These little shapes show up on every board. Learn to spot them and you'll solve most positions at a glance.
In the pictures: green = still hidden, red with 💣 = must be a mine, green with a dark ring = proven safe.
A 2 next to a 1 shares two squares with it. Those two hold at most one mine, so the square the 2 touches on the far side must be a mine.
Along a flat edge, read 1-2-1: the mines sit opposite the two 1s, and the square opposite the 2 is safe.
Along a flat edge, read 1-2-2-1: the mines sit opposite the two 2s, and the squares opposite the 1s are safe.
A number that touches exactly as many hidden squares as its value: every one of them is a mine.
Every daily board is solvable with patterns like these, so the fastest way to learn them is to play.
Three numbers 1, 2, 1 in a row along a flat edge of hidden squares. The two mines are opposite the 1s; the square opposite the 2 is safe.
Four numbers 1, 2, 2, 1 along a flat edge. The two mines are opposite the two 2s.