Interested to know if you think black was using an engine or I am being paranoid

[Event "Rated Blitz game"]
[Site "lichess.org/p77NJShS"]
[Date "2020.05.25"]
[Round "-"]
[White "c0mptonmackenzie"]
[Black "bricruz_007"]
[Result "0-1"]
[UTCDate "2020.05.25"]
[UTCTime "07:39:12"]
[WhiteElo "1687"]
[BlackElo "1730"]
[WhiteRatingDiff "-5"]
[BlackRatingDiff "+5"]
[Variant "Standard"]
[TimeControl "180+0"]
[ECO "B34"]
[Opening "Sicilian Defense: Accelerated Dragon"]
[Termination "Normal"]
[Annotator "lichess.org"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 g6 { B34 Sicilian Defense: Accelerated Dragon } 5. f4 Bg7 6. Nc3 Nc6 7. Bb5 Bd7 8. Be3 a6 9. Bc4 Nf6 10. Qd3 Ng4 11. Bxf7+ Kxf7 12. Nxc6 Bxc6 13. O-O Nxe3 14. Qxe3 Rf8 15. f5 gxf5 16. Rxf5+ Kg8 17. Rg5 Kh8 18. Rd1 Bh6 19. Qd4+ e5 20. Rxe5 dxe5 21. Qxe5+ Bg7 22. Qh5 Qb6+ 23. Kh1 Qf2 24. Nd5 Qf1+ { White resigns. } 0-1

You played badly 10 Qd3 and 11 Bxf7+ hand over the game.

0 inaccuracies, mistakes, and blunders is just ridiculous. 10 centipawn loss? He probably is cheating.

With 11 Bxf7+ white hands over a piece and the game. It is hard for black to make any inaccuracies after that.

If he took about 8 seconds for each move (even in the opening), then he is most probably a cheater.

#5
Time use is irregular.
1 s for 5...Bg7
16 s for 8...a6
Not even time use indicates cheating.
Anyway, it is no valid practice to discuss alleged cheating in the forum.
If the original poster believes he was cheated, then he should report and await the official verdict.
I expect it to be negative.
This thread were better closed.

White blundered everything away without creating any threat. Black would have won the same way with or without assistance.

@tpr #6:

Sure. You are absolutely right.

But one thing comes into my mind:

How to cheat in a 3 + 0 Blitz game?

This needs some effort and knowledge.

I would make it so with Perl and it’s module WWW::Mechanize:

1. Faking a client
2. Connecting it to some engine
3 . Writing a test suite
4. Building in some clever delay
# Criminal energy part starts here
5. Creating different accounts

Some skills are needed.

But all this doesn’t make sense.

Why should one do such a crap?

Wasting so much time.

OK, some might say: «For the money»

But these games aren’t played for the money.

#8
There are known cases of cheating in 3+0.
Maybe some weak players take some pleasure in defeating strong players with an engine despite no money being involved.
Even in amateur cycling with no money involved people are known to take forbidden and harmful substances to enhance their performance.

Anyway this does not seem the case here.
It is rather a case of "I lost horribly, so my opponent must have cheated.

[Event "Rated Blitz game"]
[Site "lichess.org/cUfAHWsp"]
[Date "2020.05.25"]
[Round "-"]
[White "kaissaridet"]
[Black "bricruz_007"]
[Result "1-0"]
[UTCDate "2020.05.25"]
[UTCTime "07:45:19"]
[WhiteElo "1783"]
[BlackElo "1735"]
[WhiteRatingDiff "+5"]
[BlackRatingDiff "-5"]
[Variant "Standard"]
[TimeControl "180+0"]
[ECO "D04"]
[Opening "Queen's Pawn Game: Colle System"]
[Termination "Normal"]
[Annotator "lichess.org"]

1. d4 Nf6 2. Nf3 d5 3. e3 { D04 Queen's Pawn Game: Colle System } c5 4. Bd3 Nc6 5. b3 e6?! { (-0.44 → 0.30) Inaccuracy. cxd4 was best. } (5... cxd4 6. exd4 Bg4 7. Bb2 e6 8. O-O Bd6 9. h3 Bh5 10. Be2) 6. c3 cxd4 7. exd4 Bd6 8. Bb2?! { (0.45 → -0.20) Inaccuracy. Qe2 was best. } (8. Qe2 O-O 9. O-O b6 10. Nbd2 Bb7 11. Re1 Rc8 12. Ne5 Be7 13. Bb2 Nxe5 14. dxe5 Nd7) 8... O-O 9. Nbd2 h6?! { (-0.38 → 0.42) Inaccuracy. e5 was best. } (9... e5) 10. h3?! { (0.42 → -0.34) Inaccuracy. O-O was best. } (10. O-O Re8 11. Re1 e5 12. dxe5 Nxe5 13. Nxe5 Bxe5 14. h3 Qa5 15. Qc2 Bd7 16. Nf3 Bd6) 10... Bc7?! { (-0.34 → 0.66) Inaccuracy. Nh5 was best. } (10... Nh5) 11. a4? { (0.66 → -0.37) Mistake. O-O was best. } (11. O-O Nh5 12. Re1 Nf4 13. Bf1 a5 14. g3 Ng6 15. Rc1 Bd7 16. c4 Re8 17. Bd3 a4) 11... a6?! { (-0.37 → 0.57) Inaccuracy. Nh5 was best. } (11... Nh5) 12. b4?! { (0.57 → -0.39) Inaccuracy. O-O was best. } (12. O-O) 12... Qd6?! { (-0.39 → 0.54) Inaccuracy. e5 was best. } (12... e5 13. dxe5 Nh5 14. O-O Nf4 15. Bc2 Re8 16. Re1 Nxe5 17. c4 Nc6 18. Rxe8+ Qxe8 19. cxd5) 13. b5 axb5 14. axb5 Rxa1 15. Bxa1?? { (0.69 → -0.98) Blunder. Qxa1 was best. } (15. Qxa1 Ne7 16. O-O Qd8 17. Re1 Re8 18. Ne5 Nf5 19. Qa7 Nd7 20. Ndf3 Nxe5 21. Nxe5 b6) 15... Ne7?! { (-0.98 → 0.00) Inaccuracy. e5 was best. } (15... e5 16. bxc6 e4 17. Bxe4 dxe4 18. Ne5 bxc6 19. O-O c5 20. Qc2 Bb7 21. Rb1 Ra8 22. Ndc4) 16. Nb3?! { (0.00 → -0.88) Inaccuracy. O-O was best. } (16. O-O Bd7 17. Qa4 Rc8 18. c4 dxc4 19. Nxc4 Qd5 20. Ne3 Qd6) 16... b6 17. Qe2 Bd7 18. Bb2 Nf5 19. Ne5?! { (-0.33 → -1.19) Inaccuracy. g4 was best. } (19. g4 Ne7 20. Ne5 Ra8 21. h4 Ne4 22. g5 Nf5 23. gxh6 Nxh6 24. Rg1 Nf5 25. Bxe4 dxe4) 19... Re8?? { (-1.19 → 0.44) Blunder. Nxd4 was best. } (19... Nxd4 20. cxd4 Qb4+ 21. Qd2 Qxb3 22. Nxd7 Nxd7 23. Ke2 Ra8 24. Rc1 Bd6 25. Qc2 Qxc2+ 26. Rxc2) 20. Nxd7? { (0.44 → -0.92) Mistake. O-O was best. } (20. O-O) 20... Nxd7?? { (-0.92 → 3.73) Blunder. Qxd7 was best. } (20... Qxd7) 21. O-O?? { (3.73 → Mate in 1) Checkmate is now unavoidable. Bxf5 was best. } (21. Bxf5 Nf6) 21... g6?? { (Mate in 1 → -2.68) Lost forced checkmate sequence. Qh2# was best. } (21... Qh2#) 22. Ra1?? { (-2.68 → Mate in 2) Checkmate is now unavoidable. g3 was best. } (22. g3) 22... Ng7?? { (Mate in 2 → -0.37) Lost forced checkmate sequence. Qh2+ was best. } (22... Qh2+ 23. Kf1 Qh1#) 23. Ra7?? { (-0.37 → Mate in 2) Checkmate is now unavoidable. g3 was best. } (23. g3 e5 24. dxe5 Nxe5 25. Bc1 h5 26. Ra4 Nc4 27. Qf1 h4 28. Bf4 Ne5 29. Be2 Ne6) 23... e5?? { (Mate in 2 → 4.74) Lost forced checkmate sequence. Qh2+ was best. } (23... Qh2+ 24. Kf1 Qh1#) 24. Ba3 Qe6?! { (4.91 → 6.90) Inaccuracy. Qf6 was best. } (24... Qf6 25. Rxc7) 25. Rxc7 exd4 26. Qxe6 Rxe6 27. Rxd7 dxc3 28. Rc7 { Black resigns. } 1-0

[Event "Rated Blitz game"]
[Site "lichess.org/oMXlfqRp"]
[Date "2020.05.24"]
[Round "-"]
[White "Nikitoss"]
[Black "bricruz_007"]
[Result "0-1"]
[UTCDate "2020.05.24"]
[UTCTime "11:41:15"]
[WhiteElo "1725"]
[BlackElo "1719"]
[WhiteRatingDiff "-6"]
[BlackRatingDiff "+6"]
[Variant "Standard"]
[TimeControl "180+2"]
[ECO "A01"]
[Opening "Nimzo-Larsen Attack: Indian Variation"]
[Termination "Normal"]
[Annotator "lichess.org"]

1. b3 Nf6 { A01 Nimzo-Larsen Attack: Indian Variation } 2. Bb2 g6 3. d3?! { (0.09 → -0.53) Inaccuracy. d4 was best. } (3. d4 Bg7 4. e3 O-O 5. Nf3 b6 6. g3 Bb7 7. Bg2 e6) 3... Bg7 4. Nd2 O-O 5. e3 d5 6. Ne2?! { (-0.07 → -0.64) Inaccuracy. Ngf3 was best. } (6. Ngf3 c5 7. c4 Nc6 8. cxd5 Nxd5 9. Bxg7 Kxg7 10. Rc1 Ndb4) 6... c5 7. g3 Nc6 8. Bg2 e5 9. a3 Bf5 10. h3 Qd7 11. g4 Be6 12. Ng3 Ne8 13. O-O f5 14. g5?? { (-0.50 → -4.36) Blunder. gxf5 was best. } (14. gxf5) 14... f4 15. exf4? { (-3.68 → -6.00) Mistake. Nh1 was best. } (15. Nh1 Bxh3 16. Bxh3 Qxh3 17. Qf3 Qd7 18. e4 dxe4 19. Nxe4 Nd6 20. Kh2 Nxe4 21. dxe4 Qe7) 15... exf4 16. Ne2 Bxb2 { White resigns. } 0-1