rd 4, Aug-05
Indian Game: Yusupov-Rubinstein System (A46)  ·  1-0



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sac: 17.Nxd6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Sep-23-08  TheaN: <Kasputin> I like <26.Qxd5 Qe2 27.Qf3 Qxf3 28.Rfxf3>:

28....Kh7?? 29.Rxh6† Kxh6 30.Rh3‡

28....Rad8? 29.Bxd8

28....h5 29.g4 : White both guards the potential back rank mate and demolishes Black's kingside. I believe this is one of the most solid and crushing continuations are 26....Qe2.

Premium Chessgames Member
  Kasputin: <TheaN> More than one way to skin a cat. My method is to put out some yummy kitty food (containing tranquilizer), wait for puss to gobble that up (maybe have a smoke or a beer in the meantime) and generally take my time. Your method is to put on some oven mitts (i.e., trade queens), then go for kitty with the big steak knife. Very nice. I think I prefer your method actually.
Sep-23-08  TheaN: I'd like to repost this: <Join the Chess Puzzle League!> Everybody, please look at my profile if you like another challenge of chesspuzzles, weekly!

Might be an ad but I'd like to get some people to join in ^^.

Sep-23-08  TheaN: <Kasputin> o.O... I think that I'm not gonna let my cat near you: but you made your point.
Premium Chessgames Member
  chrisowen: thanks <patzer2> it seems you are right on track. I have to note that 25..h5 26 f5! Nd5 27. Rh4 Qxg2 is not any good either leaving white virtually a piece ahead. In your line 32.Rg5 duffs up the black king by signalling mate.
Sep-23-08  stacase: Regarding the "I got this because it's a puzzle" and would "Miss it over the board" idea:

I think a decent player would see the move the Rook would like to make and start looking for ways to get rid of the pesky Knight.

The "What happens if I blow away the Knight with the Queen?" move would be a consideration. "Hmmmm let's check that one out" would be my response.

Then like I said before, "BANG!"

Sep-23-08  VooDooMoves: <JG27Pyth> <I think this line 25...h5 26. Qg4!? Qc4 27. Rg1 Nd5 28. Rxh5 Nxf6 29. exf6 Qe2 holds for black> Agreed, my 26. Qg4 didn't work initially but how about this line:

1) 25...h5 26. Qg4!? <my idea so I have to fight for her ;)> 26...Qc4 27. Rg1 Nd5 28. Qg5! and now

a)28...Qxf4 29. Rxh5! Qxg5 Rh8#

b)28...Qxf4 29. Rxh5 Nxf6 30. Qxf4 Nxh5

c)28... Nxf6 29. exf6 Qe6 (whites threat is now queen to h6 and g7# and 29...Kh7? 30. Rxh7+ Kg8 31. Qh6 allows white to continue with said plans) 30. Rxh5 Qf5 31. Rh8+! (now this works) Kxh8 (forced) 32. Qh6+ Kg8 33. Qg7 # :D

Sep-23-08  Formula7: At first I thought the solution might be 26.Qh5??, but then I saw gxh5 27.Rg3+ Qg6! and black wins.

A few seconds later I noticed 26.Qxd5! and if 26..Qxd5?? then Rxh6 and the only way for black to prevent mate is Qxg2+ and after 28.Kxg2 then mate is unstoppable.

Sep-23-08  Soinne: <VooDooMoves> Indeed, after 26. Qg4! the end is near for black. Clever...
Sep-23-08  VooDooMoves: <Soinne> <Clever...> Thanks :)
Sep-23-08  JG27Pyth: Voodoo:< c)28... Nxf6 29. exf6 Qe6 (whites threat is now queen to h6 and g7# and 29...Kh7? 30. Rxh7+ Kg8 31. Qh6 allows white to continue with said plans) 30. Rxh5 Qf5 31. Rh8+! (now this works) Kxh8 (forced) 32. Qh6+ Kg8 33. Qg7 # :D>

Very impressive... Black's takes line b and plays on to try to swindle a draw IMO.

But back up, I think we missed something interesting:

...h5 26.Qg4 Qc4 27.Rg1 Nd3! (threatening Nf2#... and it's not an empty threat. I'm probably missing something basic in one of the lines below, but it looks to me like the N causes some problems for white... it prevents Qg5 for the moment, too.)

A few variations after ...Nd3

28.Rxd3 hxg4
28.g3?? Nf2+ Kg2 Nxg3
28.Rg1 Nf2+ Rxf2?? Qc1+
28.Rg1 Nf2+ 30.Kg1 Nxh3+ 31.gxh3 Re6... to sac back the exchange on f6 with drawing chances. 28.Qg3 Nxf4 29.Qg5 Nxh3 (threatening Nf2# again) 30.gxh3 Qe4+ 1/2-1/2

Sep-23-08  VooDooMoves: <JG27Pyth> 27...Nd3! is a great move! <Active defense>. I was only looking for ways black could stop mate threats but never imagined black could produce his own. Think I found an improvement to 1 of your lines though:

25...h5 26. Qg4 (I'm determined to make this work, LOL) Qc4 27. Rg1 Nd3! 28. Qg3 Nxf4 29. Rh4< pinning> Ne2 30. Qg5! and it seems here there is no stopping white.

a)30...Kh7 31. Rxh5+ gxh5 ( 31...Kg8 32. Rh8#) 32. Qg7#

b)30...Qxh4 31. Qxh4. At first I thought I could play (31. Qh6 and after 31...Qxf6 32. gxf6 mate cannot be stopped on g7 but black has 31...Ng3 Mate!

c)30...Nxg1 31. Qh6 is hopeless.

Sep-23-08  I Offer You A Resign: Today was relatively easy.

First, you had to notice:
1.) If you can clear out the h file for your rook, ♖h8 is mate. but...
2.) If you are hasty with ♖xh6, you don't get much after ♘xf6.

So, the answer is...

Black can only respond by either...

♕xd5, but that instantly loses because of ♖xh6, forcing ♖h8#.

♕e2, threatening mate by ♕xf1, but after ♖g1, Black is down a piece.

Sep-23-08  sataranj: 26.Qxd5! and black at least loses the queen. phew
Sep-23-08  JG27Pyth: Voodoo: I could just feel that there was a refutation there I was overlooking, and Rh4 appears to be it. Well done. You have defended your lady's honor -- Qg4! is indeed a brilliancy.

Which bring us back to your line b) which leaves white up -- Q vs R and N...

Great analysis -- it's amazing what you can find in some positions when you dig.

Now I've got to plug this position into the silcon and see how we compare.

Sep-23-08  VooDooMoves: <JG27Pyth> It is amazing what you can find when you dig. The position seemed so simple but it was anything but. Thanks for the back-and-forth analysis, it was testing and that's what I find fascinating about chess: the complexity.
Oct-16-21  mel gibson: I missed this one -
I should have looked a bit longer than 15 seconds.

Stockfish 14 says:

17. Nxd6

(17. Nxd6 (♘c4xd6 ♕d7xd6 e4-e5 ♕d6-d7
♗d3xa6 ♘c7xa6 e5xf6 ♗g7-h8 f4-f5 g6-g5 ♕d1-h5 ♗h8xf6 ♕h5xh6 ♕d7-e7 ♗h4-g3 ♗f6-d4+ ♔g1-h1 f7-f6 ♖a1-e1 ♕e7-h7 ♕h6xh7+ ♔g8xh7 d5-d6 ♖a8-d8 ♖e1-e6 ♖e8-f8 ♖e6-e7+ ♔h7-g8 ♖e7xa7 ♘a6-b4 ♖f1-d1 ♘b4-c6 ♖a7-c7 ♘c6-e5 ♗g3xe5 f6xe5 g2-g4 ♖d8xd6 ♔h1-g2 ♖d6-h6 h2-h3 ♖f8-f7 ♖c7xf7 ♔g8xf7 ♘c3-e4 ♗d4xb2 ♖d1-d7+ ♔f7-e8 ♖d7-b7 ♗b2-d4 f5-f6 c5-c4) +4.53/36 158)

score for White +4.53 depth 36.

Premium Chessgames Member
  raymondhow: I got the first two moves, then wanted to play 19.d6. The engine says best line from there is a +2.82, better than the game line so I call it a score on a Saturday :)
Oct-16-21  Brenin: 17 Nxd6 Qxd6 18 e5 is easy to see, but wouldn't 18 ... Qd7, avoiding the pin on the N on f6, have been better a defence for Black, e.g. 19 Bxa6 Nxa6 20 exf6 Bh8 ? Enduring a P on f6 is uncomfortable for Black, but having a B there, as in the game, proved to be much worse.
Oct-16-21  Cheapo by the Dozen: Bad starting point, because as <Brenin> observes, the first two moves are obvious.
Oct-16-21  Honey Blend: The defense 25. ... h5 looks tough to crack, and 26. f5! wins, and it took me some time to understand how it wins. This lies in the reasoning of why 26. ♖xh5 gxh5 27. ♕xh5 threatening Qh8# does not work.

click for larger view

Black can simply play 27. ... ♕h7, parrying all mating threats but 26. f5 blocks the ♕ out of the defense along that diagonal, and 26. ... ♘d5 trying to get rid of ♗f6 is the only reasonable plan. Now 27. ♖h4 seals the deal. If the queen moves away ♘d5 is lost. He can settle for either of the two:

I. 27. ... ♘xf6 28. ♖xe4 ♘xe4 29. ♕d5
II. 27. ... ♘e3 28. ♖xe4 ♘xd1 29. ♖xd1

Both end up with at least a piece down.

Premium Chessgames Member
  chrisowen: Little block u vamoose Nxd6 gift vet ace it is me arrive as it little val block u vamoose pack pangs it snag visage offy quad demarcate church charm v it we just juvenile z its blacks lune it tow v plushy gas it scared its commander dried its bread visage v flush defines drift flighted it ok diffuse ear vamooses accommodate jack go flush acorn frivolous aorta it jab in jest lad ha it v dj ie it the good mild an no v cop q lederhosen fridge deer guv it zag hood it is pitbull afford fx it goated it que again i quandary dins off ram need it bit i good a zelda it is grafter again it visage cow charged it in dog tan exit strategy Nxd6 doh;
Premium Chessgames Member
  agb2002: Black threatens Bxc4 and Nxe4.

The e-pawn is ready for a fork on e5. This suggests 17.Nxd6:

A) 17... Qxd6 18.e5

A.1) 18... Qd8 19.Bxa6 Nxa6 20.Ne4 looks good for White. For example, 20... g5 (20... Qxd5 21.Nxf6+ wins) 21.Nxf6+ Bxf6 22.exf6 gxh4? 23.Qg4+ and 24.Qg7#.

A.2) 18... Qd7 19.exf6 Bf8 20.Bxa6 Nxa6 21.f5 g5 22.Qg4, with the threat 23.Bxg5 hxg5 24.Qxg5+ and 25.Rf3, looks very good for White.

B) 17... Bxd3 18.Nxe8 Bxf1 (18... Rxe8 19.Qxd3 wins an exchange and a pawn) 19.Nxg7 (surely better than 19.Nxf6+ because now White eliminates both bishops) 19... Kxg7 (19... Ba6 20.Bxf6) 20.Qxf1 and White has won a pawn and weakened seriously the black castle.

Premium Chessgames Member
  chrisowen: Double v it aorta d6 no?
Coddle hopper lab more i o denced v it indeed candy no?
Premium Chessgames Member
  Breunor: Hey Chrisowen, I liked your post form 2008 better!
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