Ok, thanks for advice.
I am changing transparency in next update: it works this way because I have always used it to hide places where a hovered number should not go.
So I can make that: if the user hovers a blank cell numbers out of influence are transparent and if the user hovers a filled cell the transpaarent cells are those out of the influence. do you agree? what is the scheme color that you like least?
It works that in "each plane" (3 vertical 3 parallel to ground and 3 lateral) must go numbers from 1 to 9.
You are right about tutorial, but you can always find a video tutorial here: http://vaevictis.it/roxdoku/support.html