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



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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jan-29-16  KernelChikn: Yes, but how does White proceed after 25. ... ♖g3 - ?
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  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  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  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  WorstPlayerEver: It's a mess.
Jun-30-17  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  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  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 for this excellent choice for a Friday puzzle.

Jun-30-17  kevin86: nice puzzle
Jun-30-17  kevin86: The queen sac allows the pawn to mate.
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  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  morfishine: This is a flawed problem since it starts with an obvious weak back rank for Black


Jun-30-17  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  DarthStapler: I got the first two moves and the general idea
Jul-02-17  ChessHigherCat: <Random Visitor> Wuzdad it or wuzndad it?
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