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Matthias Bluebaum vs Vladimir Fedoseev
World Youth Championship (2012), Maribor SLO, rd 5, Nov-12
Dutch Defense: Stonewall. Modern Variation (A90)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Jun-15-14  abstraction: First! Found d5 quickly, threatening Bd4.
Jun-15-14  iking: such a beauty ...
Jun-15-14
Premium Chessgames Member
  Jimfromprovidence: 42 d5 not only threatens 43 Bd4+, but it allows the queen access to the f file to prevent mate, demonstrated with the text 42...Rxf7+ 43 exf7 Qf5+. Now white has 44 Qf4, below.


click for larger view

Black now has to exchange queens to prevent 45 Rg8#

Here is the position at resignation after 47 Kd1.

Black has to either give up his queen or play his king to g7 to prevent Bd4+.


click for larger view

Assuming 47...Qxe1+ 48 Kxd1 Kg7, then 49 dxc6, below, (or 49 d6) wins nicely.


click for larger view

Jun-15-14  devere: 42.d5! Rxf7+ 43.exf7 Qf5+ 44.Qf4!(the only move)Qxf4+ 45.Rxf4 g2+ 46.Kxe2 g1=Q+ 47.Kd1 and White wins.


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Jun-15-14  dzechiel: White to move. Material even. "Insane."

At first glance, it looked to me like black's knight on e2 was en prise. But some searching around the board revealed that black was threatening to capture the bishop on f7, as once white recaptured, the rook on g4 would then be hanging.

So, I expect we will need to look deeper, and come up with a plan.

One of the things I noticed early on about this position, is black's weakness on the a1-h8 diagonal. Because of this, I think the first move is most likely...

42 d5

This move has two things going for it. First, it allows the queen to protect the rook on g4. The threat of 43 Rxe2 is now real, and black must counter it. But even more important, black cannot capture with 42...cxd5 because white could then play 43 Qd4+ Nxd4 44 Bxd4+ Bf6 45 Bxf6#. How can black put up resistence?

Well, I don't think the black knight is going anywhere, so I think black will have to come up with a threat of his own. Right now all I see is...

42...h5

This move stops the mating combination starting with 43 Qd4+ mentioned above, and it threatens the rook on g4, so white doesn't have time to go after the knight.

Gosh, the more I look at this, the more I don't like 42...h5, mostly because of 43 Bd4+ Kh7. This isn't good for black, there must be something better for black's 42nd, but I'm not seeing it tonight.

OK, turning over all the cards. Time to check.

=====

Wow. In retrospect, the capture on f7 is obvious, as it is forcing and limits white's replies. I should have looked at it harder.

Black's resources are only out-shined by white's resources. A very interesting ending.

Jun-15-14  M.Hassan: "Insane"
White to move 42.?
Sides are equal but White has a Bishop for a Knight.
At first it appeared to me that taking the Knight on e2 could be beneficial to White but it showed not to be the case:

42.Rxe2 Rxf7+
43.exf7 Qxg4
44.Ke1 g2
45.Bg1 Rh1
46.f8=Q? Bxf8
White is a pawn down and draw may be the case
I then thought to provide room for DS Bishop along the long diagonal:

42.d5!
This move not only opens possibility of attack to the King but protects the Rook on g4 as well

42...........Rxf7+
43.exf7 Qf5+
44.Qf4 Qxf4
45.Rxf4 g2+
46.Kxe2 g1=Q+ (check is by Rook)
47.Kd1
Just as the time that Black Queened and appeared that there is prospects of winning, things changed

47...........Qg6
48.Bd4+ Bf6
49.f8=Q+ Qg8
50.Bxf6#

Jun-15-14
Premium Chessgames Member
  hoodrobin: Insane... no, just too difficult. Maybe in a couple of hours.
Jun-15-14  morfishine: Black looks all but dead. White need only open the a1-h8 diagonal and its all over; Black has a tiny imperceptible threat: Rxf7 followed by Qxg4; not only is this easily parried, this looks way too dangerous to contemplate

42.d5 Rxf7+ 43.exf7 Qf5+

This is as far as I could visualize accurately not dreaming White plays 44.Qf4 or even that Black would respond 44...Qxf4

*****

Jun-15-14  knight knight: I thought 42. d5 was likely the move, since it opens up the d4-h8 diagonal, but didn't analyse very deeply.

If 42...h5 in reply, then 43. Bd4+: a) 43... Kh7 44. Qd3+ Kh6 45. Qg6#, b) 43... Bf6 44. Bxf6+ Kh7 45. Qe4+ Kh6 46. Qg6#, c) 43... Nxd4 44. Qxd4+ Kh7 45. Qg7#, d) 43... Nxd4 44. Qxd4+ Bf6 45. Qxf6+ Kh7 46. Qg7#.

Jun-15-14
Premium Chessgames Member
  offramp: I have never played the Dutch Defence and I don't think I ever will... But I think I've seen more brilliant games with the Dutch Defence than any other opening.
Jun-15-14  crystalpauper: Unfortunately, many of them are brilliancies with the white pieces
Jun-15-14
Premium Chessgames Member
  agb2002: White has the bishop pair for a bishop and a knight.

Black threatens 42... Rxf7+ 43.exf7 Qxg4 or 43... Qf5+.

The defenseless rook on g4 and the position of the black king suggest 42.d5, threatening mate in three:

A) 42... Rxf7+ 43.exf7 Qf5+ 44.Qf4

A.1) 44... Nxf4 45.Rg8#.

A.2) 44... Qxf4+ 45.Bxf4 g2+ (45... Nxf4 46.Rg8#; 45... h5 46.Rg8+ Kh7 47.Rxe2 + - [R]) 46.Rxg2 + - [R+P vs N] with many threats (47.Rg8#, 47.Qxf5, 47.Rexe2, etc.).

B) 42... g2+ 43.Rxg2 Rxf7+ 44.exf7 Qh3 45.Bd4+ and mate in two.

C) 42... Bf6 43.Rxe2 seems to win a piece for nothing.

Jun-15-14
Premium Chessgames Member
  agb2002: 45.Bxf4 in my line A.2 is a blunder which allows 45... Rf2#. I can't explain it.
Jun-16-14  dfcx: Black is trying for 42...Rxf7+ next, while the d4 pawn is in the way of the bishop/queen for the a1-h8 diagonal. So the first move is easy to spot.

42. d5!
A) 42...Bf6 43. Rxf2
B) 42...Rxf7+ 43. exf7 Qf5+ 44. Qf4! Qxf4+ (...Nxf4? 45. Rg8#) 45. Rxf4 Nxf4 46. Bxf4 Rf2+ 47. Kg1 Rxf4 48. Rxe7 Kg7 49. dxc6 wins Other variation also seems to favor white

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