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Yifan Hou vs Fabiano Caruana
GRENKE Chess Classic (2017), Karlsruhe GER, rd 1, Apr-15
Spanish Game: Berlin Defense. Rio Gambit Accepted (C67)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Apr-19-17  MichaelAndrewLo: Game Analysis:

https://www.youtube.com/watch?v=UwZ...

Aug-21-17  Yeary: For those who wanna know how Yifan would take the rook and eventually mate:

40. ... Kg5 41. Qxg3+ Kh5 42. Rg8 Rg7 43. Rxg7 Rxg7 44. Qxg7 f545. Re3 Qg6 46. Rh3+ Kg4 47. Qe5 Kg5 48. f4+ Kg449. Qe2+ Kxf4 50. Qe3+ Kg4 51. Qg3#

Dec-01-17  joddle: I think Caruana tried way too hard to win here.
Jan-25-19
Premium Chessgames Member
  al wazir: 32. b4 ?? You can't be serious.

Boy, did I miss this one. I was sure that the first two moves were 32. Bxf6 and 33. Bxh7+.

Jan-25-19  lost in space: Not even close
Jan-25-19  scholes: B4 is not a puzzle move. It's just a waiting move
Jan-25-19  drollere: <It's just a waiting move>

32. Bb4 prevents Bc5 winning the exchange and guards the Qp.

Jan-25-19
Premium Chessgames Member
  Count Wedgemore: <drollere> ...Bc5 wouldn't have necessarily won the exchange. White could safely get her queen and rook out of the pin by playing Rg3+, followed by moving away her queen.
Jan-25-19  et1: May be Chess Games should contact some of the seasoned solvers like al wazir or lost in space for help. These puzzles are getting very weird,
Jan-25-19  dTal: Omigosh. This is not a puzzle in any way that I understand the meaning. Weird game as well, Caruana seems to play himself into a horrible position thanks to some strange provocative moves. Black's moves look like one of my blitz games late at night when I want to win at all costs and get comfortably beaten as a consequence.
Jan-25-19
Premium Chessgames Member
  Count Wedgemore: I agree with those who criticize this puzzle. b4 is a good move, but not a move that fits the "puzzle move" concept.
Jan-25-19  catlover: I totally whiffed this puzzle. Didn't even get the first move. Must be Friday.

Nicely played by Hou.

I wish she played baseball. Then we could say, "Hou's on first".

Jan-25-19  Walter Glattke: Would win with 40.-Kg5 41.Rg8+ Rg7 42.Qxg3+ Kh6 43.Qh3+ Kg6 44.Re3 Rxg8 45.Qxd7 f5 46.Rg3+
Jan-25-19  The Kings Domain: The puzzle is a big "Huh?". Worst puzzle I've seen in the site. Fine win by the Chinese master.
Jan-25-19
Premium Chessgames Member
  ChessHigherCat: There's obviously no one left who has the time/experience to pick the puzzles properly. I have no right to be generous with other people's resources, but I suggest giving one or two masters a multiyear CG membership in exchange for picking appropriate puzzles. What's a couple hundred bucks compared to resolving a major problem? Giving away memberships wouldn't even be money spent, just foregone income.
Jan-25-19
Premium Chessgames Member
  ChessHigherCat: Whoops, my post got "Chris-Owened"
Jan-25-19
Premium Chessgames Member
  agb2002: The d-pawn is tabu due to Bh2+ but White can increase the pressure with 32.Bb5, threatening Re8:

A) 32... Bd7 33.Qxd5 wins a pawn.

B) 32... Be7 33.Rxe7 Rxe7 34.Rxe7 Qxe7 35.Bxf6

B.1) 35... Qe1+ 36.Kh2

B.1.a) 36... Rd6 37.Qf4 (37.Qc5 Qe6)

B.1.a.i) 37... Rxf6 38.Qxf6 wins a pawn.

B.1.a.ii) 37... Rb6 38.Qg5+ Kf7 (38... Kf8 39.Qg7#) 39.Qg7+ Ke6 40.Qe7+ Kf5 41.Qxe1 wins decisive material.

B.1.a.iii) 37... Qe6 38.Qg7+ Kf7(8) 39.Qg7#.

B.1.a.iv) 37... Rd7 38.Bxd7 Bxd7 39.Qg5+ Kf7 (39... Kf8 40.Qg7+ Ke8 41.Qg8#) 40.Qg7+ Ke6 41.Qe7+ as above.

B.1.b) 36... Rf8 37.Qxd5+

B.1.b.i) 37... Be6 38.Qg5+ Kf7 39.Qg7+ Ke8 40.Qe7#.

B.1.b.ii) 37... Qe6 38.Qg5+ Kf7 39.Qg7#.

B.1.b.iii) 37... Rf7 38.Bc4 Qe8 39.Qg5+ Kf8 40.Qg7#.

B.2) 35... Qc7(f8) 36.Bxd8 Qxd8 37.c4 Be6 38.cxd5 Qxd5 (38... Bxd5 39.Bc4 wins the bishop) 39.Qxd5 Bxd5 40.Bc4 Bxc4 41.bxc4 with a won pawn ending.

C) 32... Be5 33.Rxe5 fxe5 34.Rxe5 seems to win material. For example, 34... Bd7 35.Rg5+ Rg7 36.Rxg7+ Qxg7 37.Qxd5+ Qf7 (else 38.Bxd8 wins a bishop) 38.Qg5+ followed by 39.Qxd8+ wins.

Jan-25-19
Premium Chessgames Member
  agb2002: I missed 32... Bc5, forcing White to release pressure along the e-file with 33.Rg3+.

With this detail in mind, 32.b4 becomes much clearer since Black seems to run out decent chances.

Jan-25-19  saturn2: Like yesterday it is a training in abstaining from sacrificing pieces like 32 Bxh7 or 32 Bxf6

I saw the threat Bc5 and I also saw white cannot play 32 Qxd5;) But that is all.

Jan-25-19  moncul36: @yeary wouldnít 42. Re1-e5 be simpler? If the pawn takes the rook itís mate in two. If the king moves itís mate in three with white moves: qh4+,qg4+,rh5#.

And if instead 41. .... kh4, it allows the queen to eventually check on g4, and the rook lift re1-re3 ends it.

Jan-25-19  mel gibson: I didn't know what to do.
Stockfish 10 agrees with only the first move:

32. b4

(32.
b4 (b3-b4 ♗d6-e5 ♖e3xe5 f6xe5 ♖e1xe5 ♖d8-e8 ♖e5-g5+ ♖f7-g7 ♕d4xd5+ ♕f8-f7 ♖g5xg7+ ♔g8xg7 ♕d5-g5+ ♔g7-f8 f2-f4 ♗c8-e6 ♗h4-f2 ♕f7-g7 ♗f2-c5+ ♔f8-g8 ♗d3xh7+ ♔g8xh7 ♕g5-h5+ ♕g7-h6 ♕h5xe8 ♕h6-g6 ♕e8-e7+ ♔h7-h6 ♕e7-f8+ ♔h6-h7 ♗c5-d4 ♕g6-g4 ♕f8-h8+ ♔h7-g6 ♕h8-f6+ ♔g6-h5 ♗d4-e3 ♕g4-f5 ♕f6-g7 ♗e6-b3 b4-b5 b7-b6 ♔g1-h2 ♗b3-c2 c3-c4 ♕f5-g4 ♕g7-h8+ ♔h5-g6 ♕h8-g8+ ♔g6-h5 ♕g8-e8+ ♕g4-g6 ♕e8-h8+ ♕g6-h6 ♕h8-c8 ♔h5-g6+ ♔h2-g1 ♔g6-h7 c4-c5 b6xc5 ♕c8xc5 ♕h6-g6 ♔g1-f2 ♗c2-e4 g2-g4 ♕g6-f6 ♔f2-g3 ♕f6-f7 ♕c5-g5) +4.43/38 )

score for White +4.43 depth 38

Jan-25-19
Premium Chessgames Member
  Jimfromprovidence: Here is a study/like position from a match that occurred just 3 days ago. It's move 84, black to play (obviously) and win.


click for larger view

Below is the game link.
Radjabov vs V Fedoseev, 2019

Jan-25-19  alshatranji: I know the guidelines somewhere say you should choose the best move no matter what. But this is too much. Actually, this is one of the few cases where finding the move OTB would be easier than in the puzzle.
Jan-29-19
Premium Chessgames Member
  chessgames.com: <ChessHigherCat: There's obviously no one left who has the time/experience to pick the puzzles properly. I have no right to be generous with other people's resources, but I suggest giving one or two masters a multiyear CG membership in exchange for picking appropriate puzzles. What's a couple hundred bucks compared to resolving a major problem? Giving away memberships wouldn't even be money spent, just foregone income.>

The same person is providing the daily puzzles that was responsible for them during the last several years of Dan's tenure—and we've already informed him of the apparent need to reinstitute the "quality control" role that Dan had previously assumed.

Similar to our Editors, and inasmuch as Daniel himself wasn't a "master"—but was able to adequately perform the task—we could possibly delegate QC duties to a suitable number of qualified volunteers who would be interested in helping out.

Having said that, your suggestion is also perfectly reasonable, and we'll seriously consider it.

Feb-01-19  cormier:


click for larger view

Analysis by Houdini 4 <d 22 dpa done

1. + / = (0.33): 17...b6> 18.Rae1 c5 19.Qd1 c4 20.Bc2 Qc7 21.N3h2 Rb8 22.Ng4 Kh8 23.b4 cxb3 24.axb3 b5 25.Nge3 b4 26.Bxf5 Bxf5 27.c4 dxc4 28.Nxc4 Nd5 29.Nxd6 Qxd6 30.Ng3 Nc3 31.Re8+ Rxe8 32.Rxe8+ Kg7 33.Nxf5+

2. + / = (0.60): 17...Qc7 18.Rae1 Rc8 19.a4 c5 20.dxc5 Bxc5 21.a5 Bd6 22.g4 Ng7 23.b4 b6 24.axb6 axb6 25.Qb3 h5 26.Ne3 Qb7 27.c4 hxg4 28.hxg4 d4 29.Nxd4 Be5 30.Bc3 Ne6 31.Nxe6 Bxe6 32.Bxe5 fxe5

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