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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

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Apr-28-15  lost in space: I have nothing to add to what <M.Hassan> posted.
Apr-28-15
Premium Chessgames Member
  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
Premium Chessgames Member
  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
Premium Chessgames Member
  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  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  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.
Apr-28-15
Premium Chessgames Member
  Penguincw: I got the puzzle, after some thought. 64.Qh6+ Bxh6 65.Ng5++ (double check) Kh8 66.Rh7# 1-0.

However, I continued to stare at the position, and realized I had previously visited this game before on March 15th via. "Hot Games".

Unfortunately, Wednesday puzzles onward are just...

P.S. Notice how I indicated double check with 2 plus signs. Do any of you have some special way to indicate double check, or you just put one check? Just wondering. :)

Apr-28-15  TheaN: <Penguincw:

P.S. Notice how I indicated double check with 2 plus signs. Do any of you have some special way to indicate double check, or you just put one check? Just wondering. :)>

That is an interesting question: I use ++ and official rules seems to indicate both + and ++ are fine. The notation wiki might be of use:

http://en.wikipedia.org/wiki/Algebr...

The only problem with the ++ notation is that it can be confused for both double check and checkmate: hence the reasoning to use # (or ‡) uniformly. Double mate is not used as mate and double mate are not essentially different.

Apr-28-15
Premium Chessgames Member
  mjmorri: The final position is instructive. The White pieces coordinate beautifully, while the Black pieces are scattered and interfere with the Black King's escape.
Apr-28-15  YetAnotherAmateur: Very cute: 64. Qh6 Bxh6 (forced) 65. Ng5+ Kh8 66. Rh7#

My eye got drawn to the possibility of Ng5, but I realized that an immediate 64. Ng5+ Kh6 65. Nf7+ Kh7 ... is just a draw. Why do that when you can mate in 3 by using the other checking move?

Apr-28-15
Premium Chessgames Member
  Willber G: <M.Hassan:
...
Black can stay slightly longer if White Queen is declined:

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

Not if white plays:

65.Qh8+ Bxh8
66.Nh6#

Apr-28-15
Premium Chessgames Member
  kevin86: Move 64! A late move for a Reti-Tartokower theme:

1 move Queen sac
2 double check
3 mate on the focus square of the double check.

Apr-28-15  Tiggler: Like many others, I missed the nice mate in 3 when black plays Kg8. Mate in four is good enough, but not so tasty.
Apr-28-15
Premium Chessgames Member
  whiteshark: You gotta love dubble cheques.
Apr-28-15  MindCtrol9: It did not take me any time because I saw this puzzle just a few days ago.I think is the same.
Apr-29-15  offramp: During a tournament in Avoine, France, I underpromoted to a knight with a double-check. The notation was 51.g7-g8=C++.

A reader of Europe Echecs thought this was a coded message that I was an expert in C++.

He sought me out and employed me. I made a fortune!

What is C++?

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