I have the key.31. But how it to use ?

Each group seems.

I stuck too. What is {Key.31} related to another page ?

Pls help I have no idea. Is my solve method wrong ?

Thank you I solved. But It imposible to read last number .

I can' t read letters.

I solved !!! Thank you.

If location is represented by 8 rows and 8 columns, The king location is row 2 and col 1, The knight location is row 8 and col 8. To get the numbers for solve, I will trace between knight and king using knight steps. So I will get the sequental numbers 31664 of 3166449985572 that reach until the kin...

PLS more hint. What mean about "where the horse stands".
"Figure 1" is the horse stand sequence number 4 ?

I tried "316..." 5 digits. But it is wrong. Please some hints.
The number that passed by the knight's movement to reach the king?