First known computer-found error in expert chess analysis What is the first known example of published expert chess analysis that was disproven by a computer search, with the winning player completely opposite? That is to say, a widely known published analysis by a chess grandmaster of a position with the conclusion that it was winning for one player, but later a computer search proved that actually it was winning for the other player. This comes close, but I am curious to see examples with win-to-lose reversal of opinion. To clarify, I am looking for the first time we discovered that the previously accepted analysis was wrong, and our discovery arose from a computer search.
In the early eighties, the evaluation of the two bishops vs knight endgame was changed thanks to computer-assisted analysis.

Previously, that endgame was thought to be a draw, but now we know the bishops can force a win.

I don't know if this is the earliest instance, but it's definiely a quite old one