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Hikaru Nakamura vs Veselin Topalov
World Championship Candidates (2016), Moscow RUS, rd 7, Mar-19
Slav Defense: Quiet Variation. Schallopp Defense (D12)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Given 11 times; par: 36 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Mar-25-16  Everett: <
memberMar-19-16 Amulet: This is how chess should be played, like the UFC, always on the lookout to grab somebody's ..... Just like Spassky's advice to Fischer on playing Korchnoi, "grab his balls and squeeze it just enough, not too much but just enough, then somewhere something must give in".>

How lies get started. The truth is Spassky gave that advice to Lasker to defeat Steinitz.

Mar-25-16
Premium Chessgames Member
  perfidious: For me that quote is analogous to Amarillo Slim's

<You can shear a sheep many a time, but you can only skin him once.>

Mar-25-16
Premium Chessgames Member
  TheFocus: I thought that Lasker won by kicking Steinitz in his gouty leg?
Mar-25-16
Premium Chessgames Member
  perfidious: They were gentlemen in the nineteenth century: that little manoeuvre was, I believe, supposedly employed in Korchnoi-Petrosian, 1974.
Mar-26-16  King.Arthur.Brazil: Giusslouie: I mean that move is 26. Rb2 ... what black will do after Rb2. My computer was with some bugs with new x old versions of software, then I write all out side the screen and comeback to publish directly without check that the move number was 26, instead of my 27. Sorry.
Oct-27-17  Kyudaime: 37. Rg5! will prevent the knight check.
Oct-27-17  newzild: I got the first move, and the third and final move, but instead of 38. Rxd1 I prefered 38. Qb3. The point is to defend against the Ng4+ windmill.

Note that 37. Rb4?? fails to 38...Qh3+!

Oct-27-17  wtpy: So I miss Tuesday and wednesday problems, something I almost never do. Tuesday because i took 15 seconds to see an exchange win that wasn't and Wednesday because I didn't calculate deeply enough to see a stinger. Yesterday's endgame was interesting but not terribly difficult and today the question is can you find a defensive move,and I could; so maybe not quite ready for nursing home. (Missing early in the week chess problems will be a good test of my inevitable cognitive decline, but I had hoped it wouldn't start until a few more years down the road.)
Oct-27-17
Premium Chessgames Member
  patzer2: Got the first move of today's Friday (37. ?) puzzle, as it's clear White must first play defense with 37. Rg5 due to the threat of 37...Ng4+ 38. Kh3 Nxf2+ 39. Kh2 Qh3#.

Also got the second move as 38. Rxd1 removes another potential mate threat after 38. Rb7? Rh1+ 39. Kxh1 Qh3+ 40. Kg1 Qg2#.

However, because I moved too quickly on the third move with 39. Re5? I missed 39...Qf1! -+ which throws away White's win and allows Black to turn the tables with a quick forced mate .

Necessary instead is the game move 39. Qf4 +-, threating 39...Qf1? 40. Qxf3 +- and giving White a decisive material advantage.

P.S.: For a Black improvement, ditching 32...Kh7? 33. Kh2 +- (+2.44 @ 24 depth) in favor of 32...Nf6 = (0.00 @ 24 depth) is the recommendation of our Stockfish engine feature.

Oct-27-17
Premium Chessgames Member
  agb2002: White has a rook and a bishop for a knight and a pawn.

Black threatens Ng4+, winning.

This suggests 37.Rg5:

A) 37... Rxb1 38.Qxb1 Ng4+ 39.Rxg4 Qxg4 40.Qd3 followed by Qd4 and Qe4 or Qf4, etc.

B) 37... Ne4 38.Rxd1 Qxd1 39.Qf4 looks winning (39... Nxf2 40.Bxf2 Qe2 41.Qe3).

Oct-27-17  Walter Glattke: 37.Rxd1 Ng4+ 38.Kh3 Nxf2++ 39.Kh2 Qh3+
40.Kg1 Qg2#
37.g4 Nxg4+ 38.Kg3 Nxe5 39.Rxd1 Qg4+
40.Kh2 Qg2#
so 37.Rg5
Oct-27-17  gofer: Today's POTD is less about attacking and more about defending. So many white moves lead to mate for black that it is just a process of elimination to remove those and see what's left.

37 Rb4? Qh6+!
38 Kxh6 Rh1#

37 Rxd1 Ng4+
38 Kh3 Nxf2++ (Kg1/Kh1 Qxd1#)
39 Kh2 Qh3+
40 Kg1 Qg2#

37 Rd5 Ng4+
38 Kh3 Nxf2++
39 Kh2 Qh3+
40 Kg1 Qg2#

37 g4 Qxg4
38 Rh4+ Nxg4 (Rg5 Qxh4# or Rxd1 Qg2#)
39 Qg3 Nxg3 +-

37 Re6 Ng4+
38 Kh3 Qxe6 mating (due to Rd1 being immune i.e. Rxd1 Nxf2++ 39 Kh2 Qh3+ 40 Kg1 Qg2#)

So having discounted all other defensive moves I can only see one that might work.

<37 Rg5 ...>

Now Ng4+ is no longer available, so it looks likely that we will trade off pieces into a winning endgame or black will have to lose its attack on our back rank and in doing so lose any chance of winning - perhaps. One continuation which seems good for white is...

37 ... Ng4+
38 Rxg4 Rxb1
39 Qxb1 Qxg4 +-

~~~

Perhaps I should had dug a little deeper, <37 Rg5> is really only half the POTD solved...

Oct-27-17
Premium Chessgames Member
  morfishine: Forced is <37.Rg5> breaking up Black's counterplay combination

*****

Oct-27-17
Premium Chessgames Member
  malt: Had <37.Rg5>
37...Ng4+ 38.R:g4 R:b1 39.Q:b1 Q:g4
40.Qb7 Qe6 41.Qc7 and 42.Qd6
Oct-27-17  Lambda: I was thinking this was about taking on d1 then playing g4 to let the king out, but I didn't see the double check on f2.
Oct-27-17  raju17: Why resign 39...Qf1 and black mates next move.
Oct-27-17  ninja warrior: If 39...Qf1 then 40.Rh5+ forces the knight and f3 pawn off, leaving black with a hopeless endgame.
Oct-27-17
Premium Chessgames Member
  beenthere240: On 39...Qf1. Simply 50 Qxf3 and the mate threat has disappeared. Black can win the exchange with NxR but will still remain a whole bishop down.
Oct-27-17
Premium Chessgames Member
  kevin86: White pulls it out of the fire!
Oct-27-17  Walter Glattke: to gofer: 37.Rb4? (Qh6 not understood)
37.-Rh1+ 38.Kxh1 Qh3+ 39.Kg1 Qg2#
Oct-27-17
Premium Chessgames Member
  Jimfromprovidence: <Walter Glattke> <to gofer: 37.Rb4? (Qh6 not understood)37.-Rh1+ 38.Kxh1 Qh3+ 39.Kg1 Qg2#>

He meant 37 Rb4 Qh3+.


click for larger view

Then comes 38 Kxh3 Rh1#

I thought of 37 Rb4 to protect g4 too.

Oct-27-17  Cheapo by the Dozen: Everybody seems to have a different refutation to Rb4??? I dismissed it because of ... Rh1+/Qd1+/Qf1. I never bothered to check for quicker mates. :)
Oct-27-17  mel gibson: Very tricky game - if White makes any of a number of good looking moves he gets checkmated!

The computer agrees with the solution move for white:

37. Rg5 (37. Rg5 (♖e5-g5
♘f6-g4+ ♖g5xg4 ♖d1xb1 ♕b8xb1 ♕d7xg4 ♕b1-b8 ♕g4-e4 ♕b8-f4 ♕e4-d5 g3-g4 f7-f5 g4xf5 g6xf5 ♔h2-g3 ♔h7-g8 ♕f4-b8+ ♔g8-h7 ♕b8-e8 f5-f4+ ♔g3xf4 ♔h7-h6 ♔f4-g4+ ♔h6-h7 ♕e8-h5+ ♕d5xh5+ ♔g4xh5) +3.75/23 58)

score for white +3.75 depth 23

Oct-27-17  DarthStapler: Rg5 was the only move I could think of but that didn't look decisive so I kept trying to find something better
Oct-28-17  Mozart12: I,like what I see!
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