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Hans Seyboth vs Luetze
St. Petersburg National t (1902), St. Petersburg RUE
King Pawn Game: Alapin Opening (C20)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 3 ·  Later Kibitzing>
Apr-07-15  morfishine: D-four, shuts the door
Apr-07-15
Premium Chessgames Member
  Once: Now that's a tricky little blighter! Took me quite a bit longer than the normal Choosday.

The first bit doesn't take too long. We have a juicy position where the Black queen has to do two jobs. She has to stop Nc7+ and Nxe4. She can only really do those two jobs from e5. So we want to look for deflection moves. If we can kick the Black queen from e5 we ought to be able to win material.

The move that kicks the Black queen is 8. d4. Then we need to analyse what happens if the queen runs away and what happens if she captures the pawn. 8...Qf5 is the game line and pretty straightforward, so let's look at the pawn grab.

8...Qxd4.


click for larger view

Now we need to spot that 9. Nc7+ doesn't work. After 9...Kd8 we can't play 10. Nxa8 on account of 10...Nxc3. And 10. Nxe4 Kxc7 is level.

After 8...Qxd4 I was tempted by 9. Be3 which Fritzie agrees is winning, but not as strong as 9. Nxe4. I think 9. Be3 is the principled developing move (and a darn sight easier to play than 9. Nxe4).

Black has several replies to 9. Nxe4, but the trickiest is 9...cxd5. Now we need to spot a mini king hunt. The only way to a clear win from here is 10. Nd6+ Kd8 11. Qe8+ Kc7 12. Nb5+ Kb6 (12...Kc6 13. Qxc8) 13. Qd8+ Kc5 14. Qc7+ and finally White gets a chance to win the Black queen without falling prey to a Bb4+ tactic (losing his own queen).

So one of today's lines is ... deep breath ...

8. d4 Qxd4 9. Nxe4 cxd5 10. Nd6+ Kd8 11. Qe8+ Kc7 12. Nb5+ Kb6 13. Qd8+ Kc5 14. Qc7+ Nc6 (or Kb4) 15. Nxd4

An eight move combination full of "only" moves - and this is a Tuesday?

Apr-07-15  wooden nickel: This opening is better than I thought, if 8... Qxd4, then 9.Nxe4! Another interesting line:
9.Be3 Nxc3?? (attacking the queen), but 10.Bg5+! and mate in the next move!


click for larger view

Apr-07-15  jith1207: Tu-NOT-easy-day!
Apr-07-15  TheaN: Tuesday 7 April 2015 <8.?>

In this Petrov-esque occupation of the e-file black committed himself to early development of the queen. White's knight on d5 and black's knight on e4 are en prise; a simple trade will not be in white's advantage.

Instead, white should abuse the early commitment by black:

<8.d4!> worth of note that 8.Nxe4? cxd5! does not work, as both 9.Nd6+ Bxd6 and 9.Nf6+ gxf6 protect the queen from the discovered attack. Key after d4 is that the d5 knight is immune, and the queen has to leave the defense of the e-file.

A) <8....Qd6> fails quickly: <9.Nxe4 > now if Qxd5 Nf6++ and white wins at least a piece.

B) <8....Qf5> is similar to A: <9.Nxe4 cxd5 10.Nd6++ > and of course if Qxd5 Nf6++ .

C) <8....Qxd4> if nothing else works, accept a sacrifice <9.Nxe4 cxd5> tries to hold on to the piece; Qxd5 Nf6++ still. <10.Nd6++ Kd8 11.Qe8+ Kc7 12.Nb5+> though a royal fork, white is not done yet. <12....Kb6 (Kc6 13.Qxc8+ )> 13.Nxd4?? would be a major blunder due to 13....Bb4+ with 14....Rxe8. In case of 14.c3 Rxe8+ is with check, so black will level material and be two pawns up. <13.Qd8+> and black cannot keep the queen any longer: <13....Kc5 (Ka6 14.Nxd4+ b5 15.Qxc8+ ) 14.Nxd4 > and the king blocks Bb4+. White wins at least the queen for a knight, but it will be more shortly.

Apr-07-15  TheaN: <Once> great thorough analysis of the variations covered in this miniature, however after 13....Kc5, 14.Qc7+ is not necessary. The black king blocks against Bb4+, so white can take on d4 directly.

Problems I had with 14.Qc7+ was that it develops Nb8 with tempo, and protects c8 and 14.Qxc8+ seemed even more risky after 14....Nc6?! 15.Qxa8 Qe5+ in a probably futile attempt of black to get a perpetual somewhere.

So I opted to just play 14.Nxd4 directly. If 14....Kxd4 15.c3+ with Qxc8 etc and black has absolutely nothing for the queen.

Ironically, Stockfish analyses 14.Qc7+ as #5 and 14.Nxd4 #6, so I guess it does have merit playing Qc7+ first.

Apr-07-15  zb2cr: 8. d4! does it.
Apr-07-15
Premium Chessgames Member
  agb2002: White is one pawn down.

Black threatens 8... cxd5.

The black queen protects the knight on e4, blocks checks and prevents Nc7+. Therefore, 8.d4:

A) 8... Qxd4 9.Nxe4 (threatens 10.Nc7+ and 10.Nd(f)6+ Kd8 11.Qe8#; 9.Nc7+ Kd8 10.Nxa8 Nxc3 looks much weaker)

A.1) 9... cxd5 10.Nd6+ Kd8 11.Qe8+ Kc7 12.Nb5+ followed by 13.Nxd4, winning.

A.2) 9... Qxd5 10.Nf6+ followed by 11.Nxd5, winning.

A.3) 9... Bb4+ 10.c3 wins a lot of material.

A.4) 9... Kd8 10.Ndc3 + - [N vs P].

B) 8... Qe6 9.Nc7+ and 10.Nxe6, etc.

Apr-07-15  CHESSTTCAMPS: White is down a pawn in the opening with wonderful compensation. When you're playing black, exposing your position to open file pin tactics on the e-file when you're a tempo behind is a dangerous game. Black seems to be covering the major check and capture threats, e.g. 8.Nc7+? Qxc7 9.N|Qxe4 Be7 is safe, while 8.Qxe4? Qxe4 9.Nxe4 cxd5 hands black a safe endgame. But the black queen is overburdened protecting c7 and e4, so white should play

8.d4!

and black has no good place to put the queen:

A) 8... Nxc3? 9.Qxe5+ Kd8 10.Qc7+ and mate next

B) 8...Qf5 9.Nxe4! cxd5 (Qxd5 10.Nf6+ does the trick) 10.Nd6+ wins the queen.

C) 8... Qe6 9.Nc7+ wins

D) 8... Qd6 9.Nxe4 Qe6 (Qxd5 10.Nf6+) 10.Nc7+ wins queen.

E) 8... Qxd4 10.Be3!! Qe5 (Nxc3 11.Bg5+!! Nxe2 12.Nc7#) 11.Bf4 Qd4 (Qe6 12.Nc7+) 12.Nc7+ Kd8 13.Qxe4 Qxe4+ 14.Nxe4 to be followed by 15.Nxa8 with a big material advantage.

Time for review...

Apr-07-15
Premium Chessgames Member
  agb2002: I should have calculated a bit deeper in my line A.1 due to 12... Bb4+, as already mentioned by Once, TheaN and others.
Apr-07-15  CHESSTTCAMPS: I like the position after 8.d4 Qxd4 9.Be3 Nxc3:


click for larger view

White uncorks 10.Bg5+ Nxe2 11.Nc7#

Apr-07-15
Premium Chessgames Member
  Penguincw: Damn it! I thought 8.Nxe4 cxd5 9.Nd6?? was the solution (I missed 9...Bxd6, protecting the queen).
Apr-07-15
Premium Chessgames Member
  Once: <TheaN> Good point. I suppose I wanted to get my queen off the back rank so that I could be sure I was safe when I grabbed the Black queen. But you are quite right - we can play Nxd4 one move sooner than my line.

This variation does feel a bit more complicated than your normal Tuesday.

Apr-07-15  A.T PhoneHome: <8.d4> is a pretty deflection! Now <8...Qf5 9.Nxe4>, winning a piece. This was a nice puzzle which is something I probably wouldn't say had I failed here. :P

Enjoy your Tuesday <people>!

Apr-07-15  CHESSTTCAMPS: I should have reviewed the whole thread and noticed that <wooden nickel> posted (almost) the same position.
Apr-07-15  BOSTER: < TheaN: 12...Kb6 (Kc6 13.Qxc8+ + -)>. This is not , because after 13.Qxc8+ Kb6 14.Qc7+ Ka6 15.Nxd4+ b5 16. Bxb5#.
Apr-07-15
Premium Chessgames Member
  kevin86: The THREAT of double check wins this one!
Apr-07-15
Premium Chessgames Member
  Karne: <morfishine: D-four, shuts the door>

Have I not taught you to tell twitter and not us?

Apr-07-15  BOSTER: So, if you can count what said <Once > after 8.d4, black should answer with bold Qxd5 9.Nxd5 cxd5 , and play the game like nothihg happened.
Apr-07-15
Premium Chessgames Member
  thegoodanarchist: Hardest Tuesday puzzle ever, IMO.
Apr-07-15
Premium Chessgames Member
  whiteshark: QP4, ends the war.
Apr-07-15  MagisterMusicae: Seibot vs Luetze? Who vs Who?
Apr-07-15  scormus: This is Tuesday, isn't it? Only move that seemed it should work is 8 d4, but I couldn't prove to myself that it does, not by just looking at the position anyway. Hats off to those who worked it through to the win. After 8 ... Qxd4, 9 Be3! looks cool
Apr-07-15  mistreaver: Tuesday.White to play. Easy. 8.?
8 d4 Qxd4
9 Nxe4 exd5 (Qxd5 10 Nf6 dis ch)
10 Nd6 ch Kd8
11 Qe8+ Kc7
12 Nxf7 and i think white has to win.
Immediately
8 Nxe4 dxe4
9 Nd6 Bxd6
doesn't work i think.
Time to check.
--------------
Whoops what a blunder, in my line 12... Bb4+ wins the queen and the game for black. How terrible. But i haven't anticipated that long forced combination on Tuesday.
Apr-07-15
Premium Chessgames Member
  Bubo bubo: No points for me today: I considered 8.d4, but did not see the main line. But does this puzzle really deserve the rating <easy> ?
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