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Arthur Hugaert vs Bayarsaikhan Gundavaa
48th World Junior Championship (2009), Puerto Madryn ARG, rd 1, Oct-22
Sicilian Defense: Closed Variation (B23)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
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Jun-17-19  lost in space: I love Mondays!

49...Qxh2+ Rxh2 Nf2#

The royal fork mate.

Jun-17-19
Premium Chessgames Member
  agb2002: Blac can deliver mate in two: 49... Qxh2+ 50.Rxh2 Nf2#.
Jun-17-19
Premium Chessgames Member
  Penguincw: Wow, that's a nice combination. As soon as I saw the potential fork on f2, I got the puzzle.
Jun-17-19
Premium Chessgames Member
  al wazir: I stopped after finding 49...Ng3+ 50. Kg1 Nf1+ 51. Kf2 (51. Kh1 Qxh2+ 52. Rxh2 Rxh2#) Qxh2+ 52. Ke1 (52. Kxf1 Rg1#; 52. Ke3/Kf3 Rg3#) Nd2 53. Rbxd2 Rg1+ 54. Qf1 Rxf1 55. Kxf1 Qxf4+, etc. White is completely busted.

So I never saw the mate in 2.

Jun-17-19  Cheapo by the Dozen: Nice one. ... Nf2 doesn't work if it's played too early in the line, and ditto if it's played too late. But after the queen sac, the rook on the second rank is pinned, and the perfect time for ... Nf2 has arrived.
Jun-17-19  saturn2: I saw 49...Qxh2+ 50. Rxh2 Nf2# and that
50..Ng3+ also wins.
Jun-17-19  stacase: When I was a kid, I was taught that the Bishop was a little bit better than the Knight. Hmmm, can a Bishop jump out of the weeds and attack three pieces all at once? Well anyway after the Queen sacrifice, as was pointed out by others, the Rook is pinned and helpless to guard against der Springer.
Jun-17-19
Premium Chessgames Member
  fredthebear: The long-range bishop is slightly better than the knight if no pawns are in the bishop's way. The knight prefers a crowd; hence the finish of this game. The multi-directional knight might serve better in speed chess. It all depends on it's position in relation to other units.
Jun-17-19
Premium Chessgames Member
  steinitzfan: There's a nice interference theme with Ng3+ followed by Ne2++ (mate in 9 according to Stockfish). It's going to be a little murky for most humans because it's not clear how to mate or even maintain the material gains in the ensuing complications. I didn't see the game line.
Jun-17-19  malt: Spied the fork on f2,leads to
49...Q:h2+ 50.R:h2 Nf2#
Jun-17-19
Premium Chessgames Member
  Sally Simpson: ***


click for larger view

A Queen Sac capped off with a Family Fork Mate. They don't get much sweeter.

Jun-17-19  zb2cr: I backed into this one! I was thinking that after 49. ... Qxh2+; 50. Rxh2 Black could win back the Queen with 50. ... Nf2+. Then I realized the latter move was mate!
Jun-17-19  TheaN: Actually did see the game line: it's relatively easy as these knight intrusions are often amplified by pins. Here it's actually mate as well.

However Ng3+ does also win and may be a bit more interesting to calculate:

49....Ng3+?! 50.Kg1 (Qxg3 Qxg3 51.Rf1 Qd3 #4)


click for larger view

Interestingly enough, most would probably just instantly look at Ne2++ because of the double check, but here Black can revert back to the game line with 50....Ne4+! 51.Qg3 (Nxg4 Qh1#) Rxg3+ 52.Kh1 Qxh2+ 53.Rxh2 Nf2#.

However, 50....Ne2++ 51.Kf2 Qxh2+ 52.Ke1 Bxb4! 53.Rxb4 (*d2/Kf1 Rg1#) Nxc1 from here on out it's obvious Black's destroying the board, but the fastest mate arises from 54.Qf1 Qg3+ 55.Kd2 Rh2+ 56.Qe2 Qd3+ 57.Kxc1 Qxe2 58.Rd2 Qxd2+ 59.Kb1 Rg1#

Jun-17-19  TheaN: It's a bit bizarre how White ended up in this @#$%storm of an attack. One may wonder forever what made White decide to open the h-file. I guess he thought he could revert pieces to the file itself to stop Black's attack but an instant Qh7 prevents this.

For a few moves (45-46) Black <could> have played Rf2 and win on material but decided to put the White king in the corner, realizing he'd probably caved under pressure.

Jun-17-19  DrGridlock: I first saw Qxh2, Rxh2 Nf2+, but stopped working that line because of Rxf2.

So I settled on the Ng3+ line, which wins, but not as decisively.

Pinned is pinned, as they say. Should have kept looking at the Qxh2 line, but a win is a win!

Jun-17-19  mel gibson: I saw
49... Ng3+

which is mate in 6.
I didn't see the simpler mate.

Jun-17-19
Premium Chessgames Member
  thegoodanarchist: I ‘ve seen this called a family fork
Jun-17-19  schachfuchs: The uncommon point of this puzzle is that the white rook - covering f2 - is pinned by the black rook after "our" initial (monday) queen sac!
Jun-17-19
Premium Chessgames Member
  patzer2: It's Monday and time to sac the Queen for a quick mate. Rooks don't normally pin Rooks, but for today's Monday puzzle solution 49...Qxh2+ 50. Rxh2 Nf2# does the trick.

P.S.: So where can White improve?

White's game is hopelessly lost after <43. Qc2>

[Giving Black several opportunities to go wrong but still losing is 43. Bxc3 Rxc3 44. Rh2! Rxd3! (not 43...Nxc3 44. Rh2 +-) 45. Rxd3 Qg7 46. Ng4 f5! (not 46...Be8? 47. Rh3 =) 47. exf6 Nxf6! 48. gxf6 Be8 -+ (not 48...Bxe5?? 50. dxe5 +-) 50. Ra3 Qc7 -+ (-2.75 @ 31 ply, Stockfish 10)]

<43...Qh3! -+ (-4.48 @ 34 ply, Stockfish 10).>

So we need to look for earlier improvements. Here's a few:

White missed a potential win with 19. Be3! ± to +- (+1.71 @ 32 ply, Stockfish 10), exposing the weak Knight on c5 and giving White excellent winning chances.

White allowed Black to fully equalize with 20. b4? Nxd4 = (+0.00 @ 34 ply, Stockfish 10).

Instead, 20. Be3 Nxd4 21. Bxd4 ⩲ (+0.53 @ 37 ply, Stockfish 10). would have given White a slight but lasting advantage.

White's game took a turn for the worse with 25. g4?! Ra7 ⩱, over extending the pawns and weakening the King position.

Instead, 25. Rxa8 Rxa8 26. Rc1 Qa7 27. Rc2 = (0.00 @ 37 ply, Stockfish 10) would have kept it level.

Jun-17-19  landshark: I had a hard time with this one until I saw the sneaky rook hiding out on h8.
Jun-17-19  landshark: Out of curiosity I tried to find a better move for White than the immediately losing 49.Qd3 - One way to avoid the ....Ng3+ fork while defending against the # that happened in the game would have been Qc2.

49. Qc2 Ng3+ 50. Kg1 Ne2+ 51. Kf2 Rg2+ 52. Ke1 Qg3+ 53. Kd2 Nxd4#

Hmmm....

Jun-17-19
Premium Chessgames Member
  Breunor: I started with, 'Ok it's Monday, let's sack the queen.' Then I saw Nf2 right away!
Jun-17-19  vonKrolock: Mate in two, one second to solve.
Jun-17-19  Damenlaeuferbauer: After long pondering, my old Mongolian friend Bayarsaikhan finally found the mate in two moves with 49.-,Qxh2+! 50.Rxh2,Nf2#. This is an excellent and instructive model game, what happens, if white avoids the open Sicilian against a very strong opponent. He will be squeezed like a lemon. Spassky - Portisch, Mexico City 1980 and Toluca 1982, Fedorov - Kasparov and Tiviakov - Kasparov, both Wijk aan Zee 2001, and Timofeev - Kasparov, Moscow 2004 come to my mind. The super-elite GMs punish every second-rated opening system even with the black pieces without mercy, because they know exactly the refutations (plans and move orders). This is the sad truth about coffee house opening systems.
Jun-17-19  SpamIAm: <Damenlaeuferbauer>, the Grand Prix Attack (the actual name for this opening) is controversial. White won some surprisingly quick games with it in the late 1970s- early 1980s against unprepared opponents. But in this game white strangely sets everything up and then strangely switches course with 11.e5, a move which is not in the spirit of the opening, and then attempts to match black's queenside play. Usually white tries to enforce pushing through his f-pawn to f5 as well as playing an eventual Qh4, pretty much ignoring black's queenside counterattack. It is almost as if he had a sudden change of heart. As a book on unorthodox openings once noted, "If you are going to play unorthodox openings, play them well."
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