Better Reversi habits

Do not chase the largest flip in the opening. Early discs are easy to lose, and a flashy move can leave you with fewer choices on the next turn.

Corners matter because they cannot be flipped. A move that gives your opponent a corner is usually expensive, even if it wins a few discs right now.

Mobility matters because the player with more legal moves usually controls the pace. If your opponent only has one awkward move, you may be in charge of the position.

A useful rule of thumb: if two moves look close, choose the one that gives your opponent fewer good replies, not the one that flips the most discs immediately.