Perhaps this is the reason you purchased a diamond membership. Only diamond members get this kind of learning experience and privilege...
Why didn't ask him to elaborate all the conquers he calculated...? That would have been fun!!
For example, this one looks hilarious after 12.0-0 :
" The damage is done, I lost a bishop, so I castle. As I said, in case of exchanging my knight for your bishop, I won't have two pawns in front of each other, so: "
The definition of concrete analysis. 
ps: it's only a pure coincidence if the last 26 moves of the game are the best recommandation by stockfish .
Try again...you blew an easy win. Simple as that.
Given it was a daily game, he had enough time to look at many moves. As far as the bogus system, they can work now and then. Very plausible that he meet someone who he thought was or claimed to be a grandmaster and that therein is the resulting 'wisdom'.
Probably a victory that he will remember...why not let him have that memory instead of falsely accusing him of using a computer?
The guy has 500+ games with a 1300 rating. You achieved a winning advantage because he played like his rating and blundered, and you returned the favor blundering the win away. He played no tactics thereafter, just simple basic play. And you are accusing him of cheating? Think before you leap. Your allegation is extremely ill founded -- that someone with a 1300 rating over 500 games decided to cheat for a part of one game consisting of basic moves with no clever tactics. Sure there were a couple of knight moves that were rather precise for someone of his rating, but they weren't anything so fancy. And that was basically it -- most of the other move choises were really basic. It is possible -- its always possible if there is a match for a sequence of moves -- but your predicate is woefully insufficient for an allegation to be made in good conscience by a responsible player.
This game was at a U1100 tournament😂!! You have fide 2000 and 2000 in blitz ! I am sorry for everyone U1100 or U1499 player that met you in the respective tourneys. I guess you won hundreds of them just for fun. Also, I agree with the comment #3 mostly. Good game. (maybe)
The guy has 500+ games with a 1300 rating. You achieved a winning advantage because he played like his rating and blundered, and you returned the favor blundering the win away. He played no tactics thereafter, just simple basic play. And you are accusing him of cheating? Think before you leap. Your allegation is extremely ill founded -- that someone with a 1300 rating over 500 games decided to cheat for a part of one game consisting of basic moves with no clever tactics. Sure there were a couple of knight moves that were rather precise for someone of his rating, but they weren't anything so fancy. And that was basically it -- most of the other move choises were really basic. It is possible -- its always possible if there is a match for a sequence of moves -- but your predicate is woefully insufficient for an allegation to be made in good conscience by a responsible player.
Sure, if you think so, then i should probably implement the SCAP method of my opponent
https://lichess.org/CELieiIx I just find it quite funny. And chess is not only about tactic ... the knights moves are rather precise, and the explanations behind them are just funny, that's it.
And look at his "analysis", :
"bishop exchanges" ==> that's not just a bishop exchange.
"I don't understand why he didn't take the pawn" ==> maybe because i won't sacrifice a full rook for the h4 pawn ....
"i could play Qc2, then he would play c5, bxc and then the knight would be pined"==> there are no way on earth nobody of us would move a pawn which is pinned just to offer it to the opponent.
"The knight is protecting d4. If I move the knight to attack (in two moves) the h rook, the pawn in d4 is unprotected. I can choose now between Nh4 (to attack the h rook later), Qxf6 or g4. I went for Nh4 to attack the rook later. " ===>> if i take the pawn Qxf6 and i stand no chance at all, 3 connected passed pawns is a point of no return in that position. So in essence he didn't see it and only played it to attack a rook in two moves ? seriously ?
"he didn't go for the exchange so i just take it" ==> lol , if i was to exchange knight i would be forked .
"pawn exchange, rook captures pawn and check). So Kg2 is a good move for me. The Italian grandmaster told me that, in case of a 3 diagonal pawns, it's good to have the King attack outside the triangle. I never understood this thing to be honest, I can understand that it's good to have the king far from the corner when not so many pieces are left on the board." ===> i don't understand it, but that's the first time that i know "go away from the corner" rather than "centralize the king" .
Perhaps this is the reason you purchased a diamond membership. Only diamond members get this kind of learning experience and privilege...
Why didn't ask him to elaborate all the conquers he calculated...? That would have been fun!!
For example, this one looks hilarious after 12.0-0 :
" The damage is done, I lost a bishop, so I castle. As I said, in case of exchanging my knight for your bishop, I won't have two pawns in front of each other, so: "
The definition of concrete analysis.
I paid the membership to suport Chess.com , and to help them pay the servers and so on, and because i don't mind 100 usd or so a year. But in the end i don't care much.
c4 protects d5. After 3 ..e6 I've seen that the d5 cell is double-protected from the black, so:
The knight protect the pawn in d5. Black capture d5, so I go for the exchange.
I didn't really understand the black move here, after exchanging knights, he could move the queen to capture my knight, but, as far as I learn, moving the queen so early is not adviced. So, I tried to go close to the "Happy garden" game. The happy garden (an Italian grandmaster used to call it "Giardino felice" consist into putting the bishops in f4 and c4, two pawns in d4 and e4 and two knights in c3 and f3, then castle. This is what I was trying to achieve here, instead of exchanging knights.
Of course, black wants to protect d5, so nothing special here.
Just in case, I pin the bishop. Black protects the knight in 3 ways.
Still trying to recreate the "Happy garden" and develop another light piece. For sure, my next moves will be d4 and Bf4.
Black is pinning my knight. I didn't care too much, because I can eventually respond to the change with the pawn in b2 without creating a situation of two pawns in front of each other
As announced, that was my move. I made a mistake and I recognised it too late.
I'm protecting the queen now, and I thought a central position could be the best solution. Plus, I'm attacking the knight is f4.
The damage is done, I lost a bishop, so I castle. As I said, in case of exchanging my knight for your bishop, I won't have two pawns in front of each other, so:
I need to protect my queen now:
Qe5 seems to be good in case of a future attack of the g7 pawn.
Exchanging the bishops.
And now capturing the g7 pawn, attacking the rook. Black is checking me.
Forced moved for me. Black protects his rook.
The reason for this move was to pin the black knight. The idea was to capture the knight and then pin (and capture) the queen. The plan B was to move the d pawn in the future and then kd4, capturing the knight.
The plan worked fine, the queen is now pinned:
The queen is pinned and the rook is protected by the knight. Black here can only prevent to lose more points than needed, so he captures my rook.
Not capturing the queen would be stupid here.
After that (capture a queen to a stronger opponent is always great, now we need to move on), the queen captures the unprotected h pawn. I can see a checkmate in 1 if Rxe1, so there are two ways to prevent this: give the king an exit way, like h2 or g2, or protecting that cell. Moving one of that 2 pawns means losing a knight, so:
The knights protects e1 while I'm giving the king an exit way.
The rook is attacking my queen, so I need to move it. I thought that Qf5 could have been a good move to pin the knight, too. Another idea was Qc2 and then, if the black plays c5, capturing it with dxc5, then kxc5 and the knight is pinned. That grandmaster in Italy, back in the summer 2000, told me that pinning is usually a good thing to do.
I play Qf5 as explained above.
Here, there are no captures available, apart from the stupid Qxf6 or Qxd7. The choice were between Qf4+ or h5. The pawn is protected by the queen and I can protect it with g4 in the future.
The knight is protecting d4. If I move the knight to attack (in two moves) the h rook, the pawn in d4 is unprotected. I can choose now between Nh4 (to attack the h rook later), Qxf6 or g4. I went for Nh4 to attack the rook later. I don't understand black's move Nd5 (why didn't he capture the pawn?)
As announced, I attack the rook. In that area, I'm everything is protected. If I move my knight to f4, in case of exchange, I will go for Qxf4 and attack the rook at the same time.
The black refused the exchange, so I go for it:
Now, back to the original plan to protect h5:
Now, what should I do? Apart from a2, who is defending the two pawns on the left side and the d pawn who is blocked, the f pawn is unprotected. Qf3 could have been good, but, at the same time, I wanted to move the king away from the corner (the queen leaves its place, then pawn exchange, rook captures pawn and check). So Kg2 is a good move for me. The Italian grandmaster told me that, in case of a 3 diagonal pawns, it's good to have the King attack outside the triangle. I never understood this thing to be honest, I can understand that it's good to have the king far from the corner when not so many pieces are left on the board.
The b pawn is uncovered now and it threatens to move my a pawn in the future. Qb1 is a good move. If then b4, a3, bxa3, Qa2 and eventually, get both pawns (or, at least, one).
As announced, the queen captures the pawn. In case of Rb8, Qc7+.
Protecting my pawn with Kf3.
Moving my king to f4, because is f5, Ke5, the rook leaves and the queen captures the other rook.
ps: it's only a pure coincidence if the last 26 moves of the game are the best recommandation by stockfish .