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Kacper Piorun vs Mateusz Bartel
Bundesliga (2014/15), Dresden GER, rd 7, Dec-05
Queen's Indian Defense: Kasparov-Petrosian Variation. Kasparov Attack (E12)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jan-14-16  patfoley: Elegant combination! It eluded me.
Jan-14-16
Premium Chessgames Member
  agb2002: White is one pawn up.

Black threatens 32... Rxe5 and ... Kxh4, although the bishop is momentarily immune (32... Kxh4 33.Rh7#).

This detail suggests the possibility of creating a mating net with 32.Bg6, which already threatens mate in one:

A) 32... Rxe5 33.Bd3 Be4 (or 33... Re4) 34.Bxe4 Rxe4 35.fxe4 + - [R+P vs N].

B) 32... Rd1+ 33.Kh2 and mate in two.

Jan-14-16  Cheapo by the Dozen: What happens if Black simply snatches the d-pawn on Move 23? White has no quick rebuttal that I can see; on the other hand, the diagonals pointing at his king are scarily open.
Jan-14-16
Premium Chessgames Member
  patzer2: Instead of the decisive mate threat 32.Bg6!! Rxe5 33. Bd6! (+ 10.19 @ 35 depth, Stockfish 240814), I went for the knight fork 32. Ng4+?! Kxh5 33. Nf6+ Kxh4 34. Nxd5 Bxd5 = (-0.09 @ 28 depth, Deep Fritz 15).

Black's game took a turn for the worse with 23...f4? allowing 24. Ng4 to (+1.58 @ 37 depth, Stockfish 240814).

Instead, 23...Bxd5 = (0.00 @ 34 depth, Stockfish 240814) holds the position.

Jan-14-16  diagonalley: <diagonalley>: nul points :-(
Jan-14-16  wooden nickel: White seems to be in a predicament, my first attempt to save a piece was 32.Ng4+ Kxh5 33.Nf6+ Kxh4 34.Nxd5 Bxd5 35.Rxa7... but that's not enough... then I found 32.Re7! which protects the knight... if KxBh5, then 33.Rh7#. The text line 32.Bg6! tops it all!
Jan-14-16
Premium Chessgames Member
  Oxspawn: I took a long look at 32. Re7 and more briefly at 32. Bg6 with a view to following it with h5, but then decided that resigning could be the only solution to this problem. I never even suspected I have stumbled on the right first move and after I played through to Bd3 it took an age for the penny to drop. Genius.
Jan-14-16  morfishine: <32.Bg6> overwhelms <h7> & with <g5> covered by White's h-pawn, Black King is hemmed-in

*****

Jan-14-16  Nichth: Didn't get this continuation as I was hung up on the drawish 32.Ng4+ Kxh5 33.Nf6+ Kxh4 34.Nxd5 Bxd5 35.Rxa7 where white, with R+3P v B+N+2P has a pinned down enemy king. Oh well.
Jan-14-16  saturn2: I did not see the elegant mate threat Rh7, the pawns on h4 and f3 denying the king the g file. My idea was 32 Ng6, the Bishop cannot be taken because of the fork. If white protects the pawn f4 by for instance 32...Rd4 I would have taken the pawn anyway 33 Nxf4. Now if either 33.. RxN or 33..KxB white has connected free pawns and this should at least compensate the piece if not more.
Jan-14-16  CHESSTTCAMPS: In this endgame position, white's pawn advantage seems small consolation to the loss of a piece that is progress, with both minor pieces under attack and unable to protect each other. But white can find the best form of compensation in the black king's vulnerable position on the edge.

32.Bg6!! Rxe5 (Rd7 is the only other defense to Rh7#) 33.Bd3! and now black has only losing defenses to stop 34.Rh7#:

A. 33... Be4 34.Bxe4 Rxe4 35.fxe4 Kg6 (Kh5 36.e5 promotes the e-pawn) 36.e5 Kf5 37.h5 and one of white's separated passed pawns will promote.

B. 33... Re4 34.Bxe4 Bxe4 35.fxe4 transposes to A.

C. 33... Re1+ 34.Kf2 and black must transpose to A or B (with white's king position improved) to stop a quick mate.

Another edge mate pattern to know...

Jan-14-16  CHESSTTCAMPS: <<agb2002>:..although the bishop is momentarily immune..> An important point to make. As for "en prisity" <Phony Benoni>, I wish I'd thought of that!
Jan-14-16
Premium Chessgames Member
  kevin86: White sets up a mating net with the rook and bishop (the knight is not needed); there is no escape.
Jan-14-16  stst: Purely visual, no picture... may lose sight eventually¡K

Black K is almost locked, and W N might get to fork K & R:

(I)32.Bg6 eyeing for Rh7+ and mate(?), but RxN makes the WB losing support 33.h6 to give the B-P a strong couple but then Rh7+ „» Kg5 And White¡¦s attack dissipates momentarily, yet after 34.Bd3 (back track, still threatening Rh7+ & mate) Black has no forceful rebuttal¡K

(II)
32.Ng4+ KxB (forced)
33.Nf6+ forks
If (A)..... KxP ==> 34.Rh7+ and NxR next, BxN but W exchanges up. (B)......Kg6 ===>34.NxR and W P can march down h file.

The R-sac
34.Rh6+ KxR
does not seem to compensate White for anything after

Jan-14-16  siggemannen: Really hard puzzles this week :( Went for patzer2's drawing line
Jan-14-16
Premium Chessgames Member
  gawain: I concur with <patfoley>. Elegant combination--and it eluded me, too.
Jan-14-16  mel gibson: Didn't see it - a brilliant ending.
Jan-14-16  dark.horse: This week has been a learning experience. Today's lesson: a small force (B+P) can confine the Black king to the edge of the board.
Jan-14-16  dfcx: very elegant but did not see it, my streak from the 4th of this month ends.
Jan-14-16  Tiggler: Could not find the elegant win, but was content to find the woodpusher's way to win:

32.Re7 protects the knight and if Rxe5, then 33.Rxe5 protects the bishop, which is immune so long as the knight is on e5.

Black has few useful moves: the rook has to stay on its 4th rank, because of the mating threat of Bg6, and the black king has no moves. White's plan is to advance the king to g4. After the black f-pawn falls the black king will be overwhelmed by the advance of the passed white pawns.

After 33.. Nc6 34.Nxc6 Bxc6 35. Bg4 the win is straitforward.

Jan-14-16
Premium Chessgames Member
  johnlspouge: < <Phony Benoni> wrote: I don't know if there is a big difference between <33.Bd3> or <33.Bc2>. >

Not according to Stockfish. It's interesting that nobody else mentioned the possibility that 33.Bc2 is equivalent to 33.Bd3.

Jan-14-16  morfishine: <Tiggler: Could not find the elegant win...> A win's a win

*****

Jan-14-16  Herma48852: I don't think I would have ever found 32. Bg6!. I couldn't even find the follow up after .. Rxe5. Very, very humbling.
Jan-14-16  cjgone: Wow, completely missed it today.
Jan-14-16  PJs Studio: These line clearings, plus rerouting of a very poorly placed piece (Bh5) to a fantastic position which sets up an unavoidable model mate...?

NOT easy!

I kept looking at Ng4-f6xRd5

I'm glad to see this beauty was dreamed up by a 2600 player.

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