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Viktor Korchnoi vs Andrejs Petersons
USSR Championship (1964/65), Kiev URS, rd 15, Jan-19
Queen's Gambit Accepted: Janowski-Larsen Variation (D25)  ·  1-0
ANALYSIS [x]

FEN COPIED

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sac: 28.Bxh6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 4 ·  Later Kibitzing>
May-16-07  crwynn: <It took me a few minutes. I saw that wonderful K+Q knight fork that was being stopped by only the bishop, but it took me a while to notice that after trading my queen for that bishop, I can use the rook to force the king back into it's forkable spot -- this time without the bishop to prevent it. Funny thing is, I thought the combination ended up winning a piece. I didn't notice that it was mate, lol.>

I had the same problem - this should have been easy and indeed I thought Qe7 right away - except that after Rg7 Ke8 Nf6+ "followed by" (how?) Nxd5 Black recaptures on d5 and is still up a piece. So I dismissed the variation until I saw that Nf6+ and "king moves" was not quite possible....

Funny that when you notice a motiv (forking k and q) you can miss that it is entirely irrelevant to the combination.

May-16-07
Premium Chessgames Member
  fm avari viraf: A stunning Queen sacrifice thats leads to mate with a gallant N & R combination.
May-16-07
Premium Chessgames Member
  playground player: Solved it right away, must be getting smarter. Once you realize that due to the placement of the White Knight, the Black King has nowhere to go, the White Queen becomes expendable.
May-16-07  wals: One for me
May-16-07
Premium Chessgames Member
  doglikegroove: <YouRang: Funny thing is, I thought the combination ended up winning a piece. I didn't notice that it was mate, lol.>

Ditto. Glad to see it wasn't only me. I was very proud of myself for coming out a bishop ahead via the royal fork. D'oh!

As they say: always check, it could be mate.

May-16-07  nateinstein: Put me in the Monday group. I thought I was miscalculating something because it seemed too easy for a Wednesday. Guess I've just seen a similar tactic before so it came to me quickly.
May-16-07
Premium Chessgames Member
  patzer2: The demolition sacrifice 28. Bxh6!!, followed by 30. Qg4 and 31. Qg7+, sets up today's mate-in-three with 32. Qxe7+!
May-16-07  waddayaplay: It took me some time to find it (although I did eventually). Didn't consider that the kind would be checkmated. I don't think I've seen a king being checkmated by a knight in between two of his own pieces before.
May-16-07  Crowaholic: <YouRang>: That's exactly my story. I tried so hard to make the fork work that I accidentally ended up checkmating the opponent. The funny thing is that the fork, if it wasn't mate, doesn't actually win a piece because Black could take the knight with one of the pawns. Oh, well...
May-16-07  iamverywellatchess: Yes, hello again com.chessgames, it is very well to see you again so fine!
May-16-07
Premium Chessgames Member
  Marmot PFL: This and Tuesday's both took a while. The tactics don't seem to click for me right away sometimes. I could see the key was elminating the Bishop that guarded f6, but didn't expect a queen sac. Of course black didn't either.
May-16-07  nateinstein: Actually, if I remember correctly, Monday's puzzle took me more time this week than Wednesday's!
May-16-07  iceman77: Spot it within a minute. The white knight guards the two escape squares for the black king. So the white rook can force the black king back into the last rank for the knight to execute the pretty mate!
May-16-07  Brapp: I agree - Monday's puzzle gave me more fits than this one. In Monday's puzzle the position was just so darn complex. There really isn't that much to look at in this one. The key is to see that after Rg7 the King cannot flee to the 6th file because the knight guards those squares.
May-16-07  LivBlockade: How does White continue against 30...Rec8 (instead of 30...Red8)?
May-16-07  gBizzle: man, what a easy puzzle, solved it in like 1 second
May-16-07  chessfritz1: After 30..Rec8, white continues with 31. c4! (the pawn is poisoned because the black queen guards a5) 31..Qa5 32. c5!! .. Ke8 33.Qh5+ ..Kd8 34. Rg8! and white wins after pinning the bishop
May-17-07
Premium Chessgames Member
  YouRang: <Crowaholic: <YouRang>: That's exactly my story. I tried so hard to make the fork work that I accidentally ended up checkmating the opponent. The funny thing is that the fork, if it wasn't mate, doesn't actually win a piece because Black could take the knight with one of the pawns. Oh, well...>

Yeah, that makes it even funnier: I accidentally mated my opponent in a flawed attempt to win a piece! :-p

Jun-03-07
Premium Chessgames Member
  notyetagm: <patzer2: The demolition sacrifice 28. Bxh6!!, followed by 30. Qg4 and 31. Qg7+, sets up today's mate-in-three with 32. Qxe7+!>

A famous Korchnoi combination.

Jun-03-07  Wolfgang01: Victor, the „terrible“ sacs his queen and gives a nice and economic mate.
Apr-09-08  Whitehat1963: I like you. I like chess. It is very nice. iamverywellatchess.
Jul-20-09  AlforChess: Looks as if 30. c3-c4! was more accurate, with the idea of doing whatever it takes to get Black's queen off the fourth rank in order for White to play Qh5!. This difference would have shown up if Black had played a stiffer defense, instead of allowing the beautiful knight mate. Of course, Viktor was also won after his choice for move 30.
Sep-26-11  birthtimes: Black's 22nd move was 22...f6, NOT 22...f5.
Dec-29-12
Premium Chessgames Member
  FSR: Magic on the chessboard!
Dec-23-15  jerseybob: Through the early part of the game black acts as though the move c5 is illegal. Korchnoi's attack is impressive, but he's given a totally free ride in the center to build it up.
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