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Jakob Aabling-Thomsen vs Jeroen van der Meer
Politiken Cup 27th (2005), Copenhagen, rd 1, Jul-16
Scandinavian Defense: Modern Variation (B01)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
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Jun-16-15
Premium Chessgames Member
  offramp: Let's keep Politiken out of chess.
Jun-16-15  diagonalley: well, after 20.PxN white comes out a piece up... a straightforward win at club level (though perhaps not at a tuesday level?)
Jun-16-15  lost in space: Too easy for a Thursday
Jun-16-15
Premium Chessgames Member
  Gregor Samsa Mendel: Um, <lost in space>, you appear to be lost in time as well.
Jun-16-15  dfcx: material even, black is attacking white's queen.
20.cxd5 wins a piece.

20...exd4 21.d6+ wins the queen back.

Yesterday's puzzle was more interesting.

Jun-16-15  Cheapo by the Dozen: cd wins a piece and also opens attacking lines, the point being the discovered check that recovers a queen of Black takes White's first.

Pretty easy even as Tuesdays go.

Jun-16-15
Premium Chessgames Member
  gawain: An odd one for a Tuesday. White goes a piece up by 20 cxd5. If Black captures the queen 20... exd4 then White continues 21 d6+ and with this discovered check wins back the queen.

This is clever but seems less overwhelmingly decisive than an ordinary Tuesday solution.

Jun-16-15  Cheapo by the Dozen: This game doesn't do anything to help me understand why the Center Counter has been revived in recent decades.
Jun-16-15  morfishine: First <20.cxd5> followed by 20...exd4 21.d6+ & White is a piece up

*****

Jun-16-15
Premium Chessgames Member
  agb2002: White has the bishop pair for a bishop and a knight.

Black threatens 20... exd4.

The bishop on b3 x-rays the black king. This suggests 20.cxd5 exd4 (else drops a knight) 21.d6+ Be6 22.Bxe6+ Kxe6 23.dxc7 Rac8 24.Bf4 wins a piece at least.

Jun-16-15  Caissas Clown: Easy.Pretend it's Monday and it becomes even easier.
Jun-16-15  Robespierre: Like many other commenters I saw White's first 2 moves nearly immediately. What's so strange to me is that it seemed like the answer came to me without conscious cognition -- the answer simply appeared without strenuous thoughts or ponderings! Do other participants have similar observations?
Jun-16-15  patzer2: Trade a Knight for a Queen with 20. cxd5 exd4 and then win a Queen with discovered check with 21. d6+ to solve this Tuesday puzzle.

Net gain after trading Queens is the win of a piece and the game.

Black missed several early opportunities:

Instead of <9...Nd5>, 9...Qxd4 = wins a free pawn with advantage.

Instead of <10...Be7 11. Qg3 >, Black gains a tempo for development with 10...f5 11. Nc3 Bd6 =.

Instead of <14...Bxc5? 15. dxc5 >, 14...g5 15. h4 Bf6 16. Qg3 Bxd4 = establishes active, dynamic equality.

Jun-16-15  jith1207: I think the devil is in determining if the game has a mating end or about getting a piece or two up. Even though the puzzle itself is easy compared to other Tuesdays, it gives us more thoughts on different lines we can try after winning a piece up. May be that's the idea behind giving this on Tuesday.
Jun-16-15  Checker2: Robespierre, I had a very similar confidence in the solution without much calculation. It seemed self evident with the power of the open diagonals around the black king.
Jun-16-15  jith1207: Robespierre, I think this kind of moves always come up naturally to chess players' thought process but then the analysis starts if there's really am advantage or if that's a trap. Only when we ensure the moves really bring an advantage, we move forward. I believe this is one of the moves, that appears OTB standing out screaming to be played.
Jun-16-15
Premium Chessgames Member
  Once: There is an interesting position one move before the puzzle. Here is the position after 19. c4


click for larger view

Black is in trouble. His knight is attacked and if it moves his Bd7 comes under fire. 19...Nf6 doesn't work because of 20. Bf4 Qc8 21. Be5 when both the Nf6 and Bd7 are vulnerable.

So Black tries for a counter-attack. With 19...e5 he assumes that the White queen will have to move, giving him time for Nf6 and Rd8.

We now know that 19...e5 doesn't work because of 20. cxd5 and 21. d6+. But at the time that Black played it, the diagonal from the White bishop on b3 to the Black king on f7 seemed to be blocked with three pieces in the way.

Black probably switched off his sense of danger along this diagonal. He assumed that the white queen had to move.

Of course when we see it as a puzzle which tells us that there is a tactic to be found. And that puts us in the right frame of mind to ignore the attack to our queen. But neither Black or White would get clues like this.

Astonishing how quickly that b3-f7 diagonal can open up.

Jun-16-15  stacase: I look at the position to see who's under attack, can I say check and start considering various moves. 20. cd5 was probably my 2nd look-see and "Oh yeah! That's it." I love to say discovered check (-:
Jun-16-15  Nick46: <Robespierre: Like many other commenters I saw White's first 2 moves nearly immediately. What's so strange to me is that it seemed like the answer came to me without conscious cognition -- the answer simply appeared without strenuous thoughts or ponderings! Do other participants have similar observations?> Oui.
Jun-16-15  sfm: <Robespierre: Like many other commenters I saw White's first 2 moves nearly immediately. What's so strange to me is that it seemed like the answer came to me without conscious cognition -- the answer simply appeared without strenuous thoughts or ponderings! Do other participants have similar observations?>

Actually, the need to do calculations is evidence of our limited chess ability. The strongest move should just pop up in our mind.

At time it does. Congratulations, may it happen ever more often to you.

"What others could not see in a month's study, he saw at a glance." – Reuben Fine (on Capablanca)

Jun-16-15
Premium Chessgames Member
  offramp: <Robespierre: ...without strenuous thoughts or ponderings!>

Are you pondering what I'm pondering?

Jun-16-15
Premium Chessgames Member
  whiteshark: <20.cxd5 exd4 21.d6+> wins a piece, at least, and that's it.
Jun-16-15  zb2cr: 20. cxd5, exd4; 21. d6+, Be6; 22. Bxe6, Kxe6; 23. dxc7, Rac8; 24. Bf4. White is a piece up and in good shape.
Jun-16-15  CHESSTTCAMPS: White has a strong bishop pair versus passive B+N. Assuming black's last move was e5, the alternative Nf6 would have lost to 20.Bf4 Q-moves 21.Be5 winning a piece. As it is, white wins a piece in a different way:

20.cxd5 exd4 21.d6+ Be6 (Kf6 22.dxc7 is even worse) 22.dxc7 with white's c-pawn a threat and black's d-pawn a goner.

Jun-16-15  CHESSTTCAMPS: The name of the losing player in this game will remind baseball geeks of this guy: https://en.wikipedia.org/?title=Joh...
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