Nxc2+ forks the rook, but gets recaptured by the queen, which we can attack with Be5
Nxa2 captures the pawn, forces the recapture with the rook, and white cannot castle long
Na6 is safe but not great
I'd go with Nxc2+. Capture a pawn and get a tempo on the queen
Nxc2+ forks the rook, but gets recaptured by the queen, which we can attack with Be5
Nxa2 captures the pawn, forces the recapture with the rook, and white cannot castle long
Na6 is safe but not great
I'd go with Nxc2+. Capture a pawn and get a tempo on the queen