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The rook is usually far superior to the bishop in an endgame. But the following position was thought to be drawn until Noam Elkies proved in 1993 that White always wins:
Note that in the replay windows below you can click on the notation to follow the game.
The knight really is a tricky piece. White is winning, which means his team will be safe in the German Bundesliga. But if he looses then most probably there will be a match for relegation between his team Griesheim and SF Berlin. So the game really was very impotant: