No.
Game Analysis
Tonydal, on the game analysis, it assigns a "score" as you play, which I believe is supposed to somehow relate to material advantage, position, etc. As a 1300, I have lost many games (embarrasingly so) when I was "up" be even wider margins.... For you, being up a piece probably leads to a win, but not for me.
Can someone explain to me how, if my opponent makes a move, and that move leads for me to be able to mate on the very next move, how this is considered a "mistake" and not a "blunder"?