Engine or Human ?!

Hi, all! The opponent has 39 excellent and 1 good move. What do you think, can human play like this? It could be if you make a 0-15 move but here has 40 moves.  I am in the interest of your opinion. It happened on my second account 1966 and opponent 1911. (on chess.com)

I am black here.

first of all, what is his rating?

1911

Which engine rated 1900 do you suspect your opponent used?

I did not make a blunder,  my statistics 30 excellent, 6 good,  1 mistake, 2 inaccuracy. (on deep analyze)

His rating is 1911, not engine rating.

I did not talk about the end of the game actually. Commonly.

I'm quite sure your opponent used an engine. According to Stockfish 9, his average centipaw loss is 7, which is super gm level.

His only 2 inaccuracies come from non-optimal mate sequences. 

Well, in other words, he made a perfect game.

base on your rating and his rating. I think it should a close game. a lot of his moves look like GM moves. I think you should report to chess.com.

Was this a blitz game? If so, pat yourself on the back for playing well as a 1025 vs a 1900. 

The rating difference is large enough that your opponent can make the most out of every inaccuracy have small someone like you or me make. Blitz wise, I’m about the same as you and I didn’t get the sense of engine play from your opponent.  He or she just kept making solid moves and slowly improving position when able. If this were a slower game with more time to think, the odds stack up even higher against people like you and me versus opponents like him or her. 

This is not the main account of me (I am a premium user here and use it as a tactic for fun.), that is why do not pay attention of rating here. The game was 30 min standard.  He played good but did not see optimal mates there. Do not you think after 2 queens he started to play as himself. And for high rated players who need more queen for a mate in that situation?

So are you saying you have multiple accounts on this site? If so I guess it takes one to know one.

Yep, in the endgame he started to play by himself. He's a cheater.

HOWEVER, you are also very strange, tbh. You said your second account (which is already prohibited) is 1900+, but your OP profile is way weaker than 1900.

I think this thread should be locked.

Maybe. IDK.

Don't pay attention to your rating, his only. Maybe he has another account at 2500, or just saw a different mating pattern under time trouble???, and plays this account for fun.  I think you are too concerned about cheating while you have multiple accounts "for fun," which is also a sort of quasi-cheating, based on rating disinfo.  My 1 cent.