[FEN "6nN/Bp1k2pp/2n5/p7/Q4R1P/5pP1/P3qN2/4K2R w K - 0 1"]As you can see my king got checkmated through the enemy's queen and pawn.
My question is, why is this a checkmate? I haven't moved the king as well as the castle to the right.
Why can't I swap them, so King=g1 & castle=f1, saving the king and evading checkmate?