Overall the games were enjoyable, however this game stood out as an issue with the engine. A long gif, but notice the moves at the very end where it had three queens and refused to checkmate me.
https://lichess1.org/game/export/gif/M0pJAiyL.gif
These were bullet games where it was rated at 1700 and I am rated 1300ish...however I won a number of games against it. I never felt like I never had a chance.
38. Kxa5 Nxg2 39. Kb6 f5 40. h4 f4 41. h5 gxh5 42. Kc7 f3 43. Kd6 f2 44. Ke7 f1=Q 45. Ke8 Qe1+ 46. Kd7 h4 47. Kd6 h3 48. Kd5 h2 49. Kd4 h1=Q 50. Kd5 h5 51. Kd6 h4 52. Kd7 h3 53. Kd8 h2 54. Kd7 Qhg1 55. Kd6 h1=Q 56. Kd5 Ne3+ 57. Kd6 Nf5+ 58. Kd7 Ng7 59. Kc7 Qd1 60. Kc8 Qc1+ 61. Kd7 Qgd1+ 62. Ke7 Qhe1+ 63. Kf6 Nh5+ 64. Kg6 Nf4+ 65. Kf5 Nh3 66. Kf6 Nf2 67. Kg6 Kf8 68. Kf6 Ke8 69. Kg6 Kd8 70. Kg7 Kc8 71. Kg8 Kb8 72. Kg7 Ka8 73. Kg8 Ka7 74. Kg7 Ka6 75. Kg8 Ka5 76. Kg7 Ka4 77. Kg6 Kb3 78. Kg7 Ka2 79. Kg8 Ka1 80. Kg7 Ka2 81. Kg6 Ka1 82. Kg7 Ka2 { The game is a draw. } 1/2-1/2
These were bullet games where it was rated at 1700 and I am rated 1300ish...however I won a number of games against it. I never felt like I never had a chance.