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Octavio Figueira Trompowsky de Almeida vs Julius Nielsen
non-FIDE Munich Olympiad (1936), Munich GER, rd 12, Aug-24
Queen's Gambit Declined: Modern Variation (D50)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Apr-12-06  Richerby: I got 23.h7+ ♘xh7 very quickly (what else is there?) but discarded 24.♖xh7 early as I didn't see the mate. I looked fairly deeply at 24.♕h5 but that doesn't seem to get anywhere, either, so I gave up.

Moral: if shallow analysis suggests a move doesn't achieve anything, it can still be worth having a deeper look after you've discarded the other moves.

Apr-12-06  JustAFish: <Whitehat> It took me longer than the other folks on this forum to see the mating line. I think it goes 24 Qh5+ Kg8 25 Qf7+ Kh8 26 Ng6# If the king doesn't go to h8 right away, then bop it around with Qg6 followed by Qf7- it'll eventually fall into place. For some reason I mentally blocked the idea of the queen moving twice.
Apr-12-06  moppa: I'm surprised, got this instantly. It was the first line to look at when I saw the Nf7-threat.
Apr-12-06  tefjlives: Some people seem to be posting 26. Qg6+ when the K is on g8, but 26. Qf7+ is what you really want, then mate next move.
Apr-12-06  aroyni: If the rook is taken (KxR) then mate is unavoidable of course, but if 24...g4 although a knight is lost there is no mating attack fritz 9 gives the following nice varation with decisive adavantage for white

Octavio Trompowsky - Julius Nielsen, Munich ol (Men) 1936


click for larger view

Analysis by Fritz 9:

1. (5.34): 24...g4 25.Nxg4 Bg7 26.Ne5 Qg5 27.Qh5 Qxh5 28.Rxh5 2. (5.66): 24...Re7 25.Rh6

Apr-12-06
Premium Chessgames Member
  Gypsy: <tefjlives: Some people seem to be posting 26. Qg6+ when the K is on g8, but 26. Qf7+ is what you really want...> Right. But <wharfrat> anticipated us. :-)
Apr-12-06  belka: <I got 23.h7+ xh7 very quickly (what else is there?)>

Well, there's Kh8 and Kg7. Positionally, Black does NOT want to take the pawn. It's so grossly losing that I didn't really even consider Nxh7, actually. Opening the h file with all pieces save 1 on the back rank? And no pawn cover for the king? Considering this is a puzzle I should have looked for a forced win, but it's my lunch and I am feeling lazy.

Anyway, there is something else! Kh8 and Kg7. These are the moves I would want to make as black. Both lose because of the knight fork Nf7 (Kh8 directly, and Kg7 after h8=Q).

Personally, I think this fork is the more interesting motif of the puzzle, why the h file is forced open. This is just the way my brain understand chess I think.

Apr-12-06  EmperorAtahualpa: Got it again, I'm on a roll! :) This one took me 10 seconds or so.
Apr-12-06  The17thPawn: <jmelton> Do you plan on giving the winning combination or leaving us in suspense? I have looked at ...Bxd4: Bxc7,Bxb2+ Kxb2,Qc3+ Kb2,Na3# but that only holds together if black takes the rook. Help a patzer out <Jmelton>.
Apr-12-06  McCool: 24. Qh5 wins faster.
Apr-12-06  Everett: <belka <Anyway, there is something else! Kh8 and Kg7. These are the moves I would want to make as black. Both lose because of the knight fork Nf7 (Kh8 directly, and Kg7 after h8=Q).>>

The fork on f7 is obvious after Kh8, while after h8=Q# needs no fork at all.

In the final position, ...g4, blocking easy access by the white Queen, is the only defensive move I would try before soon resigning. As the computer points out, white is still up 5+ points.

Apr-12-06  LIFE Master AJ: Nice puzzle. (I got it.)

I hope you guys appreciate this site, I am sure someone spends (???) some amount of time, (I am not certain exactly how much.); looking for a problem every day.

Thanks Chess-Games for the puzzle, I don't think I had ever seen that one before.

Apr-12-06  apawnandafool: I would like to join in <LIFE MASTER AJ>'s enthusiasm for Chess-Games, as I also enjoyed this puzzle's company. I found this puzzle to be not the least bit mean-spirited or rude, just pleasant conversation, with a very agreeable nature. This was a very nice puzzle with which to spend some time. Thank You!
Apr-12-06  jmelton: <The17thPawn: <jmelton> Do you plan on giving the winning combination or leaving us in suspense? I have looked at ...Bxd4: Bxc7,Bxb2+ Kxb2,Qc3+ Kb2,Na3# but that only holds together if black takes the rook. Help a patzer out <Jmelton>.>

I was hoping more than one person would take a look at it before I posted a solution. I'll give people a hint first (don't look if you don't want one): There are a wide variety of possible themes involved (pin, possible double attacks and smothered mate, possible deflection), but the whole combination hinges on White's weak back rank. My son is over tonight so I can't say any more for now.

Apr-12-06
Premium Chessgames Member
  kevin86: My idea was h7+ followed by ♕h5-White threatens mate and the knight. I think this win quickly,too-though not as flashy as ♖h7
Apr-12-06  yalie: <jmelton> bxe4 bxf7 bxg2+ kxg2 (kg1 qe3+ kxg2) qf3+ kg1 nh3 looks devastating .. took me a while to figure it out .. you misled us with that back rank comment:) .. I was looking to save the rook ..
Apr-12-06  yalie: just realized that the17th pawn also gave the same combination ... well other than take the rook what else can white do? maybe offer a check with the queen ..
Apr-13-06  RandomVisitor: <jmelton>38... Bxe4 39. Ng3 Bxg2+ 40. Kxg2 Qf3+ 41. Kg1 Nxe6
Apr-13-06  Richerby: <belka: Black does NOT want to take the pawn. It's so grossly losing that I didn't really even consider Nxh7, actually.> But 23... ♔h8 24.♘f7+ 23... ♔g7 24.h8♕# lose so quickly that White is forced to consider responses to 23... ♘xh7 to verify that the 23.h7+ idea actually works. 23... ♘xh7 is Black's only chance.
Apr-13-06  euripides: <Aristarchus> After 24...Bxe5 I think White's best may be 25 dxe5 Kxh7 26 Rxd8 Rxd8 27 Qh5+ Kg7 28 Qg5+ and 29 Qxd8.
Apr-13-06  jmelton: Solutions to the puzzle I posted (note -- I presented it from Black's point of view, so ignore the algebraic notation guides on the sides of the diagram since they're reversed):

Black to play and win (from S Mariotti vs Taimanov, 1977):


click for larger view

1...Bxe4!

if 2. Bxf7 Bxg2+ 3. Kg1 (3. Kxg2 Qf3+ 4. Kg1 Nh3#) Qe3+ 4. Kxg2 Qf3+ 5. Kg1 Nh3#

if 2. Bd5 Qc2 3. Bxe4 (3. Rg1 Qxg2+! 4. Rxg2 Rf1#) Nxe4 4. Qd8+ Kh7 5. Re1 Qe2! 6. Qd1 Rf1+!! 7. Rxf1 Nf2+ 8. Kg1 Nxd1 (or 8. Rxf2 Qxd1+)

This combo has it all -- back rank threats, pins, forks, deflections...too bad Taimanov missed it or he'd have had himself a brilliancy prize. Nice to see that today's puzzle features Taimanov. His wipeout by Fischer in the 1971 candidate's match was deceptive -- the guy could play!

Apr-13-06  belka: <Richerby: But 23... h8 24.f7+ 23... g7 24.h8# lose so quickly that White is forced to consider responses to 23... xh7 to verify that the 23.h7+ idea actually works. 23... xh7 is Black's only chance.>

My point is that 23... xh7 is what White wants. The idea is to force the h file open. Black cannot get away with hiding behind the pawn, and so the idea "works" in this sense.

Is opening the h file a good plan in this position? That seems clear to me, it definitely is. It activates a rook, converting an advanced pawn into space and an open line. The pawn isn't going to queen, so this is a good use of the asset.

It's a different perspective, one that I thought was interesting.

Apr-13-06  RandomVisitor: <jmelton>best play for white after 1...Bxe4 is actually 2.Ng3 (see my line above)
Apr-27-06
Premium Chessgames Member
  patzer2: White's 23. h7+! initiates a likely mate-in-five to finish off Black's weakened castled position after 23...Nxh7 24. Rxh7 Kxh7 25. Qh5+ Kg8 26. Qf7+ Kh8 27. Ng6#.
Apr-27-06
Premium Chessgames Member
  patzer2: Of course, as <RamdomVisitor> noted earlier, White's winning combination actually began with 17. Bxh6+!, which gains a decisive pawn since 17...Kxh6?? 18. Nxf7+ drops the Queen to a Knight fork.
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