if you in winning position you must be familiar with +M1 (white) and -M1 (black) the M1 will appear if your opponent making a blunder or his winning metre drop to 0% that mean you get +M1/-M1 and if you get M1 or M2 its mean just 1 or 2 more move left to win and if you win you will get M0, M0 its mean you win the game because you found the checkmate move
Finding Checkmate
