The Ultimate Cheat Sheet on 롤대리
http://johnnyaely060.westbluestudio.com/15-up-and-coming-loldaeli-bloggers-you-need-to-watch-1
These are typically referred as givens. Ideally, at the conclusion of the game, each and every row, column, and location have to include just one instance of every numeral from 1 via 9.