libs/chessx-pgn/guess/common.h
// square_FlipDiag:
//   Return the square flipped along the a1-h8 diagonal.

Return the square flipped along the a1-h8 diagonal.
Return the square flipped along the a1 - h8 diagonal .
inline squareT
square_FlipDiag(squareT sq)
{
    return square_Make(square_Rank(sq), square_Fyle(sq));
}
inline squareT square_FlipDiag ( squareT sq ) { return square_Make ( square_Rank ( sq ) , square_Fyle ( sq ) ) ; }
square_FlipDiag:
Return the square flipped along the a1-h8 diagonal.
square_FlipDiag : Return the square flipped along the a1 - h8 diagonal .