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Larry Mark Christiansen vs Vladimir Kovacevic
Chess Olympiad (1990), Novi Sad YUG, rd 12, Nov-30
Queen's Gambit Declined: Exchange. Positional Variation (D35)  ·  0-1


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Kibitzer's Corner
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Premium Chessgames Member
  patzer2: White's 28. Qc5?? allows Black to play today's winning puzzle solution 28...Nc4! for an instructive Queen trap.

Instead of 28. Qc5??, White would have been OK after 28. Bd3 with an even game.

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  Dionyseus: I did not get it, I was looking for a mate.
Premium Chessgames Member
  YouRang: Got it. After the first two puzzles this week, I spent some time looking for a clever mating attack. But after getting nowhere with that, I just looked for a good move. At that point, 28...Nc4 became fairly obvious, as it neatly locks up the queen for impending capture after 29...Bd6 (or 29...b6).
Nov-09-05  klausewitz: 28. ...Nf4, great move! Don't get the puzzle... Looking for a mate, like Dionyseus.
Nov-09-05  klausewitz: Nc4! Sorry!
Premium Chessgames Member
  kevin86: I,like many others,looked for a mate-but soon noticed the queen trap. There are many fine queen traps-maybe that could be a theme some time.
Nov-09-05  BipolarChessorder: It would have been better to play 29. Qxe7 rather than wait for 29...Bd6 (White at least gets a rook for the Queen). btw, that's what makes 29...Bd6 superior to 29...b6.
Nov-09-05  sharpnova: after Nc4, what if white plays Ne2? now the bishop can't attack the queen
Premium Chessgames Member
  notsodeepthought: <sharpnova> Not with Bd6 as in the game, but Bb6 will win.
Nov-09-05  Norman Glaides: I might as well go kill myself now, first time I've not got a wednesday puzzle.
Premium Chessgames Member
  YouRang: <BipolarChessorder> ... <btw, that's what makes 29...Bd6 superior to 29...b6.> Actually, 29...b6 is MUCH worse -- the queen trap falls apart when black's queen is counter-attacked by 30. Bd7!

If 30...Rxd7, then 31. Qxc6 (the rook blocks the queen's defense of the c6 pawn)

If 30...Qxd7, then
31. Qxd7 Qxd7
32. Nf5+ (forking and winning black's queen)

Premium Chessgames Member
  al wazir: It's hard to believe Christiansen didn't see that his queen was trapped. Why else did he play 29. e4 ? But then why didn't he continue with the line 30. Bd7 Qxd7 31. Nf5+ suggested by <eaglewing>? And why did he go on playing after losing his queen?
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  YouRang: <sharpnova: after Nc4, what if white plays Ne2? now the bishop can't attack the queen> But black still has 29...b6 in that case.
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  HoopDreams: Nc4! figured it out. Figured it out in like 3 minutes. At first i looked at bishop sac on b6 - Bb6.. because after Qxb6 Nc4 Qc5 b6.. the queen is trapped. But that wouldnt work because after the first move Bb6 the Queen can just run away. So then i found the great waiting move Nc4, that sets the queen's trap
Nov-09-05  awfulhangover: Took 30 seconds. I'm improving!
Premium Chessgames Member
  OhioChessFan: <It would have been better to play 29. Qxe7 rather than wait for 29...Bd6 (White at least gets a rook for the Queen).>

That is what I thought playing through the game. I haven't seen anyone address 29 Qxe7. I'm sure there's some simple refutation but I sure don't see it.

Premium Chessgames Member
  YouRang: <OhioChessFan> <I haven't seen anyone address 29 Qxe7. I'm sure there's some simple refutation but I sure don't see it.> I think the "refutation" is just 29...Qxe7. That is, black wins a queen for a rook, which should be enough for a fairly easy black win.
Premium Chessgames Member
  nateinstein: I think it took me around a minute. Not much to do on the kingside, went to the queenside, then trapped the queen :).
Nov-09-05  Ashram64: I dont really understand how the Queen is trap after 29. Nh5+ Bxh5 30. Bxc7 Rxc7 still can defend the Queen for a while..but white's position is lost.
Premium Chessgames Member
  unferth: surely this was a blitz game? otherwise Christiansen resigns on move 30 ...
Premium Chessgames Member
  unferth: <Ashram64><I dont really understand how the Queen is trap after 29. Nh5+ Bxh5 30. Bxc7 Rxc7 still can defend the Queen for a while..but white's position is lost.>

Instead of 30 ... Rxc7, 30 ... Bxd1 leaves black up a clear rook--not much different than the N for Q in the game continuation. But all roads lead to the abbatoir; the assorted mistakes & white's playing on beyond the point of reason make me pretty confident this was blitz, or at least severe mutual time pressure.

Premium Chessgames Member
  MaxxLange: Probably Black's flag was dangling, White resigned at move 40.
Premium Chessgames Member
  Richard Taylor: I solved this one but it took me a finite time! Christiansen is a great attacker - must have been a rare error by him.
Oct-07-06  aazqua: What a collosal blunder by christianson. The queen trap is as obvious as the disgust must have been on his face afterwards. I like the extra half dozen spite moves.
Nov-22-06  Dougy: An interesting idea is 29. Bd3, preventing the queen trap. E.g. 29... b6 30. Nf5+ Kf8 31. Qxe7+, or 29... Bd6 30. Nf5+

But this is refuted by the line:
29. Bd3 Bxg3! 30. Bxc4 Bxh2+ 30. Kxh2 dxc4

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