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Rui Gao vs Victor C Shen
Reykjavik Open (2015), Reykjavik ISL, rd 3, Mar-11
Spanish Game: Morphy Defense. Chigorin Defense Panov System (C99)  ·  1-0

8
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1
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f
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h
White to move.
ANALYSIS [x]
1-0

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 2 ·  Later Kibitzing>
Mar-14-15  ninja warrior: Wow strong play...
Mar-14-15  leow: 64 Qh6 Nice for a Monday or Tuesday puzzle
Mar-14-15  asianwarrior: Wow! How I wish I have this kind of mate.
Mar-14-15  Gilmoy: Wince if you've lost like this as Black many times before :) :( Where did it go wrong?

<14..a5 15..a4> is seductive, and lets Black feel he's disrupting White's plan ... but ultimately there's no vigor in the follow-through. White is very patient, and just keeps probing on both wings. The inevitable <21..g6> denies the Nf5 outpost. White is very patient, and parks in the h6-hole. Adorable: <41..Nh5 42.g3> denies the Nf4 outpost :)

<22..Nc6 23.d5 Na7> feels meek. Black loses initiative on the Q-side, and must react and defend. I guess that's the difference between a GM and a hopeful aspirant.

<37..f5> impatient, and too shallow: material isn't the key, and half-open f has insufficient support. White happily vacates e4, because <39.Ne4> is such a sweet outpost that <59.Ne4> he plays for it <twice>. In fact, at <52..h5> White must have gone into a shallow think: <what tour do I want this N to do>, and he'd rather invest four(!!) tempi on Ne4 than one tempo on 53.Ne3.

Mar-15-15  sofouuk: <Gilmoy: Wince if you've lost like this as Black many times before :) :( Where did it go wrong?>we can probably abbreviate the answer a bit: 52...Qb7 with no more than a slight positional edge for white, 52...h5? and black is objectively lost. 57.Qa7! would have got the job done more quickly, as well
Apr-28-15  diagonalley: nice example of double-check
Apr-28-15
Premium Chessgames Member
  Phony Benoni: Move 64!?

Reminded me of the finish in the famous game, F Parr vs G Wheatcroft, 1938.

Apr-28-15  dfcx: 64.Qh6+ forces black to open up the rank and at the same time block the escape route.

A. 64.Qh6+ Bxh6 65.Ng5++ Kh8 66.Rh7#
B. 64.Qh6+ Kg8 65.Qh8+ Bxh8 66.Nh6#

double check in both cases.

Apr-28-15  greenfield67: Hmm. Now I'm disappointed. I had B. 64.Qh6+ Kg8 65.Ng5+ Rf7 66.Rd8+ and mate, but <dfcx> has it a move quicker, and prettier too...
Apr-28-15  M.Hassan: "Easy"
White to play 64.?
White is a pawn up and has a Knight for a Bishop

64.Qh6+ Bxh6
65.Ng5+disc. Kh8(forced)
66.Rh7#
Black can stay slightly longer if White Queen is declined:

64.Qh6+ Kg8
65.Nh8+!disc. Rf7(forced)
66.Bxf7+ Kf8
67.Nxg6#

Apr-28-15  lost in space: I have nothing to add to what <M.Hassan> posted.
Apr-28-15  agb2002: White has a bishop, a knight and a pawn for the bishop pair.

White can deliver mate by exploiting a double check and the control of g8 with 64.Qh6+:

A) 64... Bxh6 65.Ng5+ Kh8 66.Rh7#.

B) 64... Kg8 65.Qh8+ (or 65.Ng5+ Rf7 66.Rd8+ Bf8 67.Q(R)xf8#) 65... Bxh8 66.Nh6#.

Apr-28-15  stst: Q-sac:
64.Qh6+

IF (A):
64...Bxh6
65.Ng5 dbl + Kh8
66.Rh7#

IF (B):
64...Kg8
65.Qh8+ Bxh8
66.Nh6 dbl # (only N could do it already, as R guards rank 7, Black K blocked by its own R & B, no where to go.)

Apr-28-15  stst: <Black can stay slightly longer if White Queen is declined:

64.Qh6+ Kg8
65.Nh8+!disc. Rf7(forced)
66.Bxf7+ Kf8
67.Nxg6# >

ADD to the fun would be, at move 66 of this sequence: 66.Rd8+ (instead of Bxf7+) Bf8
67.Rxf8#

Apr-28-15  patzer2: The long, tought struggle in this Ruy Lopez game is as interesting to me as the neat mating attack with <64. Qh6+!> which solves today's Tuesday puzzle.

Black endures the Spanish torture of the Ruy Lopez for over 50 moves, before succumbing with the decisive error <52...h5?>, which allows the winning, repositioning Knight retreat <53. Nh2!> (+3.30 @ 24 depth, Deep Fritz 14).

Instead of <52...h5?>, Black could have held on with 52...Qb6! when play might continue 53. Ne3 Bh6 54. h4 Qd4 55. Qxd4 exd4 56. Nc4 d3 57. Rb8 d2 58. Nb2 g5 59. hxg5 Bg6 60. Rxb4 Bxg5 61. Rd4 Rb8 62. Nc4 Rxb3 63. Nxd2 Rb2 64. Nc4 Rb4 65. Rg4 Be7 66. Ne3 Rxg4 67. Bxg4 Kg7 68. Bf5 Be8 (+0.55 @ 29 depth, Deep Fritz 14).

Earlier, instead of <49...Qd4>,Black could have more than equalized with 49... Bb5! when play might continue 50. h4 (50. f4 e4 51. Ne3 Qa7 52. Nc4 Bc3 53. Rxc3 bxc3 54. Qxc3+ Qg7 55. Qxg7+ Kxg7 ) 50... Qd4 51. Qxd4 exd4 (-0.70 @ 23 depth, Deep Fritz 14).

Apr-28-15  stacase: Took me a while to see that it worked.
Apr-28-15  morfishine: I think this game was played recently:

<64.Qh6+> Bxh6 (or 64...Kg8 65.Ng5+ Rf7 66.Bxf7+ Kf8 67.Ne6#)

65.Ng5+ Kh8 66.Rh7#

*****

Apr-28-15  mistreaver: Tuesday. White to play. Easy. 64?
64 Qh6 + Bxh6
65 Ng5+ Kh8
66 Rh7 ++
Apr-28-15  Once: If a picture paints a thousand words
Then why can't I paint you?
The words will never show
The you I've come to know

This puzzle needs a picture, or two, or three. White has many different mating possibilities here...

64. Qh6+ and now...

64... Bxh6 65. Ng5+ Kh8 66. Rh7#


click for larger view

Or:

64.... Kg8 65. Qh8+ Bxh8 66. Nh6#


click for larger view

or

65. Nxe5+ Rf7 66. Bxf7+ Kf8 67. Nxg6#


click for larger view

or

65. Nd6+ Rf7 66. Rd8+ Bf8 67. Bxf7#


click for larger view

or

65. Ng5+ Rf7 66. Bxf7+ Kf8 67. Ne6#


click for larger view

Or 65. Nh8+ or 65. Nd8+

White can mate quickly with any one of his attacking pieces apart from the queen. Her job is to lie on the barbed wire for the benefit of the bishop, knight and rook.

Fun puzzle.

Apr-28-15  Nick46: I have nothing to add to what <M.Hassan, lost in space & stst> posted, except: "I have nothing to add to what <M.Hassan, lost in space & stst> posted.", etc
Apr-28-15  TheaN: 28 April 2015 <64.?>

The power of the doublecheck is properly shown by white in two distinctive ways. White mates quikest with <64.Qh6+!> and now:

A) <64....Bxh6 65.Ng5++ Kh8 66.Rh7# 1-0> the doublecheck forces the black king in the corner.

B) <64....Kg8 65.Qh8+!> we continue queen saccing <65....Bxh8 66.Nxh6# 1-0> and the doublecheck is the actual mate.

Interesting concept.

Apr-28-15  CHESSTTCAMPS: White has a small material advantage of pawn+knight for a bishop, but a huge positional advantage with all pieces actively deployed and attacking the black king. Black's queen and Ba6 do not defend the king, so it is not surprising that white can force mate with

64.Qa6+! and now

A.64... Bxa6 65.Ng5+ Kh8 66.Rh7#

B.64...Kg8 65.Qh8+! (Ng5+ Rf7 66.Qh7+ etc also forces mate, but is slower) Bxh8 66.Nh6#

Apr-28-15
Premium Chessgames Member
  Bubo bubo: White mates in three with 64.Qh6+ Bxh6 65.Ng5++ Kh8 66.Rh7# A nice finish, somewhat akin to Philidor's legacy: a Q-sac blocking an escape square and a double check (but in reverse order).

EDIT: Completely missed the second, even more handsome line of 64...Kg8 65.Qh8+ Bxh8 66.Nh6# - bummer!

Apr-28-15
Premium Chessgames Member
  offramp: Analysis by Stockfish 7.9 (128-bit) 94-way multi-processor: 1.Qh6#
Apr-28-15  Mating Net: Nice call on the puzzle prediction <leow> well done.
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