Why 28th Bb2 mistake

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Avatar of raptormancom

after 27.Bh3 in this position white can only move the bishop to avoid mate, the bishop can go to two squares, Bb2 or Ba3

two moves are not the same for white, one gives advantage to black, with so tactical moves. In the game black didn't find correct one.

I'm new in chess.com app how do I put the example of my game in problem mode?

Avatar of raptormancom

https://www.chess.com/game/live/81105150541

I don't know hoe to put game board