Try to solve a Sudoku puzzle.

“sometimes I do this when I wanna do a quick match and only have like 5 minutes on me. I get the hardest difficulty on my favorite website, mark everything, and try finishing. at first I thought it was cheating, but after maybe 2 puzzles of doing this, I realized it came with its limits. say I found locked pairs, naked singles, locked triples/quadruples, basically doing ever basic technique that doesn't require much marking past the numbers (lines and color coding and etc.) and I fill in the numbers for the answers I got. okay cool, that still leaves me with half of the board still needing some genuine thinking. it pushed the easy numbers out of the way, meaning I was left with the harder things to figure out, which made it a big challenge. all of a sudden, I ran out of pairs, singles, x-wings, etc. and it forced me to learn new techniques. it was honestly a cool experience! I do it now when I want to encounter a new technique "in the wild" so I have a reason to learn :)”

“Practice Practice Practice. That’s all I did this month. I was already aware of the rules of sudoku, so I had a good start with easy level puzzles. I downloaded an app called Sudoku.com for practice which helped me a lot. It has questions of 5 levels — easy, medium, hard, expert as well as evil. Well, I also bought a sudoku puzzle book from a local book fair, as an attempt to reduce my screen time. It’s a good book with over 200+ sudoku puzzles. I even tracked time while solving puzzles, which helped me to speed up my thinking process. [...] I can’t say I have become an expert in solving sudoku, because I still get stuck in hard level puzzles. But overall, I can solve most puzzles I practice within a decent time. In this 1 month, I solved 70 puzzles, which is a good start I guess.”