Impossible Drills

In chess.com/drills/mastergames the following drill sounds like it should be possible to win, but I can't do it even when I use the suggested best moves or when I use an engine. This is just one example out of many. Is there an explanation for this that I am missing?

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Kotov vs. Botvinnik: Breakthrough With Opposite Colored Bishops

Are you as brilliant as Botvinnik? We believe you are! How did the Russian patriarch break through the white blockade and show that opposite-color bishops do not always guarantee a draw?

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It's actually pretty ridiculous they have Level 10 Stockfish we can be expected to beat it. I also had problems with that Drill.

Update: After checking the game I now know the correct first move, but this is most of the time given as an inaccuracy that loses the advantage. So there seems to be some issues with the hints...