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Yu Yangyi vs Grigoriy Oparin
World Junior Championship (2012), Athens GRE, rd 10, Aug-11
Sicilian Defense: Najdorf Variation. English Attack (B90)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Feb-18-18  stacase: 27 Bishop takes h6 kind of obvious, the rest - not so much.
Feb-18-18  stst: Another typing exercise... not tricked this time, just give the likely probable one. Main idea is to exploit Black K's leaving that corner (f6-h8,) and later marching down the dP. Rf is most helpful, but need Rc to guard back rank. No direct +, but best place to go: g6,... 27.Qg6, the no way to guard the hP...but to guard the gP..., so Re7 (get away from possible QxR later) 28.Bxh6 Kf8
29.d6 Rd7
30.Rxf6+ Kg8
31.Re6 Bd4
32.Re8+ RxR
33.QxR+ Kh7
34.QxR KxB
35.Qh3+ Kg6
36.d7 Bxc5
37.Qd3+ Kh6
38.d8=Q and the rest is too trivial

Tough would be getting Black's toughest defense right....see

Feb-18-18  mel gibson: The text move is chosen by Stockfish 8
but gives only a small advantage:

27. Bxh6

(27. Bxh6 (♗e3xh6 ♖c8-d8 d5-d6 ♕a5-b5 ♖c1-b1 ♕b5-d7 ♕f5-g6 ♖e8-e6 ♗h6-d2 ♗e5-d4 ♖f1-e1 ♖e6xe1+ ♖b1xe1 ♗d4-e5 ♗d2-a5 ♖d8-c8 ♗a5-c7 ♖c8-f8 ♕g6-d3 ♕d7-c6 ♕d3-c4+ ♔g8-h8 ♗c7-b6 g7-g5 ♕c4-e6 ♔h8-g7 h2-h3 ♖f8-f7 ♖e1xe5 f6xe5 ♕e6xe5+ ♔g7-h7 ♗b6-d8 g5-g4 ♕e5-h5+ ♔h7-g8 ♕h5xg4+ ♖f7-g7 ♕g4-e6+ ♔g8-h7 ♕e6-f5+ ♔h7-h6 ♕f5-f2) +1.43/32 99)

score for White +1.43 depth 32

However -
when Black takes that poisoned Bishop then

27. Bxh6 gxh6

(28. d6 (d5-d6 ♔g8-h8 ♕f5-h3 ♕a5-d2 d6-d7 ♖c8-d8 d7xe8♕+ ♖d8xe8 ♖c1-b1 ♖e8-e7 ♖b1xb7 ♖e7xb7 ♕h3-c8+ ♔h8-g7 ♕c8xb7+ ♔g7-f8 c5-c6 ♕d2-c2 ♕b7-d7 ♕c2-c4 ♖f1-d1 ♕c4-f4 ♕d7-d8+ ♔f8-g7 ♖d1-d7+ ♔g7-g6 ♕d8-g8+ ♔g6-f5 g2-g4+ ♕f4xg4 ♕g8xg4+ ♔f5xg4 c6-c7 ♗e5xc7 ♖d7xc7 h6-h5 ♔h1-g2 f6-f5 ♖c7-a7 h5-h4 ♖a7xa6 h4-h3+ ♔g2-f2 ♔g4-f4 ♖a6-a4+ ♔f4-g5) +4.79/32 59)

score for White +4.79 depth 32

Feb-18-18  patzer2: Knowing it's a difficult Sunday puzzle which typically involves a promising piece sacrifice, it was easy to deduce the first move of our solution is 27. Bxh6!

After White's reply 27...gxh6, I picked 28. Qg6+ +- (+2.49 @ 33 ply, Stockfish 8) as my initial follow-up. Now 28. Qg6+ +- is not as strong as the computer first choice 28. d6! +- (+4.43 @ 33 ply, Stockfish 8), but it is stronger than the game continuation 28. Rc4 ± to +- (+1.42 @ 33 ply, Stockfish 8).

However, 27...gxh6? is far from Black's strongest reply. Putting up much more resistance is 27...Rcd8 28. d6 Qa2 ± (+1.15 @ 35 ply, Stockfish 8) or 27...Qb5 28. d6 Rcd8 ± (+1.20 @ 35 ply, Stockfish 8).

Earlier our Opening Explorer indicates Black has had better results with 10...Bg4 = (+0.11 @ 32 ply, Stockfish 8) than with the game continuation 10...Bf5 ⩲ (+0.32 @ 32 ply, Stockfish 8).

Feb-18-18
Premium Chessgames Member
  al wazir: Although the sac of a minor piece for a ♙ in the wall protecting a castled ♔ is a standard theme in CG's puzzles, I missed 27. Bxh6 because I didn't see a continuation.

But why does black tamely swap his ♕ for a ♖? That doesn't look promising. I would have played 28...Rc7 to block the file (and create a counter threat against g2). What does white do now?

Feb-18-18  yadasampati: <al wazir> After 28. ... Rc7 white might play the following: 29. Qg6+ Kf8 30. Rxf6+ Bxf6 31. Qxf6+ Rf7 32. Qh8+ Ke7 33. Re4+ Kd7 34. Qxe8+ Kc7 35. d6#
Feb-18-18  mel gibson: < I would have played 28...Rc7 to block the file (and create a counter threat against g2). What does white do now?>

And then Black loses his Rook on e8 in 3 moves:

Stockfish 8.

28. Rc4 (28. .. Rc7 29. Qg6+ (♕f5-g6+) +6.20/30 25 (29. Qg6+ (♕f5-g6+ ♖c7-g7 ♕g6xe8+ ♔g8-h7 ♕e8-e6 ♕a5-b5 d5-d6 ♕b5-d7 ♕e6-d5 a6-a5 ♕d5-d3+ ♔h7-h8 ♖c4-h4 ♖g7-h7 ♕d3-d2 a5-a4 ♕d2-a2 ♖h7-f7 ♕a2xa4 ♕d7xa4 ♖h4xa4 b7-b6 ♖f1-d1 b6xc5 ♖a4-a8+ ♔h8-g7 ♖a8-c8 ♗e5xd6 ♖d1xd6 ♖f7-a7 ♔h1-g1 ♖a7-a1+ ♔g1-f2 ♖a1-a2+ ♔f2-f3 h6-h5 ♖c8xc5 ♔g7-g6 ♔f3-g3 ♖a2-a3+ ♔g3-h4 ♖a3-a2 ♔h4-h3 ♖a2-a4) +6.41/29 6))

Feb-18-18
Premium Chessgames Member
  WorstPlayerEver: Same here 27. Bxh6 gxh6 28. Qg6+
Feb-18-18
Premium Chessgames Member
  Big Pawn: 27.Bxh6 gh
28.Rc4

Now it seems that black will be overwhelmed, but his responses do not seem forced to me, or at least I don't see it.

I tried to make 28.Qg6+ work with all kinds of different followups but they all petered out. This is what caused me to settle on 28.Rc4

Feb-18-18  diagonalley: <diagonalley>: nul points (again) :-(
Feb-18-18
Premium Chessgames Member
  Richard Taylor: I thought it was Bxh6 but Black doesn't have to retake the piece.

After 27 Bxh6 Qa4 is not really that bad for Black.

Also 27...Qb5 28. d6 Rcd8 29. Qg6 Qd7 30. Bf4 and Black could well hold.

I came up with 27. d6 knowing that Bxd6 was a line:


click for larger view

27. d6

and if Bxd6

The if 28. Bxh6 Bf8 29. Qd5+ Kh7 30. Bxg7 Bxg7 31. Rc4 Re5 32.Rh4+ Bh6 33. Qf7+

and there are other lines.

Say 31 .... Re7 32 Qf5+ wins

and 31 ... Rc7 32 Qh5+ etc

And
27. d6 Bxd6 28. Bxh6 Bf8 29. Qd5+ Kh7 30. Bxg7 Kxg7 31. Rc4 Rc7 32. Rg4+ Kh7 33. Qh5+ Bh6 34. Qg6+ Kh8 35. Qxh6+ Rh7 36. Qxf6+

Was another line.

But this is all destroyed by the computer brilliancy in this line:

After my 31 Rc4 (which is good in all other lines if not winning perhaps) then 31...Qe1!! But who would find that! Of course, someone would...


click for larger view

Here White is now lost!

However this line is probably leading to a draw with a lot of tactics! That is:

27. d6 Bxd6 28. Qd5+ Kh8 29. Bxh6 Bf8 30. Bxg7+ Bxg7 31. Qh5+ Kg8 32. Qd5+ Kf8 33. Qd6+ Re7 34. Rxf6+ unclear...it looks as though Black gets mated or it is a perpetual...

But earlier here:

27. d6 Bxd6 28. Qd5+ Kh8

29. Bd2!


click for larger view

And now it is about = after

Rxc5 30. Qxd6 Rd5 31. Bxa5 Rxd6 32.
Bb4 with a B against 3 pawns.

But one idea of 27 d6 (threatening to fork the rooks) is that if Black plays say 27 .... Rde8 28 Qg6 threatens Bxh6 and it seems impossible to defend the mate.


click for larger view

Yangyi's play was very inspired and it was an interesting example of the English Attack which I have played both sides of a lot...

Feb-18-18
Premium Chessgames Member
  Richard Taylor: Should be

But one idea of 27 d6 (threatening to fork the rooks) is that if Black plays say 27 .... Rcd8 28 Qg6 threatens Bxh6 and it seems impossible to defend the mate.

Ref8 seems as bad and the Black Q cant get to c7

Feb-18-18
Premium Chessgames Member
  Richard Taylor: <WorstPlayerEver: Same here 27. Bxh6 gxh6 28. Qg6+>

That is a good idea which I saw also at first, but it seemed to only lead to a draw so I felt that 27 d6 was the best. I saw the rook lift...but I wasn't convinced by it.

Feb-18-18
Premium Chessgames Member
  malt: Played 27.B:h6 gh6 28.Qg6+ Kf8 29.Rc4
Had wins against 29...Qd8 29...Qb5 29...Qc7
but could not find a good line against 29...Ke7

Nul points

Feb-18-18
Premium Chessgames Member
  agb2002: White is one pawn down.

The pawn on h6 invites to play 27.Bxh6:

A) 27... gxh6 28.Qg6+

A.1) 28... Kf8 29.Rxf6+

A.1.a) 29... Bxf6 30.Rf1

A.1.a.i) 30... Ke7 31.Qxf6+ Kd7 32.Qd6#.

A.1.a.ii) 30... Rc6 31.dxc6 Re6 32.Rxf6+ Rxf6 33.Qxf6+

A.1.a.ii.1) 33... Ke8 34.Qe5+ Kf7 (else 35.cxb7 wins) 35.c7, avoiding 35...Qb5, wins.

A.1.a.ii.2) 33... Kg8 34.Qg6+ wins the h-pawn with check and White will push his after adequate preparation.

A.1.a.iii) 30... Qc3 31.Rxf6+ Qxf6+ (31... Ke7 32.Qf7+ Kd8 33.Rd6#) 32.Qxf6+ Kg8 33.Qg6+ wins the h-pawn with check again.

A.1.b) 29... Ke7 30.Re6+ Kd8 (30... Kd7 31.Qf7+ and mate next) 31.Rxe8+ wins decisive material.

A.2) 28... Kh8 29.Qxh6+ Kg8 30.Qg6+ Kh8 (30... Kf8 31.Rxf6+ as above) 31.Rf5 and mate soon.

B) 27... Rxc5 28.Qd7 (28.Qg6 Re7 unclear) wins decisive material.

Feb-18-18
Premium Chessgames Member
  agb2002: I missed 30... Qxc5 in my line A.1.a and White seems to have to settle for perpetual.
Feb-18-18  stst: <..But why does black tamely swap his ♕ for a ♖? >

Remember this is only a Junior tourney, though "dubbed" as Championship. May be in time pressure, sac the Q to at least delay the loss is human knee-jerk. Overall, not too bad a game, but the way it's played out is... sorry to say... at least not brilliant.

Feb-18-18  landshark: After 27. Bxh6 I didn't like ... Rxc5; 28. Qg6, Re7 and White makes no progress. I missed 28. Qe7 winning. So no point for me today :(
Feb-18-18  newzild: <<stst> Remember this is only a Junior tourney, though "dubbed" as Championship. May be in time pressure, sac the Q to at least delay the loss is human knee-jerk. Overall, not too bad a game, but the way it's played out is... sorry to say... at least not brilliant.>

At the time of this game, White was already a strong Grandmaster and Black was an International Master, soon to become a Grandmaster.

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