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Shannon Scott Neubronner vs Wesley So
ASEAN-ch6 U12 (2005), Thailand, rd 1
Sicilian Defense: Lasker-Pelikan. Sveshnikov Variation (B33)  ·  0-1
ANALYSIS [x]

FEN COPIED

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sac: 24...Rxh2+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jun-10-15
Premium Chessgames Member
  morfishine: Black forces mate starting with: <24...Rxh2+> 25.Kxh2 Qh6+ 26.Bh5 Qxh5+ 27.Kg2 Qh3+ 28.Kf3 Bh3#

*****

Jun-10-15  kamagong24: simply amazing! did not spot that one
Jun-10-15
Premium Chessgames Member
  Tiggler: White's position was not all that bad. If it were white's move in the puzzle position he would win with 1. Qe8+ Qf8 2. Qxf8+ Kxf8 3. gxf4

That was my solution, until I noticed it was black to move, and the puzzle became much easier!

Jun-10-15  pedro99: Why the two stars?
Jun-10-15
Premium Chessgames Member
  morfishine: Sorry, meant 28... Bg4#
Jun-10-15  zb2cr: The most challenging part of this is finding a way to keep the White King from escaping after 24. ...Rxh2+; 25. Kxh2, Qh6+; 26. Bh5, Qxh5+; 27. Kg2. At first look, 27. ... Qh3+ looks like mate, but White has a flight square with 28. Kf3. Now, Black must not carelessly play 28. ... Qxg3+; with the White Bishop no longer on e2, that's available for a flight square. The right way is 28. ... Bg4# which was hard for me to see at the beginning of the combination.
Jun-10-15  Caissas Clown: The solution beginning with the sac on move 24 was easy. Had it started a move earlier,I'd probably have missed 23...f4.
Jun-10-15
Premium Chessgames Member
  whiteshark: <pedro99: Why the two stars?> I tend to believe that 1.5 stars seem to fit better
Jun-10-15  chessvcr: Isn't 23.... Q*g3 already winning?
Jun-10-15
Premium Chessgames Member
  Penguincw: Ooh, I got 23...Rxh2+ 24.Kxh2, but then proceeded with 24...hxg3+ 25.Kg2 Bh3+ 26.Kxh3 Qh6+ 27.Kxg3 Qg5+ 28.Qg4 Qe5+ 29.Kg2, and gave up there. 1/3 now, and I doubt I'm going to solve another puzzle again this week.
Jun-10-15
Premium Chessgames Member
  Longview: Difficult, to me. 33... fxg3 is a strong looking move on first look but it opens the f file and 34.Qe8+ is a forced mate 34...Qf8 35. Qxf8#

The only forcing lines I see are 33...Rxh2+ 34. Kxh2 fxg3+ 35. Kg2 followed by either Bh3+ or Bf4. and I am at the end of my vision. I do see the 34...Qh6+ is possible but I don't see the continuation. I did not see the end of this originally until after playing the game.

Oh: 33...Rxh2+ 34. Kxh2 Qh6+ 35. Kg2 Qh3+ 36. Kf3 Qxg2#

Jun-10-15
Premium Chessgames Member
  kevin86: Mate will come soon by bishop and queen!
Jun-10-15
Premium Chessgames Member
  AvidChessMan: I like the position of black’s e3 bishop and defending/defended f4 pawn, hemming in the white king. This pawn is also denies the white queen h4 – so moving it did not make sense. My eyes were then drawn to the rook and h file. A good sac and then check by the black queen does the trick.
Jun-10-15
Premium Chessgames Member
  gawain: Everything follows nicely after 24 ...Rxh2+. The White King is chased to f3 where he meets his fate, all trussed up with nowhere to go.

A pleasing finish.

Jun-10-15
Premium Chessgames Member
  chrisowen: Jam as h2 ive got able mate as four man as...

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Jun-10-15
Premium Chessgames Member
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Jun-10-15  Bubo bubo: Since White cannot block the h-file effectively and the black bishops are already aiming at the white king, the sac 24...Rxh2+ advertises itself: After 25.Kxh2 Qh6+ Black forces mate with either

A) 26.Kg2 Qh3+ 27.Kf3 Bg4#/Qxg3# or

B) 26.Bh5 Qxh5+ 27.Kg2 Bh3+ 28.Kh~ Bxf1#

Jun-10-15
Premium Chessgames Member
  playground player: <Mrs. PGP> solved this right away.
Jun-10-15
Premium Chessgames Member
  PawnSac: <davedude9: Where did White go wrong? I don't know this variation, but it seems to me that Black pretty much equalized with 11...f5 and White's game just deteriorated from there.>

..f5 is sort of a stock move in this line, but I definitely did not like Bxe5?! giving white a clear passer. Maybe just 17.Rf2 instead. But I personally prefer the 7.Bg5 line. I don't play this, I think it gives black too much.

Jun-10-15  schachfuchs: Very easy Monday puzzle, imho.

I would also like to know why Black didn't play 23....Qxg3? Was the game continuation even stronger?

Jun-10-15
Premium Chessgames Member
  thegoodanarchist: <al wazir: The ♖ sac was obvious...>

Well, it is only a Wednesday puzzle.

Jun-10-15
Premium Chessgames Member
  Cheapo by the Dozen: I got delayed thinking ... fg+ might be the correct second move, but it goes awry for multiple reasons. I eventually found the correct:

---

The base case is

24 ... Rxh2+
25 Kxh2 Qh6+
26 Kg2 Qh2+
27 Kf3 Qxg6#

25 Bh5 delays the inevitable, but Black will be up a piece and pawn with a blistering attack. Also, he'll play ... Bg4+, unblocking his back rank defender with tempo, so White won't have meaningful counterplay even if the attack doesn't lead to a quick mate.

Jun-10-15
Premium Chessgames Member
  Cheapo by the Dozen: White seemed terrified of Black's e/f-pawn front.
Jun-11-15
Premium Chessgames Member
  patzer2: <woody b: i don't think b4 was decisive. yes, it is the mistake that allows the finishing mate, but the position is already hopeless. black controls virtually all the black squares around white's king. so imho giving up the bishop pair with 17. Bxe5 was the blunder.>

I also didn't like 17. Bxe5?! and prefer 17. Bxg5 Qxg5 , which avoids surrendering the bishop pair and doesn't give black two connected center pawns. You'd think this alternative would give White just enough play to hold the draw.

However, plugging it into the computer, I was surprised to see Deep Fritz 14 evaluated 17. Bxe5 (-0.53 @ 20 depth) almost the same as 17. Bxg5 (-0.52 @ 22 depth).

Also, it's not clear White is completely busted after 22. g3 (-1.38 @ 20 depth) instead of <22. b4? Rh6 > (-5.80 @ 20 depth, Deep Fritz 14).

I'd think it's fair to say White's game started a steady slide down hill with <12. f3?!> and that he was completely busted after <22. b4? Bh6!>. As to where White reached the point of no return, I suppose 17. Bxe5?! is as good a guess as any.

Jul-01-15  Gurujuta: All the same it was an amazing battle.... So's got a few tricks up his sleeve.
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