There is one example: Concerning the endgame of (K+2B vs. K+N). For 300 years this endgame was considered to be a draw. This in spite of years of concentrated analysis. In a book written by GM John Nunn, Minor Piece Endings, he details how the computer was able to calculate a win. What the computer demonstrated was that the Bishop gains a tempo when it rebounds off the edge of the board. The gain of a tempo by the B has been known for centuries. What the human brain could not conceptualize is the gain of a tempo from a broken horizon.
That is my best attempt at explaining after many years of having read the last chapter of the book.
, not
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Is human better than computer? All computer are made by humans, so humans are better than humans. x>x never, so the whole question is absurd.