There are 7 pieces you must bomb in Snow Wars. Different pieces take up different amount of spaces.
I tried many strategies before I found the one that worked for me. I was stuck on level 10 so I finally decided to use statistics. I played 10 games and did screenshots of every game. For every space on the board (there are 48), I did a percentage.
Once I began using the percentages, I did much better and eventually won. You must know that you don’t have to follow the percentages EXACTLY. I usually followed the percentages until I found the two small snowmen, then I used common sense to find the pieces that take up more than one space.