When analyzing a game, it shows a magnifying glass icon next to your move and the best move that lets you follow the line, which is nice. However looking through the line of the best move more often than not leads to a horrible evaluation and includes inaccuracies and blunders the closer you get to the end of the line. Shouldn't they be the best moves?
I understand that the initial depth towards the end gets lower compared to the depth that analyzes each move, but then maybe the two top moves shown that let you explore the lines need to be calculated to as deep as the line and the "regular" depth added to that depth, so that reaching the line still displays the best moves.
For example in this game: https://www.chess.com/de/live/game/3520353612
Actually something even weirder just happened. On move 15. I played Qh4+ and it showed it as my only mistake
and said that Qc7 was best. I went through that line and it ended horrible, so I started writing this thread, wanted to go back to write the evaluation number that the mistake and best line end up as, but now, well, take a look
I mean, I wouldn't mind if my opponent took his own queen with his bishop, but I'm not sure that's how it works...
After refreshing I was able to run it again. The mistake line leads to +0,86, the best line leads to -4,99 but that's because the last move is a giant blunder that loses the rook for a pawn and the engine shouldn't include moves like that in an evaluation line