10. As shown in the figure, it is a chessboard. The chess piece "Knight" can move from one square, jumping 2 squares horizontally or vertically, and at the same time jumping 1 square in the other direction, forming an "L" shape. For example, from point A in the figure, it can reach any of the B positions in one step. Then, for a chess piece "Knight" to jump from the bottom-left corner of the chessboard to the top-right corner, the minimum number of steps required is $\qquad$.
$6$