Hello. One question:
black plays pawn f5; white plays pawn h3.
Why white's move is a blunder and why white should have made Ne5? (this is what analysis said it's the best move. why exposing the Queen?)
If you read the analysis, it tells you. White has a nice combination available, getting three pieces for the queen and a favorable position.

Whereas, on h3??, you lose a piece and more and your hair falls out.

Hello. One question:
black plays pawn f5; white plays pawn h3.
Why white's move is a blunder and why white should have made Ne5? (this is what analysis said it's the best move. why exposing the Queen?)