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Heinrich Walkerling vs Hanssen
corr (1928) (correspondence)
Sicilian Defense: Pin. Koch Variation (B40)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
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Dec-20-16
Premium Chessgames Member
  Phony Benoni: Classic situation. Queen pins pawn which attacks bishop. You simply have to check if she gets trapped after consuming the rook on a1. Yup. <9.abx4 Qxa1 10.Nb3<.

Just have to be Tuesday Careful; if Black tries 10...h5, don't fall for 11.Qd1 Nxc3!

Dec-20-16  diagonalley: "cute", yes... even astonishing... i never came across this pattern before
Dec-20-16  bengalcat47: Not only is "pawn-grabbing" bad, "rook-grabbing" is a fatal mistake!
Dec-20-16
Premium Chessgames Member
  agb2002: The material is identical.

Black threatens Bxc3+.

White can win a piece with 9.axb4 (9... Qxa1 19.Nb3 traps the queen).

Dec-20-16  YouRang: Tuesday 9.?


click for larger view

Failing to see any good opportunities for a king assault, I eventually noticed that the black queen's mobility is limited, so I got to thinking about a queen trap.

I looked at <9.hxb5 Qxa1> a couple times before noticing that that <10.Nb3!> hits all the right squares: Attacking queen on a1, guarding the bishop on c1 and sealing off the escape square at a5.


click for larger view

Dec-20-16  AlicesKnight: First glimpse says White has no attack after giving up the exchange. But second glimpse says after 9.axb4 Qxa1, 10.Nb3 wins the Q. Good enough.
Dec-20-16
Premium Chessgames Member
  scormus: <YouRang> You took the words right out of my mouse ;)
Dec-20-16
Premium Chessgames Member
  thegoodanarchist: Hanssen got bopped
Dec-20-16
Premium Chessgames Member
  Gilmoy: Walkerling lets 'em walk her in!
Dec-20-16  ChessHigherCat: Queen gets rooked
Dec-20-16
Premium Chessgames Member
  Once: File this one under "looking a little further". Black plays 8...Qa5 to add pressure to the pinned Nc3, figuring that white can't play 9. axb5 on account of 9...Qxa1.

White spots that after 10. Nb3, the black queen is trapped. Then we need to count pieces. After 10...Qxc1+ 11.Nxc1, the butcher's bill is rook for queen.

Trapping the queen isn't necessarily a problem as long we get some compensation. Black would have been okay if he had somehow snaffled a minor piece in the flurry of exchanges.

But rook for queen and poorly developed, that's time for black to offer a handshake and head off to the pub.

Dec-20-16  ChessHigherCat: Or more precisely, b-knighted queen gets rooked
Dec-20-16  morfishine: Seen this one, guess Black didn't
Dec-20-16
Premium Chessgames Member
  Oxspawn: Well.... I saw that after axb4, black cannot not take the rook without losing the queen. So I assumed black would play something like Qc7 and I then struggled to find a conclusive follow up. If losing a bishop was a resignation matter I would be resigning a lot of games a lot earlier than I do! Felt a bit deflated when I saw the game continuation. Noone ever falls for my traps... Bah Humbug.
Dec-20-16  Abdel Irada: ∞

<I looked at <9.hxb5 Qxa1> a couple times before noticing that that <10.Nb3!> hits all the right squares: Attacking queen on a1, guarding the bishop on c1 and sealing off the escape square at a5.>

I have to admit that 9. hxb5 is a move that never occurred to me. :-D

Dec-20-16  Abdel Irada: ∞

<If losing a bishop was a resignation matter I would be resigning a lot of games a lot earlier than I do!>

Whether losing a bishop is cause for resignation depends on the strength of the players. In a master game, it is more than sufficient.

Dec-20-16  PJs Studio: Don't take the rook. Don't take the rook. Don't take the rook!

Ugh. He took the rook.

Dec-20-16
Premium Chessgames Member
  gawain: I thought about how to trap the black queen, but was so focused on an immediate 9 Nb3 that I never considered 9 axb4!
Dec-20-16  YouRang: <Abdel Irada><I have to admit that 9. hxb5 is a move that never occurred to me. :-D>

One must think on a higher plane to consider such moves. ;-)

Dec-20-16  catlover: Poor Hanssen. Looks like the kind of trap I'd fall for.
Dec-20-16  lost in space: <<YouRang>I looked at <9.hxb5 Qxa1> a couple times before noticing that that <10.Nb3!> hits all the right squares: Attacking queen on a1, guarding the bishop on c1 and sealing off the escape square at a5>

Yeah, same for me. It took me ages to find Nb3, even though this was also a theme in game 11 of the Fischer-Spassky match. Even though completely different it was somehow similar...


click for larger view

Dec-20-16  NBZ: They say backward queen moves are often the hardest to find. This is a backward knight move that is surprisingly tricky to find.

Black MUST have looked at Qa5 Nb3 with the threat that if the queen moves, White can play axb4. But of course Qa5 Nb3 is straightaway refuted by Bxc3+. I think Black saw this, and dismissed Nb3 as a serious possibility, not realizing that reversing the moves (axb4 first, and then Nb3) is much more dangerous.

Dec-20-16
Premium Chessgames Member
  Bubo bubo: White simply wins a piece with 9.axb3; Black cannot recoup himself with 9...Qxa1, because then 10.Nb3 will trap the queen, for a net win of Q for R+P.
Dec-20-16  YouRang: <catlover: Poor Hanssen. Looks like the kind of trap I'd fall for.>

Yeah. I'd probably be right in the middle of my victory lap around the table when white plunks down 10.Nb3!.

It's always embarrassing when your victory lap is interrupted.

Dec-20-16  MaczynskiPratten: It also feels non-intuitive that the Black Queen can have no safe escape square out of the 8 on offer (plus a1 itself). But all 9 are covered by White's four minor pieces - the Knights side by side and the Bishops on their starting squares. A pleasing symmetry!
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