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Yuri Krupenski vs Boris Gelfand
Paul Keres Memorial (2016), Tallinn EST, rd 2, Jan-08
Nimzo-Indian Defense: Simagin Variation (E46)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jan-29-16  Naderone: Simply 26. fxg3!
Jan-30-16  KernelChikn: Silly me...the diagram I was working from was a misprint and omitted the White ♖ on a1... :o
Jun-30-17  NBZ: gxh5 Rxh4 and now I want to make use of the g6 square (which looks very ripe) and the back rank (which looks very barren). Aha: f6! Bxf6 Re8+ Kh7 Qg6+! fxg6 Bg8+ wins.
Jun-30-17  nalinw: This is one of those puzzles that makes me gnash my teeth %^$#$#@@%^& - six more or less forced moves but I can't see it!
Jun-30-17
Premium Chessgames Member
  patzer2: Today's Friday puzzle solution is the obvious 24. gxh5, which leads to a clever mate after 24.gxh5 Rxh4 25.f6 Bxf6 (25...g6 26.hxg6 Bxf6 27.gxf7+ Kf8 28.Re8#) 26.Re8+ Kh7 27.Qg6+ fxg6 28.Bg8+ Kh8 29.Bf7+ when Black resigns in lieu of 29...Kh7 30.Bxg6#.

Black's decisive mistake was attempting to over complicate matters with the tactical 23...Nh5?, allowing 24. gxh5 .

Instead, Black has the better game after the strong positional move 23...Ndb5 , as play might go 23...Nbd5 24. Bxd5 Nxd5 25. Nxd5 Rxd5 26. Rae1 f6 (-1.14 @ 35 depth, Stockfish 8.)

Jun-30-17  Walter Glattke: 25.-Bg3 26.Re8+ Kh7 27.Ne4 Bxf2+ 28.Qxf2
R3xh3 29.fxg7 unclear, nice complicated!!
Jun-30-17
Premium Chessgames Member
  agb2002: White has the bishop pair for a bishop and a knight.

Black threatens Nf4.

This threat and the possibility of exploiting the weak square g6 suggest 24.gxh5 Rxh4 (else drop a piece) 25.Rae1:

A) 25... Bf4(6) 26.Re8+ Kh7 27.Qg6+ fxg6 28.f(h)xg6#.

B) 25... Nd7 26.Qg6

B.1) 26... Rdxh3 27.Qxf7+ Kh7(8) 28.Qg8#.

B.2) 26... Nf8 27.Rxe5 Nxg6 (27... Qxe5 28.Qxf7+ Kh7(8) 29.Qg8#) 28.hxg6 Rd8 (28... Rg3+ 29.Kf1) 29.Re8+ Rxe8 30.Rxe8#.

B.3) 26... Rd5 27.Nxd5 wins decisive material (27... fxg6 28.Nxc7+ + - [R]; 27... cxd5 28.Bxd5 Nf6 29.Rxe5, etc.).

C) 25... Bd6 26.f6

C.1) 26... g6 27.Qxg6+ Kh8 28.Bxf7 wins.

C.2) 26... Bf8 27.Re8 wins.

Jun-30-17
Premium Chessgames Member
  agb2002: My 25.Rea1 is met with 25... Rxh5. However, according to Stockfish, after 26.h4 Rxf5 27.Bf1 White retains a winning advantage of about +1.8.
Jun-30-17
Premium Chessgames Member
  WorstPlayerEver: It's a mess.
Jun-30-17
Premium Chessgames Member
  gofer: The start is pretty forced. We certainly don't want to go down the route of allowing <24 ... Nf4!>.

<24 gxh5 Rxh4>
<25 f6! ...>

25 ... g6?
26 Qxg6+ Kh8
27 Qg7#

So, there seems to be three possible defences to this...

25 ... Bxf6
26 Re8+ Kh7
27 Qg6+!!! fxg6
28 Bg8+ Kh8
29 Bf7+ Kh7
30 Bxg6#/hxg6#

25 ... Rg3
26 fxg3


click for larger view

25 ... Bg3
26 Re8+ Kh7
27 Bb1!


click for larger view

Jun-30-17
Premium Chessgames Member
  diagonalley: fabulous... simply fabulous...
Jun-30-17  dullmove: Incredible sequence of forced moves
Jun-30-17  mel gibson: I like that.
The checkmate was from a mistake by black.
The computer says:

24. gxh5 (24. gxh5 (g4xh5
♖d4xh4 f5-f6 ♖d3-g3 f2xg3 ♖h4xh5 f6xg7 ♗e5xc3 b2xc3 ♘b6-d5 ♗a2xd5 ♖h5xd5 ♕g2-f2 ♖d5-d3 ♖e2-e3 ♖d3xe3 ♕f2xe3 ♔g8xg7 ♖a1-f1 ♕c7-d7 ♕e3xa7 f7-f6 ♕a7-d4 ♕d7-e6 a3-a4 ♔g7-f7 ♔g1-g2 ♔f7-g6 ♕d4-d3+) +5.66/17 129)

score for white +5.66 depth 17

Jun-30-17
Premium Chessgames Member
  patzer2: Had fun going over this combination with my eight and eleven year old grandsons today.

We worked the combination move-by-move backwards from the mate-in-one after 29...Kh7 30. Bxg6# or 30. hxg6#, until they could see all the variations up to six or seven moves deep after 24. gxh5 Rxh4 25. f6! .

Then we discussed why the positional move 23...Nbd5 was better than the flawed tactical attempt 23...Nh5?

My young grandsons found this to be a highly instructive game for studying both tactics and positional play.

Even though it's with the benefit of lots of time and 20-20 hindsight, the grandsons find it cool that they can now see tactics and a combination missed by a world-class Super GM whom they highly admire and respect.

Thanks chessgames.com for this excellent choice for a Friday puzzle.

Jun-30-17
Premium Chessgames Member
  kevin86: nice puzzle
Jun-30-17
Premium Chessgames Member
  kevin86: The queen sac allows the pawn to mate.
Jun-30-17
Premium Chessgames Member
  chrisowen: Lows h5s hourus luv h4s hoods f6s fluffus lunks vow by fords 25...Bxf6 cages fluffus lunks vow bud mate 5 ave by glums 25...Rg3 cage gout 3 4 ousts conts mint vote vim e8s evermores lunks o h7s hungoffs von guv g6s gruffon our von guv g6s gutlogs g8s ghosthunt lunks huh h8s harangues by flunghung 29.Bf7+ apathy fluffout ok von guv bud mate 1 ave lows tone vent bma eg v quayside vims kid fjord food flock mind jangle vote copa viva co harp ave lows h5s hourus whoosh toss tone vent nub von guv i bma mug gm vine bents will gets every vanquish quayside vim flick food vide mind jangle vote jock copa viva apply plush ar harp it's vast flav viva thane yip mind it's vast hate nip my empathy in heap minty name pithy hints flavs neap thymi hap enmity yin tympani eh pa thymine good von guv pain thyme h5s hourus gift best vims by hulk 24.gxh5 Rxh4 25.f6 Bxf6 cages fluffus bud mate 5 ave mins vote off boff buff cuff duff huff guff nuff puff fordus fount h5s hoodus flush hoof huffs hups hunts hosts over vim by glums 25...Rg3 cage gout 3 4 ousts conts mint vote vim by eggers 26.Re8+ jud gate evermores vim by huntus 26...Kh7 27.Qg6+ jastha gufflog by guffaws 27...fxg6 28.Bg8+ aloof by ghosthunt lo harangue 28...Kh8 29.Bf7+ apathy fluffout ok von guv bud mate 1 ave yuck bog bug grub uvs bonk buck glock guy vide go yo criminated it's vast flav viva thane yip mind vote vim focus fine vine coffin vide vet flimsy coil vide coiffeurs like hair hic c do g6s guffarc you overs bud junk of munch nimble vide bunt vide bottom blotch hood flush dutch food hud hod fond chord rod ruddy curd doc by het 23...Nh5 co det huffon 3 4 ousts conts mint vote vim by dug 23...Nfd5 co det dontus know 1 ousts conts mint vote vims um glock gotcha grin vim axe flock did lows h5s hourus;
Jun-30-17  RKnight: What a wonderful puzzle today! From an ungainly-looking position comes great art, including the mating combination via the queen sac. The saying "making a silk purse out of a sow's ear" comes to mind.
Jun-30-17
Premium Chessgames Member
  bubuli55: Nice Q sac. Saw that coming with 25.f6
Jun-30-17  RandomVisitor: After 22.Qg2 black has a nice move he missed - who can find it?


click for larger view

Jun-30-17
Premium Chessgames Member
  morfishine: This is a flawed problem since it starts with an obvious weak back rank for Black

*****

Jun-30-17
Premium Chessgames Member
  ChessHigherCat: <RandomVisitor: After 22.Qg2 black has a nice move he missed - who can find it?>

22...Rxc3 23. bxc3 (Rxd5 Qxd5 24. bxc3 Qxc3) Bxc3?

Jun-30-17  CountryGirl: Great result for a lowly FM !
Jun-30-17
Premium Chessgames Member
  DarthStapler: I got the first two moves and the general idea
Jul-02-17
Premium Chessgames Member
  ChessHigherCat: <Random Visitor> Wuzdad it or wuzndad it?
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