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Aron Nimzowitsch vs Georg Marco
Gothenburg (1920), Gothenburg SWE, rd 9, Aug-14
Philidor Defense: Hanham Variation (C41)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Oct-02-08  kirchhoff: Thanks to <JG27Pyth:>, <MostlyAverageJoe:>, <Once:>, and <Antonius Blok:>. I feel better about the time I put in trying to solve this.
Oct-02-08
Premium Chessgames Member
  whiteshark: Marco had some bad experience with the Philidor before: Alekhine vs G Marco, 1912
Oct-02-08  TheaN: 3/4

Critical positions ingame, but I missed it: reviewed Nxe5 only for a few moments, Nb5 longer. Neither seemed to work... >_>

Oct-02-08  zooter: I started at it for quite a while.

11.Nxe4 Qxe4 12.Nb5 Qb8 and black seems to have covered the mate threat. So how does white proceed?

Time to check

Oct-02-08  zooter: I started at it for quite a while.

11.Nxe4 Qxe4 12.Nb5 Qb8 and black seems to have covered the mate threat. So how does white proceed?

Oct-02-08  zooter: damn you and damn me..for some reason I thought that 12.Nb5 was good and 12.Nd5 was just bad as the knight is lost, but then again look at this:

11.Nxe4 Qxe4 12.Nd5 exd5 13.Bb5+ Bd7 14.Bxd7+ Nxd7 15.Bxd5 Nxd5

Is black really lost in this position? He has to give up at least 3 minor pieces to trap the queen in every variation. Correct me if i'm wrong

Oct-02-08  VooDooMoves: <zooter> Why not 11. Nxe5 Qxe5 12. Nd5 cxd5 13. Bb5+ Bd7 15. Bxe5 as the bishop is protected with pawn. Now black only has 2 pieces for the queen
Oct-02-08  TheBish: Yes! I solved this all the way to move 30. Ha! Seriously though, I did analyze the game line (among others) to 13. Ba3 as winning, and stopped there. Nice use of the discovered attack, and combining tactical themes (such as the Nc7 mate threat as well as the queen trap line).
Oct-02-08  sataranj: not my cup of tea
Oct-24-08
Premium Chessgames Member
  patzer2: For the Thursday Oct 2, 2008 puzzle solution, White plays the surprise decoy sham sacrifice 11. Nxe5!, which sets up a winning discovered attack after 11...Qxe5 12. Nd5! .

If 12...Qxb2?? or 12...Qe6??, then it's 13. Nc7#.
If 12...Qb8, then 13. Nxe7 Kxe7 14. Ba3+ Ke8 15. Bd6 Bg4 16. f3 Qd8 17. fxg4 is winning.

Oct-24-08  Nietzowitsch: Atypic, but he jumped at the opportunity.
Nov-23-18  stacase: Discovered attacks on the Queen are always fun.
Nov-23-18
Premium Chessgames Member
  ChessHigherCat: Well the two main candidates are Nb5 or Nd5, both of which look very promising because they threaten Nc7#. There's probably something faster but I found this:

12. Nb5 Qf4 13. e5 cxb5 14. exf6 Bxf6 15. Bxb5+ Bd7 16. Re1+ Kd8 17. Ba3 Bxa1 18. Bxf8 Kc7 19. Qxd7+ Kb8 20. Bd6+ Qxd6 21. Qxd6+ Kc8 22. Bd7+ Kd8 23. Bc6+ Kc8 24. Qd7+ Kb8 25. Qxb7#

Nov-23-18
Premium Chessgames Member
  ChessHigherCat: Oh well, I should have looked at Nd5 instead...
Nov-23-18  SpamIAm: Methinks we are all safe in condemning 9...Nf8?? as an awful move. 9...O-O was indicated.
Nov-23-18  Walter Glattke: 12.Nd5 Qxb2 13.Nc7# / 12.Nd5 Qd6 13.Ba3 Qd7 14.Nxe7 Qxd1 15.Raxd1 Be6 16.e5, white advantage is the option to 13.-cxd5.
Nov-23-18  drollere: i liked 12. Nd5 Qd6 13. e5. i looked at 13. Ba3 but thought c5 was a sufficient answer.
Nov-23-18
Premium Chessgames Member
  malt: 12.Nd5 Qb8
(12..Q:b2 13.Nc7# )
13.N:e7 Be6
(13...K:e7 14.Ba3+ c5 15.B:c5+ Ke8 16.Bd6 )
14.Nf5 B:c4
(14...B:f5 opens the e-file)
15.N:g7+ Ke7 16.Ba3+ c5 17.B:c5+ Qd6 18.Q:d6#
Nov-23-18
Premium Chessgames Member
  thegoodanarchist: 12.Nd5!!

What a beautiful move!

Nov-23-18  Walter Glattke: After 12.-Qb8 13.Nxe7 c5 14.Nf5 Bxf5 15.exf5 N8d7 is possible, with White attack, but maybe the white player planned here 13.Nxf6+ Bef6 14.Bxf6 gxf6 15.Qf3 so could follow 15.-Nh7 16.e5 f5 17.Qh5 0-0 18.Rae1 Be6 19.Re3 rather difficult, but Qb8 is not enough.
Nov-23-18  saturn2: Black has a piece more and a pawn less.

I saw 12. Nd5

12...Qxb2 13. Nc7#

12...Qb8 13. Nxe7 Kxe7 14. Ba3+ Ke8 15. Bd6

12...Qd6 13. e5 Qc5 14. exf6 cxd5 15. fxe7 Ne6 16. Bxd5 slight advantage for white

Nov-23-18  RKnight: Well, I got it through move 17, but wasn't sure this led to a win. Subsequent moves by both players do not look particularly optimal or inspired. Is there a better line after move 17?
Nov-23-18
Premium Chessgames Member
  agb2002: White has a pawn for a knight.

White has Nb5 and Nd5. In the case of 12.Nd5:

A) 12... Qxb2 13.Nc7#.

B) 12... Qb8 13.Nxe7

B.1) 13... Kxe7 14.Ba3+ Ke8 (14... c5 15.Bxc5+ just loses a pawn) 15.Bd6 + - [Q+P vs 2n].

B.2) 13... Be6 14.Nf5 Bxf5 (14... Bxc4 15.Nxg7+ Ke7 16.Ba3+ and mate in two) 15.exf5 with the bishop pair and a pawn for two knights and followed by Re1 looks far beter for White.

C) 12... cxd5 13.Bb5+ and 14.Bxe5 wins devisive material.

D) 12... Qd6 13.e5

D.1) 13... Qd7 14.exf6 Bxf6 (14... cxd5 15.Bb5 wins) 15.Bxf6 seems to win material (15... gxf6 16.Nxf6+ and 17.Nxd7; 15... cxd5 16.Bb5 wins; 15... b5 16.Bxg7 wins decisive material).

D.2) 13... Qd8 14.exf6

D.2.a) 14... cxd5 15.fxe7 Qxe7 16.Bxd5 ends up a pawn ahead with the better position.

D.2.b) 14... Bxf6 15.Nxf6+ looks wimning for White (15... gxf6 16.Qxd8+ Kxd8 17.Bxf6+ and 18.Bxh8).

Nov-23-18
Premium Chessgames Member
  patzer2: Black's decisive mistake was 9...Nf8?, allowing 10. dxe5 dxe5 11. Nxe5! +- (+1.95 @ 29 ply, Stockfish 9).

Instead 9...0-0 = (0.00 @ 31 ply, Stockfish 9) as in Davaademberel Nomin-Erdene vs K Winter, 2017 would have given Black a level position.

P.S.: Instructive game for novices, incorporating the discovered attack, knight fork threat, deflection, skewer and trapped piece tactics. For beginners, there's also an instructive two-move mate at the end of the game.

Nov-23-18  Mayankk: I saw Nd5 and the mating threats via Nc7 if Queen moves away. However after Qd6, I was too fixated on making e5 work and I totally overlooked Ba3...
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