The Change of the Tide
It is crazy how tides change. I was just playing a game of chess here on Chess.com and I had full confidence that I had the ability to win the game. When I least expected it, the box username won with a checkmate popped up and that made me so disappointed. The change of the tide is one of the worst things that can happen to you in chess when it comes to checkmate in my opinion.
My biggest tip at this moment is that when you believe you are going to win, do not let down your shields and have your hopes up before you know it is certain you have claimed victory. This could be you biggest down fall.