Hi! Just played a game against the computer (level 3) and when the game was over, I wanted to analyze my game. A few times during the analysis, the score would drop to 0 after making a queen move (that I did, with white). And later with knight moves.
Now you might think that this was simply a bad move so that's why the score dropped, but it's not. This seemed to happen a few times during the game, to exactly 0. It happened first with queen moves, then twice with knight moves.
However, when checking the analysis, the computer says that if Bd7 (move 18) is played, the score is still 0. But after the computer played Bd7, the score went back up to +14.1.
So in no way should that queen move have affected the score that much. Especially not multiple times in a row. And the score dropped to exactly 0 a few times.
Is this a bug that other people have noticed before?
Here's a screenshot of the graph:
As you can see, the graph drops to 0 a few times for no apparent reason and it also counted all those drops as a blunder on my side.
Here's the PGN:
1. e4 e6 2. d4 Ne7 3. Nf3 Nbc6 4. d5 Nb4
5. a3 exd5 6. axb4 Nc6 7. exd5 Qe7+ 8. Be2 Qe4
9. dxc6 Bd6 10. cxd7+ Bxd7 11. Nc3 Qf5 12. Bd3 Qg4
13. O-O Kf8 14. h3 Qxb4 15. Re1 Bc6 16. Be4 Bd7
17. Qd5 Bc6 18. Qd1 Bd7 19. Qd5 Bc6 20. Qd1 Bd7
21. Ng5 h5 22. Qd5 Be8 23. Nh7+ Kg8 24. Ng5 c6
25. Qd3 g6 26. Ra4 Qc5 27. Be3 Qe5 28. h4 Bc7
29. Bd4 Qf4 30. Bxh8 Kxh8 31. Qd4+ Be5 32. Qe3 Qh2+
33. Kf1 Qh1+ 34. Ke2 Qxh4 35. Bxc6 Qh2 36. Bxe8 Bg7
37. Bxf7 Qe5 38. Nge4 Qf5 39. Ng5 Qe5 40. Re4 Qd6
41. Re8+ Rxe8 42. Qxe8+ Qf8 43. Qxf8+ Bxf8 44. Bxg6 Bb4
45. Rd1 Be7 46. Rd7 Bxg5 47. Rxb7 a6 48. Nd5 h4
49. c4 Bd8 50. c5 Ba5 51. c6 Bd8 52. c7 Bxc7
53. Rxc7 h3 54. gxh3 Kg8 55. Ke3 Kh8 56. Ke4 Kg8
57. Kf5 Kf8 58. Ke6 Kg8 59. Kf6 a5 60. Bf5 a4
61. Kg6 a3 62. Rc8#
The first time it happened was on move 18 so you can check for yourself if you want.
Now you might think that this was simply a bad move so that's why the score dropped, but it's not. This seemed to happen a few times during the game, to exactly 0. It happened first with queen moves, then twice with knight moves.
However, when checking the analysis, the computer says that if Bd7 (move 18) is played, the score is still 0. But after the computer played Bd7, the score went back up to +14.1.
So in no way should that queen move have affected the score that much. Especially not multiple times in a row. And the score dropped to exactly 0 a few times.
Is this a bug that other people have noticed before?
Here's a screenshot of the graph:
As you can see, the graph drops to 0 a few times for no apparent reason and it also counted all those drops as a blunder on my side.
Here's the PGN:
1. e4 e6 2. d4 Ne7 3. Nf3 Nbc6 4. d5 Nb4
5. a3 exd5 6. axb4 Nc6 7. exd5 Qe7+ 8. Be2 Qe4
9. dxc6 Bd6 10. cxd7+ Bxd7 11. Nc3 Qf5 12. Bd3 Qg4
13. O-O Kf8 14. h3 Qxb4 15. Re1 Bc6 16. Be4 Bd7
17. Qd5 Bc6 18. Qd1 Bd7 19. Qd5 Bc6 20. Qd1 Bd7
21. Ng5 h5 22. Qd5 Be8 23. Nh7+ Kg8 24. Ng5 c6
25. Qd3 g6 26. Ra4 Qc5 27. Be3 Qe5 28. h4 Bc7
29. Bd4 Qf4 30. Bxh8 Kxh8 31. Qd4+ Be5 32. Qe3 Qh2+
33. Kf1 Qh1+ 34. Ke2 Qxh4 35. Bxc6 Qh2 36. Bxe8 Bg7
37. Bxf7 Qe5 38. Nge4 Qf5 39. Ng5 Qe5 40. Re4 Qd6
41. Re8+ Rxe8 42. Qxe8+ Qf8 43. Qxf8+ Bxf8 44. Bxg6 Bb4
45. Rd1 Be7 46. Rd7 Bxg5 47. Rxb7 a6 48. Nd5 h4
49. c4 Bd8 50. c5 Ba5 51. c6 Bd8 52. c7 Bxc7
53. Rxc7 h3 54. gxh3 Kg8 55. Ke3 Kh8 56. Ke4 Kg8
57. Kf5 Kf8 58. Ke6 Kg8 59. Kf6 a5 60. Bf5 a4
61. Kg6 a3 62. Rc8#
The first time it happened was on move 18 so you can check for yourself if you want.