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Gedeon Barcza vs Octavio Troianescu
Karlovy Vary / Marianske Lazne (1948), Karlovy Vary CSR, rd 8, Jun-??
Zukertort Opening: Queen Pawn Defense (A06)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Feb-06-12  backrank: Such a great game and no kibitzing?

It's been awarded a 1st brilliancy prize!

After 20. Rd1, White threatens Rxd7, so after 21. Ne4!, the knight is untouchable, and f6 cannot be defended any longer.

In the final position, Black resigns due to 23. ... Rg8 24. Qxh7+! Rxh7 25. Rxg8#!

Aug-07-12  LoveThatJoker: "21. ?" White to play and win, would make for an excellent Friday/Saturday puzzle.

LTJ

PS. According to Stockfish, White's advantage is too great after 21. Ne4 Qc6 (Black's best try to stay in the game)

Analysis Diagram - Position after 21...Qc6


click for larger view

22. Nxf6 Qc2 23. Rxd5 exd5 24. Qh6 Rg8 25. e4 Qc1+ 26. Qxc1 <+7.15/28>

Aug-07-12  PeterThePatzer: I must be missing something. After 21. Ne4, why doesn't Black play f5?
Aug-07-12  LoveThatJoker: <PeterThePatzer> Good question! To answer it, I did not resort to Stockfish and came up with the solution myself.

21. Ne4 f5

Analysis Diagram - Position after 21...f5


click for larger view

22. Nf6!

Analysis Diagram - Position after 22. Nf6!


click for larger view

LTJ

Aug-07-12  erad1288: <PeterThePatzer> 22. Nf6 ends black's resistance. (22.Nf6 Nxf6 (...22 fxg4 23. Qxh7#) 23.Qxf6#) There is simply nothing black can do to prevent checkmate.
Aug-07-12  backrank: The square (not the pawn!) f6 can't be defended after 21 Ne4 (although it seems to be defended by the Nd7); this can't be changed by advancing the pawn (even if it attacks the Rg4 - it's just too late).

The line given by LTJ (or better: by Stockfish) above is more interesting: at a first superficial glance it looks good defending h7 by Qc2 and at the same time gaining a tempo (??) by attacking the Rd1. But the rook becomes a desperado, thus removing the dangerous Bd5 (and by this, avoiding a BACK RANK MATE by the black queen), and the defending queen is cut off by 25. e4, so that Black can resign. Very convincing.

However, i find the game continuation still prettiest, making a good Tuesday/Wednesday puzzle after 22 ... Rg7:


click for larger view

23 Qh6 Rg8 (forced! mate on g7 is threatened and after Rxg4 there comes 23 Qxh7#) 24 Qxh7+!! Rxh7 25 Rxg8#


click for larger view

Have I ever mentioned that I love mating patterns? ;)

It's a pity that this finish hasn't been played out in the game - but Troianescu was too strong a player himself not to see it immediately after 23 Qh6.

Aug-18-12  PeterThePatzer: LTJ, erad1288, and backrank, thank you all.
Mar-28-15  ToTheDeath: Great attack.

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