Why does Rubichess -2.1 play two losing moves starting with Nxd4 ?

[Chessqueen]

Komodo seems a good engine and you even found a good binary of it. So I can only repeat my advise: Leave this shitty Rubi engine. It seems completely broken.

True. I would suggest avoiding the entire suite of OpenBench engines to be safe.

I believe that RubiChess 2.1SSSE3 learnt after losing twice with the same opening I decided to use the same 6 moves opening for the 3rd time this time versus Komodo 9.0.2-64bit to see if it avoid taking 7....Nxd4? and it did it chose 7....Bb4+ which is not a blunder

[pgn][Event "Computer chess game"]
[Site "MININT-UB2PIMJ"]
[Date "2021.07.30"]
[Round "?"]
[White "Komodo-9.0.2-64bit"]
[Black "RubiChess-2.1-SSSE3"]
[Result "1/2"]
[BlackElo "3300"]
[ECO "B22"]
[Opening "Sicilian"]
[Time "21:14:59"]
[Variation "Alapin, 2...Nc6 3.Nf3"]
[WhiteElo "3300"]
[TimeControl "600+3"]
[Termination "normal"]
[PlyCount "207"]
[WhiteType "program"]
[BlackType "program"]

1. e4 c5 2. c3 Nc6 3. Nf3 e6 4. d4 cxd4 5. cxd4 d5 6. Nc3 dxe4 7. Nxe4 Bb4+
8. Nc3 Nf6 9. Bd3 h6 10. O-O O-O 11. Bf4 Bd6 12. Be5 Be7 13. a3 Qb6 14. Bf4
Nd5 15. Be3 Bf6 16. Qe2 Rd8 17. Rad1 Nxe3 18. fxe3 e5 19. d5 Ne7 20. Rf2
Nf5 21. Bxf5 Bxf5 22. Nh4 Bxh4 23. Rxf5 Rac8 24. Rff1 Bg5 25. Rd3 Be7 26.
Kh1 Qa6 27. e4 Rd6 28. h3 Rb6 29. Rfd1 Rf6 30. Qg4 Rc4 31. Kh2 Bd6 32. R3d2
g6 33. Qe2 h5 34. Qd3 h4 35. Rc2 Kg7 36. Re1 Rf4 37. Rce2 Rc5 38. Qd2 Qc4
39. Re3 Rc7 40. Rd1 Rc8 41. b4 Qa6 42. Ne2 Rf6 43. Nc1 Qa4 44. Nb3 b6 45.
Rc1 Rxc1 46. Qxc1 a5 47. bxa5 bxa5 48. Nd2 Qb5 49. Qc3 Rf2 50. Kg1 Re2 51.
Qd3 Qxd3 52. Rxd3 Re1+ 53. Kf2 Rc1 54. Ke2 a4 55. g3 hxg3 56. Rxg3 Bc7 57.
Rd3 Bd8 58. Nf3 f6 59. h4 Bb6 60. Rd2 Ra1 61. Rb2 Bc5 62. Rb7+ Kf8 63. Rb8+
Ke7 64. Rb7+ Ke8 65. Rb8+ Ke7 66. Rb7+ Kd8 67. Rf7 Ra2+ 68. Kd1 Be7 69. d6
Bxd6 70. Rxf6 Kc7 71. Rf7+ Kc8 72. Rf6 Bc7 73. Rxg6 Rxa3 74. Rf6 Rc3 75.
Nd2 a3 76. Ra6 Kb7 77. Ra4 Bd6 78. Nc4 Kc6 79. Nxd6 Kxd6 80. Ra5 Rh3 81. h5
Rxh5 82. Rxa3 Rh2 83. Rd3+ Ke6 84. Rg3 Rh4 85. Re3 Kf6 86. Rf3+ Kg6 87.
Rg3+ Kf6 88. Rf3+ Kg6 89. Rg3+ Kf7 90. Rf3+ Ke7 91. Re3 Kd6 92. Rd3+ Kc6
93. Rc3+ Kb5 94. Ke2 Rxe4+ 95. Kf3 Re1 96. Rc7 Rf1+ 97. Ke4 Re1+ 98. Kd5 e4
99. Rb7+ Ka5 100. Kd4 Ka4 101. Re7 Kb3 102. Re8 Kc2 103. Rxe4 Rxe4+ 104.
Kxe4 {Insufficient material} 1-0[/pgn]

[AndrewGrant]

Komodo seems a good engine and you even found a good binary of it. So I can only repeat my advise: Leave this shitty Rubi engine. It seems completely broken.

True. I would suggest avoiding the entire suite of OpenBench engines to be safe.

I believe that RubiChess 2.1SSSE3 learnt after losing twice with the same opening I decided to use the same 6 moves opening for the 3rd time this time versus Komodo 9.0.2-64bit to see if it avoid taking 7....Nxd4? and it did it chose 7....Bb4+ which is not a blunder

[pgn][Event "Computer chess game"]
[Site "MININT-UB2PIMJ"]
[Date "2021.07.30"]
[Round "?"]
[White "Komodo-9.0.2-64bit"]
[Black "RubiChess-2.1-SSSE3"]
[Result "1/2"]
[BlackElo "3300"]
[ECO "B22"]
[Opening "Sicilian"]
[Time "21:14:59"]
[Variation "Alapin, 2...Nc6 3.Nf3"]
[WhiteElo "3300"]
[TimeControl "600+3"]
[Termination "normal"]
[PlyCount "207"]
[WhiteType "program"]
[BlackType "program"]

1. e4 c5 2. c3 Nc6 3. Nf3 e6 4. d4 cxd4 5. cxd4 d5 6. Nc3 dxe4 7. Nxe4 Bb4+
8. Nc3 Nf6 9. Bd3 h6 10. O-O O-O 11. Bf4 Bd6 12. Be5 Be7 13. a3 Qb6 14. Bf4
Nd5 15. Be3 Bf6 16. Qe2 Rd8 17. Rad1 Nxe3 18. fxe3 e5 19. d5 Ne7 20. Rf2
Nf5 21. Bxf5 Bxf5 22. Nh4 Bxh4 23. Rxf5 Rac8 24. Rff1 Bg5 25. Rd3 Be7 26.
Kh1 Qa6 27. e4 Rd6 28. h3 Rb6 29. Rfd1 Rf6 30. Qg4 Rc4 31. Kh2 Bd6 32. R3d2
g6 33. Qe2 h5 34. Qd3 h4 35. Rc2 Kg7 36. Re1 Rf4 37. Rce2 Rc5 38. Qd2 Qc4
39. Re3 Rc7 40. Rd1 Rc8 41. b4 Qa6 42. Ne2 Rf6 43. Nc1 Qa4 44. Nb3 b6 45.
Rc1 Rxc1 46. Qxc1 a5 47. bxa5 bxa5 48. Nd2 Qb5 49. Qc3 Rf2 50. Kg1 Re2 51.
Qd3 Qxd3 52. Rxd3 Re1+ 53. Kf2 Rc1 54. Ke2 a4 55. g3 hxg3 56. Rxg3 Bc7 57.
Rd3 Bd8 58. Nf3 f6 59. h4 Bb6 60. Rd2 Ra1 61. Rb2 Bc5 62. Rb7+ Kf8 63. Rb8+
Ke7 64. Rb7+ Ke8 65. Rb8+ Ke7 66. Rb7+ Kd8 67. Rf7 Ra2+ 68. Kd1 Be7 69. d6
Bxd6 70. Rxf6 Kc7 71. Rf7+ Kc8 72. Rf6 Bc7 73. Rxg6 Rxa3 74. Rf6 Rc3 75.
Nd2 a3 76. Ra6 Kb7 77. Ra4 Bd6 78. Nc4 Kc6 79. Nxd6 Kxd6 80. Ra5 Rh3 81. h5
Rxh5 82. Rxa3 Rh2 83. Rd3+ Ke6 84. Rg3 Rh4 85. Re3 Kf6 86. Rf3+ Kg6 87.
Rg3+ Kf6 88. Rf3+ Kg6 89. Rg3+ Kf7 90. Rf3+ Ke7 91. Re3 Kd6 92. Rd3+ Kc6
93. Rc3+ Kb5 94. Ke2 Rxe4+ 95. Kf3 Re1 96. Rc7 Rf1+ 97. Ke4 Re1+ 98. Kd5 e4
99. Rb7+ Ka5 100. Kd4 Ka4 101. Re7 Kb3 102. Re8 Kc2 103. Rxe4 Rxe4+ 104.
Kxe4 {Insufficient material} 1-0[/pgn]

Well honestly I stopped reading your post after "learnt", since I can state unequivocally that Rubi did not train itself between your games.

[tmokonen]

I believe that I am not using the optimal RubiChess for my machine ==> Binary not optimal for this machine. Unused cpu features:popcnt avx2 bmi2. Please use correct binary for best performance. So where do I find the avx2 or bmi2 version ?

Fuck off with the troll posts already.

[RubiChess]

I believe that I am not using the optimal RubiChess for my machine ==> Binary not optimal for this machine. Unused cpu features:popcnt avx2 bmi2. Please use correct binary for best performance. So where do I find the avx2 or bmi2 version ?

Fuck off with the troll posts already.

I honestly believe that the queen is just intellectually handicapped.

[Damir]

Or maybe he is deliberately trying to raise other people's blood pressure...

[tmokonen]

Or maybe he is deliberately trying to raise other people's blood pressure...

Doctor said my blood pressure was fine

[Chessqueen]

Or maybe he is deliberately trying to raise other people's blood pressure...

I did, mission accomplished