Develop the logic while playing! Don't waste your time, relax playing a useful game!
The purpose of the game - the sum of the remaining numbers should be minimal. And maybe you will be able to cross out all the numbers?

In the game field are written numbers from 1 to the maximum number you selected. Each digit in a separate cell.
Cross out pairs of the same numbers and the numbers the sum of which is 10. Develop a strategy, find the optimal algorithm. The game will go to the next level as long as there are possible moves.

Depending on the maximum number and number of columns that have been selected, the game has a lot of alignments. Win in all alignments, get the maximum scores, cross out as many digits as possible!