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Hans Johner vs Aron Nimzowitsch
Training Match vs Johner (1931), Bern SUI, rd 1, Feb-28
Queen's Gambit Declined: Modern. Knight Defense (D51)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Mar-10-20
Premium Chessgames Member
  samvega: Went for the inferior 25. Nc6, which I'm going to pretend to myself is more aesthetic than the correct move.
Mar-10-20  Granny O Doul: I think, aside from not winning a pawn and not wrecking Black's structure, that 25. Nc6 is less æsthetic than the other move, because Nxg6, if we ignore the fact that White threatens Qd4+, looks like a knight sacrifice while Nc6 does not.

It is good enough to win, though.

Mar-10-20  jith1207: Nc6 looks great, didn't even notice that even as I tried the feeble Nc3 before finding the solution.

As for an argument on which move is aesthetic, please follow the proper <CG> guidelines on similar discussion found here:

I A Horowitz vs NN, 1940

Mar-10-20  jith1207: So Nimzy lost the first round of the training match?

How did all that work out for him?

Mar-10-20  landshark: Did Nc6 too.
Mar-10-20  jith1207: We have a game collection, courtesy the Queen:

Game Collection: Nimzowitsch Bern 1931 Training Matches

Nimzowitsch got the record of +9-2=3

Mar-10-20
Premium Chessgames Member
  agb2002: The black rooks are defenseless (that one on c5 is defended once but attacked once) and the white knight avoids the fork with check from d4. Therefore, 25.Nxg6:

A) 25... fxg6 26.Qd4+ and 27.Qxc5 + - [R+P vs n].

B) 25... Nf6 26.Qxa8 + - [R+P vs n].

C) 25... Rxc1 26.Nxe7 Rxf1+ 27.Kxf1 + - [Q+P vs r] (27... Nxe7 28.Qxa8).

D) 25... f5 26.Nxe7 fxe4 27.Rxc5 Nxe7 28.Re5, wins another pawn, + - [R+2P vs n].

Mar-10-20  Walter Glattke: Queen overloaded with guarding and self-defense, therefore 25.Nxg6 (gardez) fxg6 26.Qd4+ Kh7 27.Rxc5 R+P for N. 25.-Rxc1 26.Nxe7 Rxf1+ 27.Kxf1 Nxe7!? 28.Qxa8, 27.-Rd8 QP for R decisive material 25.-Nf6, not Nxe7 Nxe4 Rxc5 Nxc5 but 26.-Qxa8 threatens mate on h8. "Resign" with 25.-Qf6 26.Rxc5 Rd8 27.Nxe5 decisive material
Mar-10-20  saturn2: I looked at
25. Nxg6 fxg6 
(black queen moves yield pawn for nothing, counterattacking the white queen same) 26. Qd4+ Kf7 and the rook on c5 falls.
Mar-10-20  BwanaVa: I went with 25. Nc6. So would Nimzo. ;-)
Mar-10-20
Premium Chessgames Member
  chrisowen: My bad gone?
Mar-10-20  jith1207: <chrisowen: My bad gone?>

Did you add yourself to ignore list, just like everyone else has?

Mar-10-20
Premium Chessgames Member
  chrisowen: Wow one night mattress um?
Mar-10-20  RandomVisitor: After 22.Qxe4 black has 22...Nd7:


click for larger view

Stockfish_20030407_x64_modern:

<64/98 12:03:12 +0.16 22...Nd7 23.Rc3 Rab8> 24.Qc2 a5 25.h3 Rb5 26.Rc1 Rc7 27.Qd2 Qd6 28.R1c2 Rc8 29.Rc4 Qb8 30.a4 Rb3 31.Qxa5 Rxb2 32.Qc3 Rb3 33.Qe1 Qd6 34.Qa1 Qd5 35.R4c3 Rb4 36.Rb2 Rxb2 37.Qxb2 Ra8 38.Ra3 Kg8 39.Qd2 c5 40.dxc5 Nxc5 41.a5 Qxd2 42.Nxd2 Kg7 43.Kf1 Na6 44.Ke2 Rc8 45.f4 f5 46.h4 Kf6 47.Ke3 Rc2 48.Kd3 Nb4+ 49.Ke2 Na6 50.g3 g5 51.fxg5+ hxg5 52.h5 f4 53.gxf4 gxf4 54.Kd1 Rb2 55.Rh3 Kg7 56.Rh4 Ra2 57.Rxf4 Rxa5

Mar-10-20  goodevans: <jith1207> Funniest thing I've heard today!
Mar-10-20
Premium Chessgames Member
  scormus: <jith1207> nice one!
Mar-10-20
Premium Chessgames Member
  PawnSac: I looked at the puzzle on the front page and thought:

Well lets see.. The only check available is Qxg6?? but that doesn't work. How bout Nxg6 ? Well what do ya know. It DOES works!

LOL

Mar-10-20
Premium Chessgames Member
  PawnSac: < Granny O Doul: 25. Nc6 is less æsthetic ... It is good enough to win, though. >

Ironically, I did not even consider Nc6 since i came at the puzzle from a different direction. Many people first count material. I don't. I usually look for all possible checks first. Maybe it was a fluke that i stumbled on the solution in like 5 seconds. After seeing that Nxg6 works, and that ..fxg6 is forced, there was no need to go further. Of course if i was in a real game, i probably would have spent a few seconds scanning other possibilities, but only a few. Now..

Had i not looked for checks first, and saw that Nc6 works, the next natural step is to check the mirror image move Nxg6! which is better for several obvious reasons. Either way, you get back to the better move Nxg6 IF you consider all possible checks, AND when it comes to knights, look at mirror image. Just a tip to remember.

Mar-10-20  TheaN: Straightforward Tuesday, White threatens and executes the double attack 25.Nxg6 with both Nxe7 and Qd4+, and Black can't prevent both. Perhaps only the zwischenzug 25....Nf6 is worth a mention (missed it), but then Ra8 is hanging, 26.Qxa8 +-. After the prosaic 25....fxg6 26.Qd4+ +- White is winning, the rest is worse.
Mar-10-20  TheaN: Actually, 25....Nf6 does prevent 26.Nxe7 Nxe4 ⩲ but not 26.Qd4 as Black will still lose a tempo preventing Nxe7. 26.Qxa8 is more direct but Qd4 is just as good.
Mar-11-20  RandomVisitor: After 17.Be4 black can play 17...Nxe4


click for larger view

Stockfish_20030407_x64_modern:

<49/70 19:00 -0.62 17...Nxe4 18.Nxe4 Rfd8> 19.Bc7 Rdc8 20.Be5 Bc6 21.h3 Nd5 22.Rac1 Rd8 23.Bxg7 Kxg7 24.Ne5 Be8 25.Qd2 Rac8 26.Rfe1 Rxc1 27.Qxc1 Qc7 28.Qd2 b6 29.Nc3 g5 30.Ng4 Qf4 31.Qd3 Nf6 32.Nxf6 Qxf6 33.Rd1 Bc6 34.Qe3 Qf4 35.Qxf4 gxf4 36.f3 a5 37.Kf2 Kg6 38.Ne2 Kf5 39.Rc1 Bb5 40.Rc7 Rd7 41.Rxd7 Bxd7 42.g3 fxg3+ 43.Nxg3+ Kf6 44.Ke3 Ke7 45.b4 Bc6 46.bxa5 bxa5

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