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John van der Wiel vs Sipke Ernst
Harmonie (2004), Groningen NED, rd 4, Dec-24
Italian Game: Two Knights Defense. Polerio Defense Bogoljubow Variation (C58)  ·  1-0
ANALYSIS [x]

FEN COPIED

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sac: 14.Qxf4 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Jan-02-05
Premium Chessgames Member
  cu8sfan: What a fun game! Thanks, <cg.com> for pointing it out. Was there a brilliancy price in this tournament?
Jan-02-05  euripides: A beautiful game. It looks as if the Q sacrifice was based on judgement at least as much as calculation, since White has some developing moves to play before his attack gets going.

21 Nc4, when 21...Nb7 can be met by 22 Be5+, is also an unexpected and economical attacking move - it looks as if Black's knight is exposed so that White might not consider the option of forcing its exchange, but it turns out it's the square a5 that counts.

Jan-02-05  MoonlitKnight: I'm glad to see the 8.Qf3 variation being used at this level. I thought only patzers like me would play it.
Apr-07-05  psmith: Note that:

At first I thought 22...Qd8 was a blunder, but:

22...Qd7 23 Be5+ Kc8 24 Nd6+ Kd8 25 Nf5 gf5 26 Bb8

22...Qd7 23 Be5+ Kb7 24 Nc5+

22...Qd7 23 Be5+ Kb6 24 Rab1+ and mates with Bc3 and Na5.

Feb-05-07  Timothy Glenn Forney: I was shocked to see my shedder pick 8.Qf3 as the best move.It sees 9.Bxc6+ as a better line although.It didn't pick the the Q sac but after analysis later it proved it to be sound.Great Game.
Dec-26-08
Premium Chessgames Member
  GrahamClayton: What if Black plays 15...♖g8? Does White have nothing better than 16. ♗f6, as in the game, or is 16. ♗h6 a better option?

Van Der Wiel has only a B, N & 2 pawns for the Queen sacrifice, but he must have had a feeling that he was "equal" positionally.

Aug-05-11  freakclub: Interestingly, 14. Qxf4 leads only to equality with proper play by Black, according to Houdini, and suggests 14.Ba3 instead.
Feb-03-14  Andrew Bussom: This is a good example of the success of the 14 Qxf4 Queen sac discussed in "Two Knights a Chess Killing Machine with an Emphasis on 4 Ng5."
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