100 doors 2013 level 119, is about moving a knight chess piece but you not allow to moving on the middle of board, check picture below for detail

board is divided into 3×3 array, with number from 1 to 9, chess knight can not be at 5. so this is the sequence of chess knight movement.
from 1 to 8, 3.4, 9, 2, 7, 6, and finally back again to 1
numbers that past through by knight chess is a number that you have to tab on the keypad: 183492761
