further improvement :)
237189.8
[0.649pts]
236838.05
[0.65pts]

improveeeee
now we can reach the first column from any direction, moving up or down..
skipping tiles even if difference between columns is 1.
231625.9
[0.664pts]
220471.675
[0.698pts]
checking to skip at every step together with row 1 or N-1;
okay so this stuff works...but not so good yet.