I just checked and if you want to be technical it's "move to normally, could move to during a capture if a piece was there, or holds a piece you could capture".
Pawns are the only case that where those three are different but they see all three:
- directly in front (move)
- forward-diagonal (normal attack)
- horizonal exactly only in the case of a enemy pawn moved to that square last turn that can be taken en-passant (capture). That square goes dark if you move another piece.
Pawns are the only case that where those three are different but they see all three:
- directly in front (move)
- forward-diagonal (normal attack)
- horizonal exactly only in the case of a enemy pawn moved to that square last turn that can be taken en-passant (capture). That square goes dark if you move another piece.