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Marc Dutreeuw vs Olli Salmensuu
ECC (2001), Panormo GRE, rd 4, Sep-26
Nimzowitsch Defense: Lean Variation. Colorado Counter Accepted (B00)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
May-07-08  shinto: I agree with you Zooter. Thanks for your responds..
May-07-08  234: Tuesday puzzle <39. ...?> May-06-08 Feigin vs Flohr, 1937
May-07-08  Samagonka: Yep! My only instinctive thought, though I don't even know the continuation.
May-07-08  zb2cr: <Shinto>,

These puzzles do not have to be shown to lead to mate, merely to a winning advantage. See the link:

Daily Puzzle F.A.Q.

for a description of the goal of the puzzles.

May-07-08
Premium Chessgames Member
  PhilFeeley: Here's a very funny Nimzowitsch opening game with a queen sac on move 5!

K Spraggett vs F South, 1976

May-07-08  Funicular: Rxe4, fxe4, Rf8+, Ke1 and i was like...ok, did i just miss something!?

Then of course, Ba5+.

Its like yesterdays puzzle, i solved it AFTER i noticed that the queen has the c1 square available.

When i cant find the solution, i tell myself "look around the WHOLE board" and it always works :P

May-07-08
Premium Chessgames Member
  kevin86: I hit this one 100% (about 89% better than what LeBron James made last night ,2/18). The sac at e4 forces white to open a door-a rook will come in and end it all...

31 dxe4 ♖xd1+ regains the rook and leaves black a piece ahead.

31 fxe4...see the text to the game.

May-07-08
Premium Chessgames Member
  johnlspouge: <<Funicular> wrote: [snip] When i cant find the solution, i tell myself "look around the WHOLE board" and it always works :P>

An examination of the entire board is critical to using <all> your resources. Like familiarizing yourself with the basic elements of any difficult problem before sitting down to solve it, the examination should be done as forethought, rather than afterthought.

A good example where my lack of perspicacity prevented a puzzle solution is C Bielicki vs Smyslov, 1964, where I did not consider an essential queening threat in an out-of-the-way corner of a board. Smyslov did not miss the solution, however, so I suspect he looks (thoroughly) before he leaps ;>)

May-07-08  Magic Castle: <Shinto> <Zooter> The way I look at it black wins a whole piece whichever pawn captures. 31. de4 Rd1+ recovers the Rook and wins the captured Knight. 31. fe4 Rf8+ (If Kg1 e2+ (discovered check by Bishop followed by ed1=Q. Of course 32. Rf2 is suicidal. Looks like the best continuations for white are: 31. fe4 Rf8+ 32. Ke2 Rf2+ 33. Ke2 Rc2; or 31.fe4 Rf8+ Ke1 32. Ba5+ (forcing white King to 33. e2 Rf2+ 34. Ke2 Rc2, again snaring the rook at c2. In short white did not just lose the exchange he lost a whole piece and yielded the 7th rank to black rook. What else but resign.
May-07-08
Premium Chessgames Member
  patzer2: For today's Wednesday puzzle solution, the sham sacrifice 30...Rxe4! utilizes the pin and a key deflection to open up a file for the other Black Rook to deflect the White King for a winning skewer attack after 31 fxe4 Rf8+ 32 Ke2 Rf2+ 33 Ke1 Rxc2 .

As pointed out by <lost in space>, <dzechiel> and <johnlspouge>, with a piece up, Black wins easily in this variation and has no trouble scoring the full point against other tries.

May-07-08
Premium Chessgames Member
  YouRang: After blowing yesterday's puzzle, I wasn't going to let this one get away.

Clearly, black's attack was going to come from the rooks, and the rooks need an open file. This calls for the exchange sac 30...Rxe4 forcing 31.fxe4 (since the d-pawn is pinned). This opens the f-file for 31...Rf8+.

White's only choice is 32.Ke1 (since 32.Ke2 walks 32...Rf2+ skewering the c2 rook, and 32.Kg1?? steps into discovered check, 32...e2+ 33.Kh1 exd1=Q# and a good laugh).

It took me a moment to see what to do next, but 32...Ba5+! pushes white into the skewer anyway: 33.Ke2 Rf2+ 34.Kxe3 Rxc2

May-07-08  mworld: I got the solution thankfully after yesterdays mess up.

What an interesting opening this was. Anyone know where you can readup on this one online?

May-07-08  dakgootje: Gosh, couldn't come up with Ba5... certainly the lack of puzzles has decreased my solving-skill ;-)
May-07-08  MiCrooks: I don't get the mate talk. I no one is going to walk into the discovered check even if it didn't end in mate you would lose your Rook AND allow a pawn to queen.

And the talk of being posted for an "attack" and sacking the rook for the attack is bunk as well. If you didn't have a forcing variation leading to the gain of material it wouldn't be worth it and since you do it isn't much of a sac, certainly not one for an attack. Those kind of sacs do exist and they make for great games, but not much of a puzzle since by definition the position left is unclear.

Finding a response to Ke1 is critical, as the whole variation is based on the King going to e2 where Rf2 nets the White Rook.

May-07-08
Premium Chessgames Member
  johnlspouge: As <dzechiel> points out, <black only has one really forcing move> [30...Rxe4]. The move 30..Rxe4 is worthless on its own, however, as <MiCrooks> points out: <Finding a response to Ke1 is critical, as the whole variation is based on the King going to e2 where Rf2 nets the White Rook.>

Here again, we see the difference between a puzzle and a real game. The insight to focus on 30...Rxe4 might be useful, but only in conjunction with sufficient calculation to visualize 32...Ba5+.

May-07-08  number 23 NBer: 30...♖xe4 31 fxe4 ♖f1+ followed by ♖f2+ or e2+, as the occasion requires, looks won.
May-07-08  Archerforthelord: there's no way this was easier than yesterday's Nf2+. I blinked and saw that one.
May-07-08
Premium Chessgames Member
  patzer2: <You Ranq> <It took me a moment to see what to do next, but 32...Ba5+! pushes white into the skewer anyway: 33.Ke2 Rf2+ 34.Kxe3 Rxc2 > Good point! I visualized it in solving the puzzle, but neglected to mention the winning 32...Ba5+! reply in my earlier post to 30...Rxe4! 31 fxe4 Rf8+ 32. Ke1.
May-07-08  wals: Static Evaluation: Material is even. Black has a dark square bishop for a knight. Queens are off the board.

Dynamic evaluation: Black has a passed pawn, protected by Bb6. White has it covered, literallly by
the Ne4, aided by d3 and f3 pawns, from the assistance of Re8. If Re8 took e4,which pawn would take e4. Not d3 as this would result Rxd1+. Taken by f3 leaves the King exposed to Rd8-f8+. So the King moves, say, to e2, and what advantage has black got, Rf8-f2+. If the King moves to g1, then e3-e2+ and the rook goes.

Abstract Assessment: Re9xe4 f3xe4 Rd9-f9+ Kg2 Rf2+ candidate move Re8xe4

30....Re9xe4 31.f3xe4 ...Rd8-f8+ 32.Ke2 ...Rf2+

33.Ke1 ...Rxc2
let's see how I fare

PM=

Yippeee, a winner

Marc Dutreeuw - Olli Salmensuu, ECC Panormo GRE 2001

Analysis by Fritz 11: depth 24/44 time 44min19

1. (-4.07): 30...Rxe4 31.fxe4 Rf8+ 32.Ke1 Ba5+ 33.Ke2 Rf2+ 34.Kxe3 Rxc2 35.Kf3 Rxa2 36.d4 Bd2 37.e5 Rb2 38.h3 c6 39.Ke4 Bb4 40.Rf1 Rxg2

2. (-0.32): 30...Re5 31.g4 Red5 32.Ke2 Bd4 33.Rc4 h5 34.h4 Rh8 35.Rh1 c5 36.g5 Ka7 37.Rhc1 b5 38.Rxd4 Rxd4 39.Rxc5

(, 08.05.2008)

May-07-08
Premium Chessgames Member
  minasina: <mworld:...What an interesting opening this was. Anyone know where you can readup on this one online? >

There is something, though not much: http://en.wikipedia.org/wiki/Nimzow...

May-07-08  robinpark98: 30... Rxe4! 31. fxe4

(dxe4? Rxd1)

Rf8+ 32. Ke1

(32. Kg1?? e2+ 33. Kh1 exd1=Q#)

(32. Ke2 Rf2+ Ke1 Rxc2)

32... Ba5+ 33. Ke2 Rf2#

May-07-08  Halldor: Nice puzzle, the lines unfolded easily.
May-07-08  PinnedPiece: For my talent level, today's puzzle and yesterday's puzzle could swap places. This was a lot easier!

(Even analyzing the forcing moves after Rxe4)

But I should quickly add, If I was just playing the moves to the game, and anticipating the best moves of either player, as though OTB analysis, I'm sure I WOULD HAVE MISSED THE SAC. But as it was a puzzle, I went into a different mental gear...

Would be nice to have that gear always engaged!

May-07-08
Premium Chessgames Member
  InspiredByMorphy: 30.Re2 would have offered white better chances. Black would still have the passed pawn and positional advantage however.
May-07-08  Halfpricemidge: I like this defence-wonder why it's not more popular.
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