Best move for white

Black is threatening to checkmate white with Qf2+ and Qf1 mate. But white comes with a brilliant plan on his own.  Black resigned.

Best move for white

The bishop is protecting two pawns. One pawn is threatening to be pass pawn.  The white king is guarding this pawn. What is best move for white and win.

Best move for white

In the real game Magnus exchanged the queens and the knight with the Bishop. Find how and win.