How to use "Practice mode" more effectively

[n4pll]

Zuril, what is your "number system (problem numbers)" for endgame, tactics, and checkmate?
I wish to use the practice mode more often. I know that a comma "," is not used for a 4 or 5 digit number (between the third and fourth digit).

Thanks for the "spring cleaning (if you live on the Northern Hemisphere of the Earth)" you are doing to eliminate bad problems.
N4PLL

[n4pll]

Thank you Zuril for 2 things:
1. You made the solution buttons easier to press with the mouse.
2. No more checkmates in the 600 point range. You now have checkmates within 400 rating ELO points.
N4PLL