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Alexander Onischuk vs Ramon Mateo
Calvia Olympiad (2004), Calvia ESP, rd 1, Oct-16
Queen's Indian Defense: Fianchetto. Nimzowitsch Variation Quiet Line (E15)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Oct-19-04  me to play: Alexander really worked for the point in this one,finally trapping the knight in an interesting and relatively rare endgame.
Feb-27-06  patzer2: Can two Bishops win against a lone Knight. Well it happened in this game.
Feb-27-06  YouRang: <patzer2: Can two Bishops win against a lone Knight?> Good question. I suppose that the intuitive answer for mere mortals is "no".

However, if you check a Namilov tablebase, it appears that almost any combination of K+2B vs K+N wins! Often, it's a win in 60-70 moves, but a win none-the-less.

In this game, the position after 83...Ng6 is relatively easy mate-in-35! :)

Following the tablebase, it appears that the strategy is just to separate the knight from the king, then trap and win the knight. It turns out that it really doesn't look that hard. I bet a decent chess player could figure it out against a computer.

Feb-27-06  patzer2: <YouRang> Thanks for the information. Looks like it can be done, but might be difficult in some instances in the face of the 50-move draw rule.

My guess is Onischuk was somewhat familiar with the ending, or else he wouldn't have gone in for it here.

Aug-16-09  WhiteRook48: 102...Nf1 103 Ke2 wins!!
Oct-29-17
Premium Chessgames Member
  Bubo bubo: <YouRang: I suppose that the intuitive answer for mere mortals is "no".>

Of course an advantage of just one minor piece isn't that much in the absence of pawns. On the other hand, since on the near-empty board the bishops can display their teamwork and range against the short-legged knight, a win does not seem to be completely counter-intuitive.

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