Why is this move a blunder?

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Avatar of Flaze07

Doesn't this move sort of pin the bishop, well sort of since the bishop is able to protect the rook with Bh4

Avatar of DiscipleOfKeres

Yes, your move pins the bishop, but Qf2+ wins the rook.

Simply put, your move lost some advantage, but you are still winning by a margin.

It wasn't the best move, per se.

Avatar of Ja_rekl_tohle

You missed fork on king and rook on Qf2+ (queen is guarded with rook) and king must move to h1 square and then you take rook