Sargon 1978 UCI Available

[Chessqueen]

Here is another game where the same happened I set it to reach Depth 7 and sargon always took more time, but if you noticed that the other programs always stopped at the time lime since they reached a deeper Depth than sargon


[pgn][Event "Computer chess game"]
[Site "DESKTOP-OFQ3C0P"]
[Date "2021.02.08"]
[Round "?"]
[White "FracTalv1.0_x64"]
[Black "sargon-engineDepth7"]
[Result "*"]
[BlackElo "2000"]
[ECO "A00"]
[Opening "Trident Opening"]
[Time "12:50:46"]
[WhiteElo "2000"]
[TimeControl "0+120"]
[Termination "normal"]
[PlyCount "142"]
[WhiteType "program"]
[BlackType "program"]

1. g3 c5 2. Nc3 d5 3. d4 cxd4 4. Qxd4 Nf6 5. Be3 Nc6 6. Qa4 d4 7. O-O-O e5
8. f4 Ng4 9. Bxd4 exd4 10. Nf3 {(Ng1-f3 Ng4-f2 Rd1xd4 Bc8-d7 Rh1-g1 Bf8-c5
Rd4xd7 Ke8xd7) -3.03/9 125} Nf2 {(Ng4-f2 Rd1xd4 Bc8-d7 Rh1-g1 Nc6xd4 Qa4xd4
Nf2-h3) +2.75/7 217} 11. Rxd4 {(Rd1xd4 Bc8-d7 Rh1-g1 Bf8-c5 Rd4xd7 Qd8xd7)
-3.02/9 90} Bd7 {(Bc8-d7 Rh1-g1 Nc6xd4 Qa4xd4 Qd8-b6 Nc3-a4 Qb6xd4) +3.50/7
112} 12. Rg1 {(Rh1-g1 Bf8-c5 Rd4-d5 Nc6-e7 Qa4-c4 Ne7xd5 Nc3xd5) -3.17/8
89} Bc5 {(Bf8-c5 Rd4-d5 Nc6-e7 Qa4-c4 Bc5-e3+ Kc1-b1 Qd8-c8) +1.75/7 454}
13. Rd5 {(Rd4-d5 Nc6-e7 Qa4-c4 Bc5-e3+ Kc1-b1 Ne7xd5) -3.11/8 90} Ne7
{(Nc6-e7 Qa4-b3 Ne7xd5 Qb3xd5 Qd8-b6 Qd5-e5+ Ke8-f8) +3.12/7 593} 14. Rxd7
{(Rd5xd7 Qd8xd7 Qa4xd7+ Ke8xd7 e2-e4 Nf2xe4) -3.14/9 90} Qxd7 {(Qd8xd7
Qa4xd7+ Ke8xd7 Kc1-d2 Bc5-b6 Nf3-e5+ Kd7-e8) +2.25/7 41} 15. Qxd7+
{(Qa4xd7+ Ke8xd7 e2-e4 Nf2xe4 Nc3xe4 Bc5-e3+ Kc1-b1) -3.10/9 89} Kxd7
{(Ke8xd7 Kc1-b1 Nf2-g4 Bf1-h3 f7-f5 Rg1-d1+ Bc5-d6) +2.25/7 11} 16. e4
{(e2-e4 Nf2xe4 Nc3xe4 Bc5-e3+ Kc1-b1 Be3xg1 Bf1-b5+) -3.08/8 89} f6 {(f7-f6
Bf1-b5+ Kd7-c7 Rg1-e1 Ra8-d8 Bb5-c4 Ne7-c6) +3.75/7 258} 17. e5 {(e4-e5
Nf2-g4 Bf1-b5+ Kd7-c7 Rg1-e1 a7-a6 Bb5-c4) -2.75/8 90} fxe5 {(f6xe5 Bf1-b5+
Kd7-c7 f4xe5 Rh8-f8 Bb5-e2 Ra8-d8) +3.75/7 177} 18. fxe5 {(f4xe5 Ne7-c6
Bf1-c4 Nf2-d3+ c2xd3 Bc5-e3+ Kc1-c2 Be3xg1) -2.49/9 90} Rhf8 {(Rh8-f8
Bf1-b5+ Ne7-c6 e5-e6+ Kd7xe6 Nf3-g5+ Ke6-f5) +4.25/7 169} 19. Bg2 {(Bf1-g2
Bc5-e3+ Kc1-b1 Kd7-e6 Rg1-e1 Ne7-f5 a2-a3) -2.35/8 90} Be3+ {(Bc5-e3+
Kc1-b1 Ne7-f5 Bg2-f1 Nf5-d4 Nf3xd4 Be3xd4) +4.25/7 708} 20. Kb1 {(Kc1-b1
Kd7-e6 Rg1-e1 Ne7-f5 Bg2-f1 Rf8-c8 Bf1-b5 Nf2-g4) -2.30/9 89} Nf5 {(Ne7-f5
Rg1-e1 Ra8-c8 Nc3-d5 Be3-b6 Nd5xb6+ a7xb6) +3.75/7 315} 21. Re1 {(Rg1-e1
Ra8-e8 Nc3-d5 Be3-c5 Nf3-g5 h7-h6) -2.25/8 89} Rac8 {(Ra8-c8 Nf3-h4 Be3-d2
Re1-e2 Bd2xc3 Re2xf2 Nf5xh4) +3.00/7 292} 22. Nd5 {(Nc3-d5 Be3-c5 Nf3-g5
h7-h6 e5-e6+ Kd7-d6) -2.07/8 90} Bh6 {(Be3-h6 e5-e6+ Kd7-d6 Nf3-e5 Nf2-e4
Re1xe4 Kd6xd5) +4.25/7 340} 23. e6+ {(e5-e6+ Kd7-d6 Nf3-e5 Bh6-d2 Re1-e2
Nf5-d4 Re2xd2) -1.97/9 89} Kd6 {(Kd7-d6 Nf3-e5 Rc8-e8 Nd5-f4 Bh6xf4 g3xf4
Kd6-c7) +4.25/7 35} 24. Ne5 {(Nf3-e5 Bh6-d2 Re1-e2 Nf5-d4 Re2xd2) -1.97/8
89} Bd2 {(Bh6-d2 Re1-e2 Nf5-d4 Re2xd2 Kd6xe5 e6-e7 Rf8-f5) +3.75/7 164} 25.
Re2 {(Re1-e2 Nf5-d4 e6-e7 Nd4xe2 Ne5-c4+ Kd6-e6) -0.72/8 89} Nd4 {(Nf5-d4
Ne5-f7+ Rf8xf7 Re2xd2 Nd4xe6 Nd5-f6+ Nf2-d3) +1.00/7 229} 26. Nf7+
{(Ne5-f7+ Rf8xf7 Re2xd2 Nd4xe6 Nd5-f4+ Kd6-e7 Rd2xf2 Ke7-d6) -0.87/9 90}
Rxf7 {(Rf8xf7 Re2xd2 Nd4xe6 Nd5-b6+ Kd6-c7 Nb6xc8 Kc7xc8) +2.62/7 19} 27.
Rxd2 {(Re2xd2 Nd4xe6 Nd5-f4+ Kd6-e7 Rd2-e2 Rf7xf4 g3xf4) -0.74/9 90} Nxe6
{(Nd4xe6 Nd5-f4+ Kd6-e5 Rd2-e2+ Ke5-f5 Nf4xe6 Nf2-g4) +1.87/7 153} 28. Nb6+
{(Nd5-b6+ Kd6-c7 Nb6xc8 Kc7xc8 Bg2-d5 Kc8-c7 Bd5xe6 Nf2-e4) +0.85/9 90} Kc7
{(Kd6-c7 Nb6xc8 Kc7xc8 Bg2-d5 Kc8-d7 Bd5-f3+ Nf2-d3) -1.00/7 13} 29. Nxc8
{(Nb6xc8 Kc7xc8 Bg2-d5 Rf7-f6 Rd2xf2 Rf6xf2 Bd5xe6+) -0.97/9 89} Kxc8
{(Kc7xc8 Bg2-d5 Rf7-f6 Rd2xf2 Rf6xf2 Bd5xe6+ Kc8-c7) +1.75/7 72} 30. Bd5
{(Bg2-d5 Rf7-f6 Rd2xf2 Rf6xf2 Bd5xe6+ Kc8-c7) -1.92/9 89} Rf6 {(Rf7-f6
Rd2xf2 Rf6xf2 Bd5xe6+ Kc8-c7 Kb1-c1 Rf2xh2) +2.25/7 33} 31. Rxf2 {(Rd2xf2
Rf6xf2 Bd5xe6+ Kc8-c7 a2-a3 Rf2xh2) -2.02/9 89} Rxf2 {(Rf6xf2 Bd5xe6+
Kc8-c7 Kb1-c1 Rf2xh2 Be6-c4 Rh2-h3) +2.25/7 30} 32. Bxe6+ {(Bd5xe6+ Kc8-c7
Kb1-c1 Rf2xh2 g3-g4 Kc7-d6 Be6-c8 b7-b6 Bc8-f5 h7-h5) -2.58/11 90} Kc7
{(Kc8-c7 Kb1-c1 Rf2xh2 Be6-d5 Rh2-h5 c2-c4 Rh5-h6) +2.62/7 10} 33. Kc1
{(Kb1-c1 Rf2xh2 g3-g4 Kc7-d6 Be6-c8 Rh2-g2 a2-a4 Kd6-c7 Bc8-e6 g7-g6 a4-a5)
-2.50/11 90} Rxh2 {(Rf2xh2 Be6-d5 Rh2-e2 Bd5-c4 Re2-e3 Bc4-d3 g7-g6)
+2.87/7 32} 34. g4 {(g3-g4 Kc7-d6 Be6-c8 b7-b6 Bc8-b7 Rh2-f2 Bb7-e4 Rf2-f4
Be4xh7) -2.53/11 90} Kd6 {(Kc7-d6 Be6-f5 Kd6-e5 Kc1-d1 Rh2-h1+ Kd1-e2
g7-g6) +3.00/7 40} 35. Bc8 {(Be6-c8 b7-b6 Bc8-b7 Rh2-f2 Bb7-e4 Rf2-f4
Be4xh7) -2.53/10 89} Rh1+ {(Rh2-h1+ Kc1-d2 Rh1-h2+ Kd2-c3 Rh2-h3+ Kc3-b4
Kd6-c7) +3.25/7 25} 36. Kd2 Rh2+ {(Rh1-h2+ Kd2-c3 b7-b6 Bc8-b7 Rh2-h3+
Kc3-b4 Kd6-c7) +2.87/7 34} 37. Kd3 {(Kd2-d3 b7-b6 Bc8-b7 h7-h5 g4xh5 Rh2xh5
Bb7-f3) -2.25/10 90} b6 {(b7-b6 Bc8-b7 Kd6-e5 Bb7-c6 Rh2-h6 Bc6-b7 Ke5-f4)
+2.75/7 29} 38. Bb7 {(Bc8-b7 Rh2-h3+ Kd3-e4 h7-h5 g4xh5 Rh3xh5 Ke4-d3
Rh5-b5 Kd3-c3 Rb5-c5+) -2.28/10 90} Rh3+ {(Rh2-h3+ Kd3-e2 Rh3-h2+ Ke2-d3
Rh2-h3+ Kd3-c4 Kd6-c7) +2.87/7 27} 39. Ke4 {(Kd3-e4 h7-h5 g4xh5 Rh3xh5
Ke4-d3 Rh5-b5 Kd3-c3 Rb5-a5) -2.30/10 90} Rh2 {(Rh3-h2 Ke4-d3 Kd6-e5 Bb7-c6
Rh2-h6 Bc6-b7 Ke5-f4) +2.75/7 29} 40. Kd3 {(Ke4-d3 Rh2-h3+ Kd3-e4 Rh3-h4
Ke4-f3 h7-h5 g4xh5 Rh4xh5 Bb7-e4 Rh5-b5) -2.28/10 89} Ke5 {(Kd6-e5 Bb7-c6
Rh2-h6 Bc6-f3 Ke5-f4 Bf3-e2 b6-b5) +2.75/7 64} 41. Ba6 {(Bb7-a6 Rh2-h4
Ba6-c8 Rh4-h3+ Kd3-c4 h7-h5 g4xh5 Rh3xh5) -2.33/10 89} Kf4 {(Ke5-f4 Ba6-c8
Rh2-h3+ Kd3-d4 h7-h5 g4xh5 Rh3xh5) +2.75/7 27} 42. Bc8 {(Ba6-c8 Rh2-h6
Kd3-d2 Rh6-c6 Bc8-a6 Rc6-d6+ Ba6-d3 h7-h6 Kd2-c3) -3.45/11 89} Rh6 {(Rh2-h6
Bc8-f5 Rh6-h3+ Kd3-d4 h7-h5 Bf5-d3 h5xg4) +3.37/7 24} 43. Kd2 {(Kd3-d2
Rh6-c6 Bc8-b7 Rc6-d6+ Kd2-e2 Rd6-h6 Bb7-c8 Rh6-c6 Bc8-f5 h7-h5 b2-b4)
-3.52/11 89} Rc6 {(Rh6-c6 Bc8-a6 Kf4xg4 Ba6-d3 Rc6-h6 Bd3-e2+ Kg4-f5)
+3.50/7 26} 44. Ba6 {(Bc8-a6 Kf4xg4 Ba6-d3 Rc6-h6 Kd2-e3 Kg4-g5 a2-a3
Rh6-h2 Bd3-e4 Kg5-f6) -3.70/11 89} Kxg4 {(Kf4xg4 Ba6-d3 Rc6-d6 Kd2-c3
Rd6-h6 Bd3-e2+ Kg4-f5) +3.50/7 17} 45. Bd3 {(Ba6-d3 h7-h5 Kd2-e3 h5-h4
a2-a3 h4-h3 Ke3-d4 Rc6-c8) -3.82/10 90} g6 {(g7-g6 Bd3-e4 Rc6-c7 Kd2-e3
Rc7-c5 Ke3-d4 Rc5-a5) +3.75/7 35} 46. Ke3 {(Kd2-e3 Rc6-e6+ Bd3-e4 Kg4-g5
a2-a3 Re6-e5 Ke3-d4) -3.66/10 90} Re6+ {(Rc6-e6+ Bd3-e4 Kg4-g3 a2-a3 Re6-e7
Ke3-d4 Kg3-f4) +3.62/7 20} 47. Be4 {(Bd3-e4 Kg4-g5 c2-c4 Kg5-f6 Ke3-d4
Re6-e8 b2-b4 Kf6-e6) -3.73/11 90} Re7 {(Re6-e7 Ke3-d4 Kg4-f4 Be4-d5 Re7-d7
Kd4-c4 Kf4-e5) +3.50/7 14} 48. a3 {(a2-a3 Kg4-g5 c2-c4 Re7-d7 Be4-c6 Rd7-d8
Ke3-e4 Rd8-d2 b2-b4 Kg5-f6) -3.75/11 89} Kg5 {(Kg4-g5 Ke3-d4 Kg5-f4 Be4-d5
Re7-d7 Kd4-c4 Kf4-e5) +3.50/7 19} 49. a4 {(a3-a4 Re7-e8 b2-b4 Kg5-f6 Ke3-d4
Kf6-e6 Be4-d5+ Ke6-d6 Bd5-b3) -3.78/11 89} a6 {(a7-a6 Ke3-d4 Re7-d7+ Kd4-e5
Rd7-e7+ Ke5-d4 Kg5-f4) +3.62/7 20} 50. b4 {(b2-b4 Re7-c7 b4-b5 a6-a5 Be4-c6
Kg5-f6 Ke3-d4 g6-g5) -3.68/10 90} Kf6 {(Kg5-f6 Ke3-d4 Re7-d7+ Kd4-c3 Rd7-e7
Kc3-d4 a6-a5) +3.62/7 27} 51. c4 {(c2-c4 Kf6-e5 c4-c5 b6xc5 b4xc5 Re7-d7
a4-a5 Rd7-d4 Be4-b7 Rd4-a4) -3.37/11 90} Ke5 {(Kf6-e5 a4-a5 b6xa5 b4xa5
Ke5-d6 Ke3-d4 Re7-e5) +3.50/7 32} 52. c5 {(c4-c5 b6xc5 b4xc5 Re7-f7 c5-c6
Rf7-f1 Be4-d3 Rf1-e1+ Ke3-f3) -3.35/11 89} bxc5 {(b6xc5 b4xc5 Re7-c7 c5-c6
Rc7-e7 Be4-f3 Ke5-d6+ Ke3-d4) +3.62/7 9} 53. bxc5 {(b4xc5 a6-a5 c5-c6
Re7-e8 Be4-f3 Ke5-d6+ Ke3-f4 Re8-b8 Kf4-g5) -3.58/12 89} Rd7 {(Re7-d7
Be4-d3 Rd7-d4 a4-a5 Rd4-a4 Bd3xa6 Ra4xa5) +4.12/7 10} 54. c6 {(c5-c6 Rd7-c7
Be4-f3 a6-a5 Ke3-d3 Rc7-c8 Kd3-c2 Ke5-d6 Bf3-g2) -3.56/12 90} Rd8 {(Rd7-d8
Be4-d3 Ke5-d6 Bd3-e4 Kd6-c5 Ke3-f2 Rd8-d4) +4.12/7 8} 55. Bd3 {(Be4-d3
Rd8-c8 Bd3xa6 Rc8xc6 Ba6-d3 Rc6-c5 Ke3-d2 Ke5-d4) -3.63/12 89} a5 {(a6-a5
Bd3-c4 Rd8-d4 Bc4-b5 Rd4-f4 Ke3-d2 Rf4-f7) +3.75/7 15} 56. Ba6 {(Bd3-a6
Ke5-d6 Ba6-b5 Kd6-d5 Ke3-d3 g6-g5 Kd3-d2 g5-g4 c6-c7) -3.40/12 89} Rd4
{(Rd8-d4 Ba6-b5 Rd4-d8 Bb5-d3 Rd8-d4 Bd3-b5 Rd4-d8) +3.75/7 14} 57. c7
{(c6-c7 Rd4-e4+ Ke3-d2 Re4xa4 c7-c8Q Ra4-a2+ Kd2-e3 Ke5-d6 Qc8-b8+ Kd6-c6
Ba6-b5+ Kc6-c5) +3.93/12 89} Re4+ {(Rd4-e4+ Ke3-d2 Re4-d4+ Kd2-c3 Rd4-d1
c7-c8Q Rd1-c1+ Kc3-b2) -2.25/7 8} 58. Kd2 {(Ke3-d2 Re4xa4 c7-c8Q Ra4-b4
Qc8-c5+ Ke5-f6 Kd2-e3 Rb4-h4 Qc5-d6+) +4.11/12 90} Rd4+ {(Re4-d4+ Kd2-c2
Rd4xa4 c7-c8Q Ra4-a2+ Kc2-b3 Ra2-a1) -4.75/7 12} 59. Bd3 {(Ba6-d3 Rd4xa4
c7-c8Q Ra4-a2+ Kd2-e3 Ke5-d6) +4.19/11 90} Kd6 {(Ke5-d6 c7-c8Q Rd4xa4
Qc8-a6+ Kd6-c7 Qa6-a7+ Kc7-d8) -5.75/7 7} 60. c8=Q {(c7-c8Q Rd4-d5 Qc8-a6+
Kd6-e7 Qa6-a7+ Rd5-d7 Qa7xa5 Ke7-d6) +5.81/11 89} Rd5 {(Rd4-d5 Qc8-g8
Rd5-h5 Qg8-d8+ Kd6-c5 Qd8xa5+ Kc5-d6) -6.25/7 24} 61. Ke3 {(Kd2-e3 Rd5-e5+
Bd3-e4 Re5-h5 Qc8-d8+ Kd6-e6 Ke3-d4 Rh5-h2) +5.88/10 89} Re5+ {(Rd5-e5+
Bd3-e4 Kd6-e7 Ke3-f4 Re5-h5 Qc8-c3 Ke7-d6) -5.75/7 13} 62. Be4 {(Bd3-e4
Re5-e7 Qc8-d8+ Re7-d7 Qd8-f6+) +6.13/10 90} Ke7 {(Kd6-e7 Ke3-d3 Re5-h5
Be4-f3 Rh5-h4 Qc8-c7+ Ke7-f8) -6.25/7 14} 63. Qc7+ {(Qc8-c7+ Ke7-e6 Qc7xh7
Re5-g5 Qh7-c7 Rg5-g1 Qc7xa5) +7.41/9 90} Kf6 {(Ke7-f6 Qc7xh7 Kf6-g5 Qh7-f7
Kg5-h5 Qf7xg6+ Kh5-h4) -7.75/7 5} 64. Qxh7 {(Qc7xh7 Re5-e8 Qh7xg6+ Kf6-e7
Qg6-h5 Ke7-d7 Qh5xa5) +9.05/10 89} Re7 {(Re5-e7 Qh7xg6+ Kf6-e5 Qg6-g5+
Ke5-d6 Qg5-d5+ Kd6-c7) -8.75/7 13} 65. Qxg6+ {(Qh7xg6+ Kf6-e5 Qg6-c6 Re7-f7
Qc6-c5+ Ke5-f6) +9.20/10 90} Ke5 {(Kf6-e5 Qg6-g5+ Ke5-d6 Ke3-d4 Kd6-d7
Qg5-f5+ Kd7-e8) -8.75/7 4} 66. Qf5+ {(Qg6-f5+ Ke5-d6 Qf5-d5+ Kd6-c7
Qd5xa5+) +9.23/9 90} Kd6 {(Ke5-d6 Ke3-f4 Re7-e8 Qf5-d5+ Kd6-c7 Qd5-c5+
Kc7-d7) -8.75/7 4} 67. Qf8 {(Qf5-f8 Kd6-e6 Be4-f5+ Ke6-e5 Qf8xe7+ Ke5xf5)
+10.58/9 90} Kd7 {(Kd6-d7 Ke3-d4 Re7xe4+ Kd4xe4 Kd7-c6 Qf8-d8 Kc6-b7)
-10.75/7 6} 68. Kd4 {(Ke3-d4 Re7xe4+ Kd4xe4 Kd7-c6 Qf8-b8) +10.99/9 90}
Rxe4+ {(Re7xe4+ Kd4xe4 Kd7-c6 Qf8-f5 Kc6-b6 Qf5-b5+ Kb6-c7) -10.75/7 18}
69. Kxe4 {(Kd4xe4 Kd7-e6 Qf8-d8 Ke6-f7 Ke4-e5 Kf7-g6 Qd8-h4 Kg6-f7 Qh4-g5
Kf7-f8 Ke5-f6) +M500/13 90} Kc6 {(Kd7-c6 Qf8-f5 Kc6-b6 Qf5-b5+ Kb6-c7
Qb5-c5+ Kc7-d7) -10.75/7 3} 70. Qe7 {(Qf8-e7 Kc6-b6 Qe7-d6+ Kb6-a7 Qd6-c6
Ka7-b8 Qc6-d7 Kb8-a8 Ke4-d3 Ka8-b8 Qd7-c6 Kb8-a7 Kd3-c4) +M500/13 90} Kb6
{(Kc6-b6 Qe7-d6+ Kb6-b7 Qd6-c5 Kb7-a6 Qc5-b5+ Ka6-a7) -10.75/7 2} 71. Qd6+
{(Qe7-d6+ Kb6-a7 Qd6-c6 Ka7-b8 Ke4-d5 Kb8-a7 Qc6-c8 Ka7-b6 Kd5-d6 Kb6-a7
Kd6-e7) +M500/14 89} Kb7 {(Kb6-b7 Qd6-c5 Kb7-a6 Qc5-b5+ Ka6-a7 Ke4-f3
Ka7-a8) -10.75/7 5 Black resigns} *[/pgn]

[Bill Forster]

Chessqueen likes to use the Sargon 1978's "FixedDepth" parameter to set a fixed depth. I implemented this for compatibility with (and harmony with /respect to) the original Z80 Sargon user interface whereby the user was asked to select the "Level" (exactly the same as depth in this context) before starting the game. The whole game would proceed at that level. If FixedDepth is set to a non-zero value, then the Sargon 1978 UCI engine will operate in a similar way, always calculating to the assigned depth, taking no notice of the time control information provided by Arena, or other GUI (it will happily just lose on time).

(In V1.01 there are some slight adjustments to this policy, Sargon quickly probes at levels 1,2 and 3 [almost instantaneous] in case there's an immediate mate available.)

Normally FixedDepth should be set to 0 (the default). Then Sargon 1978's UCI wrapper will manage time, using low depth if there's not much time left.

Incidentally, Z80 Sargon 1978 only allowed levels 1-6, and level 6 meant hours of calculation for every move. Setting level 6 with FixedDepth = 6 results in a comparatively speedy 15 secs or so per move using Sargon 1978 UCI, less on a fast machine. I constrain FixedDepth to a range of 1-20, but too much higher than 6 will get unbearably slow even on a fast machine. The time blows out exponentially as explained at length in my project documentation.

[Chessqueen]

Chessqueen likes to use the Sargon 1978's "FixedDepth" parameter to set a fixed depth. I implemented this for compatibility with (and harmony with /respect to) the original Z80 Sargon user interface whereby the user was asked to select the "Level" (exactly the same as depth in this context) before starting the game. The whole game would proceed at that level. If FixedDepth is set to a non-zero value, then the Sargon 1978 UCI engine will operate in a similar way, always calculating to the assigned depth, taking no notice of the time control information provided by Arena, or other GUI (it will happily just lose on time).

(In V1.01 there are some slight adjustments to this policy, Sargon quickly probes at levels 1,2 and 3 [almost instantaneous] in case there's an immediate mate available.)

Normally FixedDepth should be set to 0 (the default). Then Sargon 1978's UCI wrapper will manage time, using low depth if there's not much time left.

Incidentally, Z80 Sargon 1978 only allowed levels 1-6, and level 6 meant hours of calculation for every move. Setting level 6 with FixedDepth = 6 results in a comparatively speedy 15 secs or so per move using Sargon 1978 UCI, less on a fast machine. I constrain FixedDepth to a range of 1-20, but too much higher than 6 will get unbearably slow even on a fast machine. The time blows out exponentially as explained at length in my project documentation.

Thanks for the explanation, I did noticed in most of the games that I witness that is the case

sargon no longer lose to Tarrasch Toy

[Event "Computer chess game"]
[Site "DESKTOP-OFQ3C0P"]
[Date "2021.02.08"]
[Round "?"]
[White "Sargon-engine Depth6"]
[Black "TarraschToyEngineV0.906"]
[Result "1-0"]
[BlackElo "1480"]
[ECO "A03"]
[Opening "Bird Opening"]
[Time "20:36:09"]
[Variation "1...d5 2.Nf3 c5"]
[WhiteElo "????"]
[TimeControl "0+90"]
[Termination "normal"]
[PlyCount "75"]
[WhiteType "program"]
[BlackType "program"]

1. f4 d5 2. Nf3 c5 3. b3 Nc6 {(Nb8-c6 Nb1-c3 Ng8-f6) +0.17/3 0} 4. Ba3
{(Bc1-a3 Qd8-d6 Nb1-c3 Ng8-f6 g2-g3 e7-e5) -0.87/6 17} e6 {(e7-e6 Nb1-c3
Ng8-f6 e2-e3) +0.07/4 0} 5. e3 {(e2-e3 Ng8-f6 Bf1-d3 Qd8-a5 Ke1-f2 c5-c4)
0.00/6 22} Qc7 {(Qd8-c7 Nb1-c3 Ng8-f6) +0.35/3 0} 6. Bb5 {(Bf1-b5 Bc8-d7
Nb1-c3 Qc7-a5 Qd1-c1 d5-d4) +0.25/6 24} Nf6 {(Ng8-f6 Nb1-c3) +0.20/2 0} 7.
O-O {(O-O Bc8-d7 Nb1-c3 Qc7-a5 Qd1-c1 d5-d4) +0.25/6 30} Bd6 {(Bf8-d6
Nb1-c3 a7-a6 Bb5xc6+) +0.05/4 0} 8. Bb2 {(Ba3-b2 Bc8-d7 Bb2xf6 g7xf6 Nb1-c3
O-O) +0.37/6 32} O-O {(O-O Nb1-c3 e6-e5) +0.42/3 0} 9. Na3 {(Nb1-a3 Bc8-d7
Bb5xc6 Qc7xc6 Kg1-f2 c5-c4) -0.25/6 43} a6 {(a7-a6 Bb5-a4) +0.50/2 0} 10.
Bxc6 {(Bb5xc6 b7xc6 Kg1-f2 Bc8-b7 Bb2xf6 g7xf6) +0.25/6 26} bxc6 {(b7xc6
Qd1-e2 Bc8-b7) -0.02/3 0} 11. Be5 {(Bb2-e5 Bd6xe5 f4xe5 Nf6-g4 Nf3-g5
Ng4xe5) -0.25/6 24} Bxe5 {(Bd6xe5 Nf3xe5 Bc8-b7) +0.52/3 0} 12. Nxe5
{(Nf3xe5 a6-a5 Ra1-b1 Bc8-a6 d2-d3 d5-d4) -0.25/6 15} Qa5 {(Qc7-a5 Qd1-c1)
+0.07/2 0} 13. Qc1 {(Qd1-c1 Bc8-b7 Ra1-b1 Nf6-e4 Ne5-f3 Ne4-d6) 0.00/6 11}
Bb7 {(Bc8-b7 d2-d4 c5xd4) +0.17/3 0} 14. g4 {(g2-g4 Rf8-d8 Kg1-f2 Nf6-e4+
Kf2-e2 f7-f6) 0.00/6 22} Qc7 {(Qa5-c7 Qc1-b2) +0.17/2 0} 15. Kg2 {(Kg1-g2
Nf6-e4 d2-d3 Ne4-c3 Qc1-e1 Nc3-b5) +0.25/6 16} a5 {(a6-a5 Qc1-b2) +0.40/2
0} 16. Qe1 {(Qc1-e1 Bb7-a6 d2-d3 Rf8-b8 g4-g5 Nf6-d7) +0.25/6 29} Nd7
{(Nf6-d7 Ne5-d3 f7-f5) +0.62/3 0} 17. Nxd7 {(Ne5xd7 Qc7xd7 d2-d3 f7-f5
g4xf5 e6xf5) +0.37/6 16} Qxd7 {(Qc7xd7 Qe1-f2 f7-f5) +0.32/3 0} 18. d3
{(d2-d3 f7-f5 g4-g5 Kg8-f7 d3-d4 Qd7-d6) +0.25/6 21} d4 {(d5-d4 e3xd4
c5xd4) +0.47/3 0} 19. Nc4 {(Na3-c4 Qd7-d5+ Kg2-g3 d4xe3 Nc4-b6 Qd5-d4)
+1.00/6 12} f5 {(f7-f5 Qe1-e2) +0.05/2 0} 20. Nb6 {(Nc4-b6 Qd7-d6 Nb6xa8
Rf8xa8 e3xd4 c5xd4) +2.25/6 32} Qd6 {(Qd7-d6 Nb6xa8 Rf8xa8) -1.67/3 0} 21.
Nxa8 {(Nb6xa8 Rf8xa8 g4xf5 e6xf5 e3xd4 Qd6xd4) +2.75/6 15} Rxa8 {(Rf8xa8
e3xd4 c5xd4) -1.65/3 0} 22. gxf5 {(g4xf5 e6xf5 e3xd4 Qd6-d5+ Kg2-g3 Qd5xd4)
+2.75/6 15} exf5 {(e6xf5 e3xd4 Qd6xd4) -1.32/3 0} 23. exd4 {(e3xd4 c5xd4
Qe1-e5 c6-c5+ Kg2-g3 Qd6-g6+ Kg3-h4) +2.25/6 33} Qd5+ {(Qd6-d5+ Rf1-f3
c5xd4) -1.47/3 0} 24. Kg3 {(Kg2-g3 c5xd4 Qe1-e7 c6-c5 Rf1-f2 a5-a4) +2.00/6
4} cxd4 {(c5xd4 Qe1-e5 Ra8-f8) -1.67/3 0} 25. Qe2 {(Qe1-e2 c6-c5 Ra1-e1
Kg8-f7 Qe2-e7+ Kf7-g6) +2.62/6 15} c5 {(c6-c5 Qe2-h5 Ra8-c8) -1.70/3 0} 26.
Rae1 {(Ra1-e1 Qd5-c6 a2-a3 Qc6-g6+ Kg3-h3 Bb7-d5) +2.37/6 15} Rb8 {(Ra8-b8
Qe2-e6+) -1.65/2 0} 27. Rg1 {(Rf1-g1 g7-g6 Kg3-h4 Bb7-c6 Qe2-e5 Qd5xe5)
+1.50/6 24} Ra8 {(Rb8-a8 Qe2-e6+) -1.67/2 0} 28. Kh4 {(Kg3-h4 Qd5-d8+
Qe2-e7 Bb7-c6 Re1-e5 Bc6-d7) +3.12/6 15} Rb8 {(Ra8-b8 Qe2-h5) -1.67/2 0}
29. Qe5 {(Qe2-e5 Qd5xe5 Re1xe5 Rb8-c8 Re5-e7 Bb7-d5) +3.75/6 11} Qxe5
{(Qd5xe5 f4xe5) -2.55/2 0} 30. Rxe5 {(Re1xe5 Bb7-a6 Re5xf5 Rb8-c8 Rg1-g5
c5-c4) +4.00/6 3} Ra8 {(Rb8-a8 Re5xc5 Bb7-c8) -2.57/3 0} 31. Re7 {(Re5-e7
Bb7-d5 Rg1xg7+ Kg8-h8 Rg7xh7+ Kh8-g8) +4.75/6 9} Bc6 {(Bb7-c6 Rg1xg7+
Kg8-h8) -3.72/3 0} 32. Rgxg7+ {(Rg1xg7+ Kg8-h8 Rg7xh7+ Kh8-g8 Kh4-g5
Ra8-f8) +4.75/6 5} Kh8 {(Kg8-h8 Rg7xh7+ Kh8-g8 c2-c4) -4.05/4 0} 33. Rxh7+
{(Rg7xh7+ Kh8-g8 Kh4-g5 Ra8-e8 Rh7-g7+ Kg8-f8) +5.25/6 3} Kg8 {(Kh8-g8)
-3.90/2} 34. Kg5 {(Kh4-g5 Bc6-f3 Kg5xf5 Bf3-d1 Re7-g7+ Kg8-f8) +5.25/6 5}
Re8 {(Ra8-e8 Kg5xf5 Kg8-f8 Re7-c7) -5.07/4 0} 35. Reg7+ {(Re7-g7+ Kg8-f8
Kg5-f6 Bc6-d5 Rh7-h8+ Bd5-g8) +7.50/6 5} Kf8 {(Kg8-f8) -4.90/2} 36. Kf6
{(Kg5-f6 Re8-e6+ Kf6xe6 Bc6-e8 Ke6xf5 a5-a4) +10.75/6 9} Bd5 {(Bc6-d5
Rg7-f7+ Kf8-g8) -50.00/4 0} 37. Rh8+ {(Rh7-h8+ Bd5-g8 Rg7xg8+) +M2/3 0} Bg8
{(Bd5-g8) -6.87/2} 38. Rgxg8# 1-0

[Bill Forster]

I used Tarrasch Toy Engine when I was bringing up Sargon. I wrote Tarrasch Toy engine myself and I was not surprised that it outclassed Sargon in all my tests. It's actually a rather similar engine to Sargon (because I only really knew the basic ideas of Shannon etc. when I wrote it - i.e. primitive engine ideas, just like those employed by Sargon). So like Sargon TTE does a broad shallow search, with SOMA to try and reduce the impact of the shallow depth. Simple minimax with alpha-beta to speed things up. Alpha-Beta is way way simpler in Sargon incidentally. If I ever write another engine I will avoid the monstrosity that was alpha-beta in TTE. Although TTE is C++ and Sargon is assembler, TTE is likely still quicker at generating moves etc because it uses lookup tables, using memory Sargon could never afford. So they are comparable in many ways, BUT Sargon has an absolutely primitive, zero knowledge leaf evaluator, whereas I spent a bit of time teaching TTE my favourite nuggets of chess wisdom. So it can play endings quite well for example, using its king, fighting for passed pawns, bullying weak opponents. Things Sargon can only dream of.

So I was unsurprised that TTE is considerably stronger than Sargon. This game of yours seems weird to me, after 19.Nc4 Sargon threatens a knight fork, and TTE just allows it ??! I set TTE as a kibitzer and just allowing the knight fork in this position doesn't appear in the analysis at all.

I have stepped through other games where you have Sargon winning, and although I am predisposed to wanting Sargon to do well of course, often the opponent engine seems to just give up and start jettisoning material. This brings me no joy. I am not sure what you are doing, but something seems off.

[Chessqueen]

I used Tarrasch Toy Engine when I was bringing up Sargon. I wrote Tarrasch Toy engine myself and I was not surprised that it outclassed Sargon in all my tests. It's actually a rather similar engine to Sargon (because I only really knew the basic ideas of Shannon etc. when I wrote it - i.e. primitive engine ideas, just like those employed by Sargon). So like Sargon TTE does a broad shallow search, with SOMA to try and reduce the impact of the shallow depth. Simple minimax with alpha-beta to speed things up. Alpha-Beta is way way simpler in Sargon incidentally. If I ever write another engine I will avoid the monstrosity that was alpha-beta in TTE. Although TTE is C++ and Sargon is assembler, TTE is likely still quicker at generating moves etc because it uses lookup tables, using memory Sargon could never afford. So they are comparable in many ways, BUT Sargon has an absolutely primitive, zero knowledge leaf evaluator, whereas I spent a bit of time teaching TTE my favourite nuggets of chess wisdom. So it can play endings quite well for example, using its king, fighting for passed pawns, bullying weak opponents. Things Sargon can only dream of.

So I was unsurprised that TTE is considerably stronger than Sargon. This game of yours seems weird to me, after 19.Nc4 Sargon threatens a knight fork, and TTE just allows it ??! I set TTE as a kibitzer and just allowing the knight fork in this position doesn't appear in the analysis at all.

I have stepped through other games where you have Sargon winning, and although I am predisposed to wanting Sargon to do well of course, often the opponent engine seems to just give up and start jettisoning material. This brings me no joy. I am not sure what you are doing, but something seems off.

I have set up this position 5 times under Arena and it always play 19. Nc4 if you click under game and then click Demo to let them play both sides sargon always play the same move 19.Nc4

[Event "Computer chess game"]
[Site "DESKTOP-OFQ3C0P"]
[Date "2021.02.08"]
[Round "?"]
[White "Sargon-engine Depth6"]
[Black "TarraschToyEngineV0.906"]
[Result ""]
[BlackElo "1480"]
[ECO "A03"]
[Opening "Bird Opening"]
[Time "20:36:09"]
[Variation "1...d5 2.Nf3 c5"]
[WhiteElo "????"]
[TimeControl "0+90"]
[Termination "normal"]
[PlyCount "75"]


1. f4 d5 2. Nf3 c5 3. b3 Nc6 {(Nb8-c6 Nb1-c3 Ng8-f6) +0.17/3 0} 4. Ba3
{(Bc1-a3 Qd8-d6 Nb1-c3 Ng8-f6 g2-g3 e7-e5) -0.87/6 17} e6 {(e7-e6 Nb1-c3
Ng8-f6 e2-e3) +0.07/4 0} 5. e3 {(e2-e3 Ng8-f6 Bf1-d3 Qd8-a5 Ke1-f2 c5-c4)
0.00/6 22} Qc7 {(Qd8-c7 Nb1-c3 Ng8-f6) +0.35/3 0} 6. Bb5 {(Bf1-b5 Bc8-d7
Nb1-c3 Qc7-a5 Qd1-c1 d5-d4) +0.25/6 24} Nf6 {(Ng8-f6 Nb1-c3) +0.20/2 0} 7.
O-O {(O-O Bc8-d7 Nb1-c3 Qc7-a5 Qd1-c1 d5-d4) +0.25/6 30} Bd6 {(Bf8-d6
Nb1-c3 a7-a6 Bb5xc6+) +0.05/4 0} 8. Bb2 {(Ba3-b2 Bc8-d7 Bb2xf6 g7xf6 Nb1-c3
O-O) +0.37/6 32} O-O {(O-O Nb1-c3 e6-e5) +0.42/3 0} 9. Na3 {(Nb1-a3 Bc8-d7
Bb5xc6 Qc7xc6 Kg1-f2 c5-c4) -0.25/6 43} a6 {(a7-a6 Bb5-a4) +0.50/2 0} 10.
Bxc6 {(Bb5xc6 b7xc6 Kg1-f2 Bc8-b7 Bb2xf6 g7xf6) +0.25/6 26} bxc6 {(b7xc6
Qd1-e2 Bc8-b7) -0.02/3 0} 11. Be5 {(Bb2-e5 Bd6xe5 f4xe5 Nf6-g4 Nf3-g5
Ng4xe5) -0.25/6 24} Bxe5 {(Bd6xe5 Nf3xe5 Bc8-b7) +0.52/3 0} 12. Nxe5
{(Nf3xe5 a6-a5 Ra1-b1 Bc8-a6 d2-d3 d5-d4) -0.25/6 15} Qa5 {(Qc7-a5 Qd1-c1)
+0.07/2 0} 13. Qc1 {(Qd1-c1 Bc8-b7 Ra1-b1 Nf6-e4 Ne5-f3 Ne4-d6) 0.00/6 11}
Bb7 {(Bc8-b7 d2-d4 c5xd4) +0.17/3 0} 14. g4 {(g2-g4 Rf8-d8 Kg1-f2 Nf6-e4+
Kf2-e2 f7-f6) 0.00/6 22} Qc7 {(Qa5-c7 Qc1-b2) +0.17/2 0} 15. Kg2 {(Kg1-g2
Nf6-e4 d2-d3 Ne4-c3 Qc1-e1 Nc3-b5) +0.25/6 16} a5 {(a6-a5 Qc1-b2) +0.40/2
0} 16. Qe1 {(Qc1-e1 Bb7-a6 d2-d3 Rf8-b8 g4-g5 Nf6-d7) +0.25/6 29} Nd7
{(Nf6-d7 Ne5-d3 f7-f5) +0.62/3 0} 17. Nxd7 {(Ne5xd7 Qc7xd7 d2-d3 f7-f5
g4xf5 e6xf5) +0.37/6 16} Qxd7 {(Qc7xd7 Qe1-f2 f7-f5) +0.32/3 0} 18. d3
{(d2-d3 f7-f5 g4-g5 Kg8-f7 d3-d4 Qd7-d6) +0.25/6 21} d4 {(d5-d4 e3xd4
c5xd4) +0.47/3 0}

[Chessqueen]

What seems to be strange is that if you start from move 19. and let them play it out after 5 times it always make the same move some but later on it change and the game is a complete different ending


[pgn][Event "Computer chess game"]
[Site "DESKTOP-OFQ3C0P"]
[Date "2021.02.08"]
[Round "?"]
[White "Sargon-engine Depth6"]
[Black "TarraschToyEngineV0.906"]
[Result "*"]
[BlackElo "2000"]
[ECO "A03"]
[Opening "Bird Opening"]
[Time "20:36:09"]
[Variation "1...d5 2.Nf3 c5"]
[WhiteElo "2000"]
[TimeControl "0+90"]
[Termination "normal"]
[PlyCount "71"]
[WhiteType "program"]
[BlackType "program"]

1. f4 d5 2. Nf3 c5 3. b3 Nc6 {(Nb8-c6 Nb1-c3 Ng8-f6) +0.17/3} 4. Ba3
{(Bc1-a3 Qd8-d6 Nb1-c3 Ng8-f6 g2-g3 e7-e5) -0.87/6 17} e6 {(e7-e6 Nb1-c3
Ng8-f6 e2-e3) +0.07/4} 5. e3 {(e2-e3 Ng8-f6 Bf1-d3 Qd8-a5 Ke1-f2 c5-c4)
0.00/6 22} Qc7 {(Qd8-c7 Nb1-c3 Ng8-f6) +0.35/3} 6. Bb5 {(Bf1-b5 Bc8-d7
Nb1-c3 Qc7-a5 Qd1-c1 d5-d4) +0.25/6 24} Nf6 {(Ng8-f6 Nb1-c3) +0.20/2} 7.
O-O {(O-O Bc8-d7 Nb1-c3 Qc7-a5 Qd1-c1 d5-d4) +0.25/6 30} Bd6 {(Bf8-d6
Nb1-c3 a7-a6 Bb5xc6+) +0.05/4} 8. Bb2 {(Ba3-b2 Bc8-d7 Bb2xf6 g7xf6 Nb1-c3
O-O) +0.37/6 32} O-O {(O-O Nb1-c3 e6-e5) +0.42/3} 9. Na3 {(Nb1-a3 Bc8-d7
Bb5xc6 Qc7xc6 Kg1-f2 c5-c4) -0.25/6 43} a6 {(a7-a6 Bb5-a4) +0.50/2} 10.
Bxc6 {(Bb5xc6 b7xc6 Kg1-f2 Bc8-b7 Bb2xf6 g7xf6) +0.25/6 26} bxc6 {(b7xc6
Qd1-e2 Bc8-b7) -0.02/3} 11. Be5 {(Bb2-e5 Bd6xe5 f4xe5 Nf6-g4 Nf3-g5 Ng4xe5)
-0.25/6 24} Bxe5 {(Bd6xe5 Nf3xe5 Bc8-b7) +0.52/3} 12. Nxe5 {(Nf3xe5 a6-a5
Ra1-b1 Bc8-a6 d2-d3 d5-d4) -0.25/6 15} Qa5 {(Qc7-a5 Qd1-c1) +0.07/2} 13.
Qc1 {(Qd1-c1 Bc8-b7 Ra1-b1 Nf6-e4 Ne5-f3 Ne4-d6) 0.00/6 11} Bb7 {(Bc8-b7
d2-d4 c5xd4) +0.17/3} 14. g4 {(g2-g4 Rf8-d8 Kg1-f2 Nf6-e4+ Kf2-e2 f7-f6)
0.00/6 22} Qc7 {(Qa5-c7 Qc1-b2) +0.17/2} 15. Kg2 {(Kg1-g2 Nf6-e4 d2-d3
Ne4-c3 Qc1-e1 Nc3-b5) +0.25/6 16} a5 {(a6-a5 Qc1-b2) +0.40/2} 16. Qe1
{(Qc1-e1 Bb7-a6 d2-d3 Rf8-b8 g4-g5 Nf6-d7) +0.25/6 29} Nd7 {(Nf6-d7 Ne5-d3
f7-f5) +0.62/3} 17. Nxd7 {(Ne5xd7 Qc7xd7 d2-d3 f7-f5 g4xf5 e6xf5) +0.37/6
16} Qxd7 {(Qc7xd7 Qe1-f2 f7-f5) +0.32/3} 18. d3 {(d2-d3 f7-f5 g4-g5 Kg8-f7
d3-d4 Qd7-d6) +0.25/6 21} d4 {(d5-d4 e3xd4 c5xd4) +0.47/3} 19. Nc4 {(Na3-c4
Qd7-d5+ Kg2-g3 d4xe3 Nc4-b6 Qd5-d4) +1.00/6 12} Qc7 {(Qd7-c7 Qe1-e2 Rf8-e8
g4-g5 Bb7-a6 e3xd4 c5xd4 Nc4-e5) -0.30/8 184} 20. a4 {(a2-a4 Qc7-d8 e3xd4
c5xd4 Qe1-e5 c6-c5+ Kg2-g3) +1.25/6 38} f5 {(f7-f5 Qe1-e2) +0.07/2 0} 21.
exd4 {(e3xd4 f5xg4 Qe1xe6+ Qc7-f7 Qe6-e5 c5xd4) +1.50/6 14} cxd4 {(c5xd4
Qe1xe6+ Qc7-f7) -0.72/3 0} 22. Qxe6+ {(Qe1xe6+ Kg8-h8 g4xf5 Ra8-e8 Qe6-d6
c6-c5+ Kg2-g3) +2.25/6 11} Kh8 {(Kg8-h8 g4xf5 c6-c5+) -1.87/3 0} 23. gxf5
{(g4xf5 c6-c5+ Kg2-g3 Qc7-c6 Qe6xc6 Bb7xc6) +2.25/6 21} Rae8 {(Ra8-e8
Qe6-d6) -0.97/2 0} 24. Qd6 {(Qe6-d6 Qc7xd6 Nc4xd6 Re8-e2+ Rf1-f2 Re2-e7)
+2.75/6 15} c5+ {(c6-c5+ Kg2-g1) -0.85/2 0} 25. Kg3 {(Kg2-g3 Qc7xd6 Nc4xd6
Re8-e3+ Kg3-g4 Bb7-g2) +2.25/6 13} Qf7 {(Qc7-f7 Qd6xc5) -1.67/2 0} 26. Qxc5
{(Qd6xc5 Qf7-d5 Qc5xd5 Bb7xd5 Kg3-g4 Re8-e2) +3.75/6 22} Qxf5 {(Qf7xf5
Qc5xd4) -2.70/2 0} 27. Qxf5 {(Qc5xf5 Rf8xf5 Nc4-d6 Re8-e3+ Kg3-g4 Rf5-c5)
+5.00/6 66} Rxf5 {(Rf8xf5 Nc4-d6 Rf5-f8) -5.42/3 0} 28. Nd6 {(Nc4-d6
Re8-e3+ Kg3-g4 Rf5-c5 Nd6xb7 Rc5xc2) +4.75/6 8} Rff8 {(Rf5-f8 Nd6xb7
Re8-a8) -4.82/3 0} 29. Nxb7 {(Nd6xb7 Rf8-f5 Nb7-d6 Re8-e3+ Kg3-h4 Rf5-f6)
+5.25/6 7} Rc8 {(Re8-c8 Nb7xa5) -5.05/2 0} 30. Rfc1 {(Rf1-c1 Rc8-c6 Nb7xa5
Rc6-g6+ Kg3-f3 Rg6-g5) +6.25/6 14} Ra8 {(Rc8-a8 Nb7-c5 Ra8-c8 Nc5-e6)
-5.07/4 0} 31. Re1 {(Rc1-e1 Rf8-c8 Ra1-c1 Rc8-c7 Nb7-d6 Rc7-c6) +5.25/6 4}
Rfc8 {(Rf8-c8 Ra1-c1 Rc8-b8) -4.82/3 0} 32. Re2 {(Re1-e2 Ra8-a6 Kg3-f3
Kh8-g8 Kf3-e4 Rc8-c7) +6.25/6 13} Ra6 {(Ra8-a6 Kg3-g2 Ra6-a8) -4.80/3 0}
33. Rae1 {(Ra1-e1 Kh8-g8 h2-h3 Kg8-f7 Kg3-g4 Rc8-c7) +5.25/6 17} Rg6+
{(Ra6-g6+ Kg3-f3 Rc8-a8) -4.77/3 0} 34. Kf3 {(Kg3-f3 Rc8-f8 Nb7xa5 Rg6-f6
Re2-e4 Rf6-d6) +6.75/6 3} Ra6 {(Rg6-a6 Kf3-g2) -5.02/2 0} 35. Re8+
{(Re2-e8+ Rc8xe8 Re1xe8+) +M2/3 0} Rxe8 {(Rc8xe8) -5.15/2} 36. Rxe8# *[/pgn]

[Guenther]

I used Tarrasch Toy Engine when I was bringing up Sargon. I wrote Tarrasch Toy engine myself and I was not surprised that it outclassed Sargon in all my tests. It's actually a rather similar engine to Sargon (because I only really knew the basic ideas of Shannon etc. when I wrote it - i.e. primitive engine ideas, just like those employed by Sargon). So like Sargon TTE does a broad shallow search, with SOMA to try and reduce the impact of the shallow depth. Simple minimax with alpha-beta to speed things up. Alpha-Beta is way way simpler in Sargon incidentally. If I ever write another engine I will avoid the monstrosity that was alpha-beta in TTE. Although TTE is C++ and Sargon is assembler, TTE is likely still quicker at generating moves etc because it uses lookup tables, using memory Sargon could never afford. So they are comparable in many ways, BUT Sargon has an absolutely primitive, zero knowledge leaf evaluator, whereas I spent a bit of time teaching TTE my favourite nuggets of chess wisdom. So it can play endings quite well for example, using its king, fighting for passed pawns, bullying weak opponents. Things Sargon can only dream of.

So I was unsurprised that TTE is considerably stronger than Sargon. This game of yours seems weird to me, after 19.Nc4 Sargon threatens a knight fork, and TTE just allows it ??! I set TTE as a kibitzer and just allowing the knight fork in this position doesn't appear in the analysis at all.

I have stepped through other games where you have Sargon winning, and although I am predisposed to wanting Sargon to do well of course, often the opponent engine seems to just give up and start jettisoning material. This brings me no joy. I am not sure what you are doing, but something seems off.

I have set up this position 5 times under Arena and it always play 19. Nc4 if you click under game and then click Demo to let them play both sides sargon always play the same move 19.Nc4

...

You cannot read... Bill talked about TTE after 19. Nc4. I hope I don't need to explain what TTE means after all?

Moreover, please set your Arena finally not to save full PVs into pgn, or remove it before posting here.
So often people here were told to do so (you, surely a dozen of times with various user accounts).
For a quick check that Arena crap stuff is completely distracting from reading.

@Bill: TTE was forced to play the whole game in zero seconds ;-)
(ran the crappy pgn again through a script)

[White "Sargon-engine Depth6"]
[Black "TarraschToyEngineV0.906"]
[Result "1-0"]

1. f4 d5
2. Nf3 c5
3. b3 Nc6 {+0.17/3 0}
4. Ba3 {-0.87/6 17} e6 {+0.07/4 0}
5. e3 {0.00/6 22} Qc7 {+0.35/3 0}
6. Bb5 {+0.25/6 24} Nf6 {+0.20/2 0}
7. O-O {+0.25/6 30} Bd6 {+0.05/4 0}
8. Bb2 {+0.37/6 32} O-O {+0.42/3 0}
9. Na3 {-0.25/6 43} a6 {+0.50/2 0}
10. Bxc6 {+0.25/6 26} bxc6 {-0.02/3 0}
11. Be5 {-0.25/6 24} Bxe5 {+0.52/3 0}
12. Nxe5 {-0.25/6 15} Qa5 {+0.07/2 0}
13. Qc1 {0.00/6 11} Bb7 {+0.17/3 0}
14. g4 {0.00/6 22} Qc7 {+0.17/2 0}
15. Kg2 {+0.25/6 16} a5 {+0.40/2 0}
16. Qe1 {+0.25/6 29} Nd7 {+0.62/3 0}
17. Nxd7 {+0.37/6 16} Qxd7 {+0.32/3 0}
18. d3 {+0.25/6 21} d4 {+0.47/3 0}
19. Nc4 {+1.00/6 12} f5 {+0.05/2 0}
20. Nb6 {+2.25/6 32} Qd6 {-1.67/3 0}
21. Nxa8 {+2.75/6 15} Rxa8 {-1.65/3 0}
22. gxf5 {+2.75/6 15} exf5 {-1.32/3 0}
23. exd4 {+2.25/6 33} Qd5+ {-1.47/3 0}
24. Kg3 {+2.00/6 4} cxd4 {-1.67/3 0}
25. Qe2 {+2.62/6 15} c5 {-1.70/3 0}
26. Rae1 {+2.37/6 15} Rb8 {-1.65/2 0}
27. Rg1 {+1.50/6 24} Ra8 {-1.67/2 0}
28. Kh4 {+3.12/6 15} Rb8 {-1.67/2 0}
29. Qe5 {+3.75/6 11} Qxe5 {-2.55/2 0}
30. Rxe5 {+4.00/6 3} Ra8 {-2.57/3 0}
31. Re7 {+4.75/6 9} Bc6 {-3.72/3 0}
32. Rgxg7+ {+4.75/6 5} Kh8 {-4.05/4 0}
33. Rxh7+ {+5.25/6 3} Kg8 {-3.90/2}
34. Kg5 {+5.25/6 5} Re8 {-5.07/4 0}
35. Reg7+ {+7.50/6 5} Kf8 {-4.90/2}
36. Kf6 {+10.75/6 9} Bd5 {-50.00/4 0}
37. Rh8+ {+M2/3 0} Bg8 {-6.87/2}
38. Rgxg8# 1-0

[Chessqueen]

I used Tarrasch Toy Engine when I was bringing up Sargon. I wrote Tarrasch Toy engine myself and I was not surprised that it outclassed Sargon in all my tests. It's actually a rather similar engine to Sargon (because I only really knew the basic ideas of Shannon etc. when I wrote it - i.e. primitive engine ideas, just like those employed by Sargon). So like Sargon TTE does a broad shallow search, with SOMA to try and reduce the impact of the shallow depth. Simple minimax with alpha-beta to speed things up. Alpha-Beta is way way simpler in Sargon incidentally. If I ever write another engine I will avoid the monstrosity that was alpha-beta in TTE. Although TTE is C++ and Sargon is assembler, TTE is likely still quicker at generating moves etc because it uses lookup tables, using memory Sargon could never afford. So they are comparable in many ways, BUT Sargon has an absolutely primitive, zero knowledge leaf evaluator, whereas I spent a bit of time teaching TTE my favourite nuggets of chess wisdom. So it can play endings quite well for example, using its king, fighting for passed pawns, bullying weak opponents. Things Sargon can only dream of.

So I was unsurprised that TTE is considerably stronger than Sargon. This game of yours seems weird to me, after 19.Nc4 Sargon threatens a knight fork, and TTE just allows it ??! I set TTE as a kibitzer and just allowing the knight fork in this position doesn't appear in the analysis at all.

I have stepped through other games where you have Sargon winning, and although I am predisposed to wanting Sargon to do well of course, often the opponent engine seems to just give up and start jettisoning material. This brings me no joy. I am not sure what you are doing, but something seems off.

I have set up this position 5 times under Arena and it always play 19. Nc4 if you click under game and then click Demo to let them play both sides sargon always play the same move 19.Nc4

...

You cannot read... Bill talked about TTE after 19. Nc4. I hope I don't need to explain what TTE means after all?

Moreover, please set your Arena finally not to save full PVs into pgn, or remove it before posting here.
So often people here were told to do so (you, surely a dozen of times with various user accounts).
For a quick check that Arena crap stuff is completely distracting from reading.

@Bill: TTE was forced to play the whole game in zero seconds
(ran the crappy pgn again through a script)

[White "Sargon-engine Depth6"]
[Black "TarraschToyEngineV0.906"]
[Result "1-0"]

1. f4 d5
2. Nf3 c5
3. b3 Nc6 {+0.17/3 0}
4. Ba3 {-0.87/6 17} e6 {+0.07/4 0}
5. e3 {0.00/6 22} Qc7 {+0.35/3 0}
6. Bb5 {+0.25/6 24} Nf6 {+0.20/2 0}
7. O-O {+0.25/6 30} Bd6 {+0.05/4 0}
8. Bb2 {+0.37/6 32} O-O {+0.42/3 0}
9. Na3 {-0.25/6 43} a6 {+0.50/2 0}
10. Bxc6 {+0.25/6 26} bxc6 {-0.02/3 0}
11. Be5 {-0.25/6 24} Bxe5 {+0.52/3 0}
12. Nxe5 {-0.25/6 15} Qa5 {+0.07/2 0}
13. Qc1 {0.00/6 11} Bb7 {+0.17/3 0}
14. g4 {0.00/6 22} Qc7 {+0.17/2 0}
15. Kg2 {+0.25/6 16} a5 {+0.40/2 0}
16. Qe1 {+0.25/6 29} Nd7 {+0.62/3 0}
17. Nxd7 {+0.37/6 16} Qxd7 {+0.32/3 0}
18. d3 {+0.25/6 21} d4 {+0.47/3 0}
19. Nc4 {+1.00/6 12} f5 {+0.05/2 0}
20. Nb6 {+2.25/6 32} Qd6 {-1.67/3 0}
21. Nxa8 {+2.75/6 15} Rxa8 {-1.65/3 0}
22. gxf5 {+2.75/6 15} exf5 {-1.32/3 0}
23. exd4 {+2.25/6 33} Qd5+ {-1.47/3 0}
24. Kg3 {+2.00/6 4} cxd4 {-1.67/3 0}
25. Qe2 {+2.62/6 15} c5 {-1.70/3 0}
26. Rae1 {+2.37/6 15} Rb8 {-1.65/2 0}
27. Rg1 {+1.50/6 24} Ra8 {-1.67/2 0}
28. Kh4 {+3.12/6 15} Rb8 {-1.67/2 0}
29. Qe5 {+3.75/6 11} Qxe5 {-2.55/2 0}
30. Rxe5 {+4.00/6 3} Ra8 {-2.57/3 0}
31. Re7 {+4.75/6 9} Bc6 {-3.72/3 0}
32. Rgxg7+ {+4.75/6 5} Kh8 {-4.05/4 0}
33. Rxh7+ {+5.25/6 3} Kg8 {-3.90/2}
34. Kg5 {+5.25/6 5} Re8 {-5.07/4 0}
35. Reg7+ {+7.50/6 5} Kf8 {-4.90/2}
36. Kf6 {+10.75/6 9} Bd5 {-50.00/4 0}
37. Rh8+ {+M2/3 0} Bg8 {-6.87/2}
38. Rgxg8# 1-0

So that move after 19.Nc4 Nb6 was different I do NOT know why. It seems that I just learn how to read

[Guenther]

You cannot read... Bill talked about TTE after 19. Nc4. I hope I don't need to explain what TTE means after all?

So that move after 19.Nc4 Nb6 was different I do NOT know why. It seems that I just learn how to read :roll: :mrgreen:

wrong again - it really makes no sense, it's like talking to a stone?
another hint: TTE != Sargon, Nb6 is not the move after Nc4

Some people here should have added a kind of warning level to their name, thus new users won't waste their time
taking them seriously.

[Chessqueen]

You cannot read... Bill talked about TTE after 19. Nc4. I hope I don't need to explain what TTE means after all?

So that move after 19.Nc4 Nb6 was different I do NOT know why. It seems that I just learn how to read

wrong again - it really makes no sense, it's like talking to a stone?
another hint: TTE != Sargon, Nb6 is not the move after Nc4

Some people here should have added a kind of warning level to their name, thus new users won't waste their time
taking them seriously.

It is NOT my fault that TTE chose a different move after 19.Nc4..... what do I have to do with it, stop being so rude!