Enhancement: dynamic UCI option values

[tissatussa]

It seems Megalodon has no sense for long term strategic goals, in my case : pressure on the h-line.

You could try to dynamically change the UCI values for the pieces etc. :

first determine some game phase or position type. I have some ideas.

other simple engines have the same issue, although their style may differ : they reach only about depth 8 (i played 2 games for you, each 15 min. per player).

[Event "human vs engine"]
[Site "Holland @ https://lichess.org/9m7JVgK4/black "]
[Date "2024.02.14"]
[Round "?"]
[White "Megalodon v1.1.0"]
[Black "Roelof Berkepeis"]
[Result "0-1"]
[ECO "A02"]
[Opening "Bird's Opening"]
[TimeControl "900+3"]

1. f4 {-0.95/7 13s} b6 {522s} 2. Nf3 {-0.90/7 13s} e6 {34s} 3. c4 {-0.94/7 14s} Be7 {29s} 4. Nc3 {-0.87/7 14s} h5 {57s} 5. a3 {-0.81/7 14s} h4 {9.5s} 6. e4 {-0.78/7 15s} Nh6 {152s} 7. d4 {-0.59/7 15s} Bb7 {51s} 8. Qd3 {+1.49/6 15s} f5 {73s} 9. exf5 {-0.91/7 16s} Nxf5 {19s} 10. Ne5 {+2.08/6 16s} h3 {13s} 11. d5 {-1.59/7 17s} Bc5 {57s} 12. gxh3 {-0.63/7 18s} Qh4+ {10s} 13. Kd1 {-0.72/7 18s} Na6 {319s} 14. b4 {+3.20/6 19s} Bd4 {13s} 15. Bg2 {-1.59/7 20s} O-O-O {62s} 16. Be4 {-0.36/7 21s} Bxc3 17.Qxc3 {+1.26/8 15s} 17...Nd6 {118s} 18.Bg2 {-1.51/7 15s} 18...g5 {335s} 19.b5 {-0.65/7 16s} 19...Nc5 {13s} 20.fxg5 {-1.05/7 16s} 20...Nde4 {49s} 21.Bxe4 {+1.99/8 17s} 21...Nxe4 {3.4s} 22.Qe3 {+0.97/8 17s} 22...exd5 {63s} 23.Kc2 {-1.40/7 18s} 23...Rhf8 {100s} 24.cxd5 {-1.26/7 18s} 24...Rf2+ {21s} 25.Kd1 {-1.99/7 19s} 25...Re8 {63s} 26.Ng4 {+2.35/8 20s} 26...Bxd5 {64s} 27.Re1 {-3.07/7 21s} 27...Rg2 {102s} 28.Rf1 {-0.17/8 22s} 28...Nd6 {48s} 29.Qc3 {-3.49/7 23s} 29...Bc4 {122s} 30.Ne3 {-2.42/8 24s} 30...Qh5+ {26s} 31.Ng4 {-4.50/8 26s} 31...Bxf1 {15s} 32.Bf4 {-5.67/8 28s} 32...Be2+ {34s} 33.Kc1 {-5.51/8 30s} 33...Rg1+ {25s} 34.Kb2 {-5.50/8 33s} 34...Nxb5 {18s} 35.Rxg1 {-5.11/8 37s} 35...Nxc3 {6.0s} 36.Nf6 {-6.37/8 42s} 36...Na4+ {44s} 37.Ka1 {-10.26/10 50s} 37...Qf3 {41s} 38.Bc1 {-9.47/8 63s} 38...Qc3+ {6.8s} 39.Ka2 {+M5/9 55s} 39...Bc4+ {60s} 40.Kb1 {+M3/9 48s} 40...Re2 {49s} 41.Nxd7 {+M1/8 42s} 41...Bd3# {31s, Black mates} 0-1

[Event "human vs engine"]
[Site "Holland @ https://lichess.org/9mzuCmRo/black "]
[Date "2024.02.14"]
[Round "?"]
[White "Megalodon v1.1.0"]
[Black "Roelof Berkepeis"]
[Result "0-1"]
[ECO "A02"]
[Opening "Bird's Opening"]
[TimeControl "900+3"]

1. f4 {-0.95/7 13s} b6 {4.9s} 2. e4 {-0.90/7 13s} e6 {47s} 3. c4 {-0.91/7 14s}
   Be7 {14s} 4. a3 {-0.86/7 14s} h5 {6.3s} 5. Be2 {+1.09/6 14s} Bb7 {40s}
2. d3 {-0.92/7 15s} h4 {42s} 7. Bf3 {-0.77/7 15s} Nh6 {67s} 8. Nc3 {-0.74/7 16s}
   Nc6 {48s} 9. Nge2 {-0.70/7 16s} g6 {237s} 10. Qa4 {+1.51/6 17s} Bc5 {45s}
3. b4 {+0.11/7 17s} Bd4 {5.8s} 12. e5 {+2.04/8 18s} Nf5 {33s}
4. Qd1 {+0.03/7 18s} Qc8 {59s} 14. Bxc6 {-0.76/7 19s} Bxc6 {54s}
5. Nxd4 {+1.33/8 20s} Nxd4 {4.9s} 16. Rg1 {+1.18/8 21s} h3 {11s}
6. Be3 {+0.32/8 22s} Nf5 {9.5s} 18. Bf2 {+0.32/8 23s} hxg2 {84s}
7. b5 {-1.95/7 25s} Bb7 {32s} 20. Ne4 {-2.07/7 27s} Rxh2 {28s}
8. c5 {-4.28/7 29s} Ke7 {51s} 22. cxb6 {-3.24/7 32s} axb6 {24s}
9. Qd2 {-3.30/7 36s} Qh8 {133s} 24. Ng3 {-3.30/7 41s} Nxg3 {62s}
10. Qb4+ {-2.07/8 48s} d6 {5.5s} 26. Bxg3 {-1.10/8 60s} Rh1 {3.5s}
11. Kf2 {-1.10/8 53s} Qh5 {41s} 28. Ke3 {-2.18/8 46s} Qf3+ {9.8s}
12. Kd2 {-9.25/9 40s} Qxg3 {17s} 30. Kc3 {-4.19/8 35s} g5 {103s}
13. Qc4 {-4.29/8 31s} Kd7 {43s} 32. exd6 {-4.99/8 27s} cxd6 {15s}
14. f5 {-10.46/7 24s} Rc8 {16s} 34. fxe6+ {-7.80/8 21s} fxe6 {4.7s}
15. Qxc8+ {-7.84/8 19s} Kxc8 {2.7s} 36. Rac1 {-8.90/8 17s} Qf2 {31s}
16. Kb3+ {-13.15/9 15s} Kd7 {14s} 38. Rgd1 {-13.02/8 13s} Rxd1 {7.4s}
17. Rxd1 {-17.04/9 12s} Bd5+ {6.8s} 40. Kc3 {-16.99/9 11s} Qc5+ {25s}
18. Kd2 {-16.98/9 9.7s} Bb3 {23s} 42. Ra1 {-13.07/8 8.8s} Qf2+ {11s}
19. Kc3 {+M7/9 8.0s} Qc2+ {7.0s} 44. Kb4 {+M5/10 7.4s} Ba4 {27s}
20. Rb1 {+M3/9 6.8s} g1=Q {18s} 46. Rxg1 {+M1/8 6.3s} Qb3# {4.4s, Black mates}
    0-1

[tissatussa]

here's another one .. this time i played the White pieces, also 15 min. pp .. again, there's a lot of pressure on the h-file and now also by the long black squared diagonal .. on the long term Megalodon can't defend all squares around the King .. i let the game somehow slip away but won ..

[Event "human vs engine"]
[Site "Holland @ https://lichess.org/kxLH06nT "]
[Date "2024.02.14"]
[Round "?"]
[White "Roelof Berkepeis"]
[Black "Megalodon v1.1.0"]
[Result "1-0"]
[ECO "A04"]
[Opening "Reti Opening"]
[TimeControl "900+3"]

1. Nf3 c6 {-1.04/7 13s} 2. b3 {9.7s} e6 {-1.04/7 14s} 3. e3 {999s} Be7 {-0.98/7 14s} 4. Bb2 {5.3s} Bf6 {-0.93/7 14s} 5. Qc1 {3.9s} d6 {-0.95/7 15s} 6. g4 {23s} e5 {-0.16/7 15s} 7. h3 {69s} e4 {+0.10/7 15s} 8. Nh2 {12s} h5 {-0.70/7 16s} 9. Be2 {17s} hxg4 {+0.17/7 16s} 10. Nxg4 {22s} Bxg4 {+0.13/7 17s} 11. Bxg4 {2.4s} Nh6 {-0.67/7 17s} 12. Be2 {4.6s} Bxb2 {-1.01/7 18s} 13. Qxb2 {3.3s} O-O {+1.28/8 19s} 14. Rg1 {16s} Nf5 {+1.35/8 20s} 15. Bg4 {26s} Nh4 {+1.37/8 21s} 16. Na3 {64s} Qg5 {-0.46/7 22s} 17. O-O-O {13s} Qe7 {-0.99/7 23s} 18. c4 {75s} d5 {-0.97/7 24s} 19. Nc2 {23s} g6 {-0.95/7 26s} 20. Ne1 {89s} Rd8 {-0.87/7 28s} 21. Ng2 {33s} Nxg2 {+0.11/7 31s} 22. Rxg2 {4.1s} a6 {-0.62/7 34s} 23. Rh1 {49s} b5 {-0.54/7 38s} 24. h4 {22s} bxc4 {+2.31/8 44s} 25. h5 {29s} cxb3 {+2.27/8 53s} 26. hxg6 {11s} Qc5+ {+0.70/9 57s} 27. Kd1 {32s} Qc2+ {-1.22/11 50s} 28. Qxc2 {3.8s} bxc2+ {-0.12/10 44s} 29. Kxc2 {4.4s} c5 {-0.12/8 38s} 30. gxf7+ {10s} Kxf7 {-3.15/9 33s} 31. Rh6 {55s} Ke7 {-0.16/8 29s} 32. Re6+ {8.4s} Kf7 {-3.25/9 26s} 33. Rb6 {16s} Ke7 {-3.19/9 23s} 34. Bh5 {20s} Nd7 {-3.00/9 20s} 35. Rg7+ {31s} Kf8 {-0.02/10 18s} 36. Rf7+ {7.6s} Kg8 {-1.31/9 16s} 37. Rb7 {35s} Ne5 {-1.48/9 14s} 38. Rg7+ {4.9s} Kh8 {-0.16/8 13s} 39. Rbe7 {47s} Rab8 {+0.10/8 11s} 40. Rg3 {27s} Nc4 {+0.23/8 10s} 41. Bg6 {39s} Rb2+ {-0.15/7 9.3s} 42. Kc3 {16s} Rxa2 {0.00/8 8.5s} 43. Rh7+ {3.5s} Kg8 {-4.99/11 7.7s} 44. Bxe4+ {18s} Kf8 {-0.17/10 7.1s} 45. Rh8+ {12s} Ke7 {-0.09/10 6.6s} 46. Rxd8 {37s} Ra3+ {-1.16/9 6.1s} 47. Kc2 {4.2s} Ra2+ {-0.04/8 5.7s} 48. Kb1 {36s} Rb2+ {-0.91/8 5.3s} 49. Ka1 {4.4s} Kxd8 {-2.73/7 5.0s} 50. Bxd5 {6.2s} Rb4 {-1.30/9 4.8s} 51. d3 {92s} Ne5 {+0.28/8 4.5s} 52. Be4 {61s} Rb5 {-1.03/7 4.3s} 53. f4 {10s} Nd7 {-0.89/8 4.1s} 54. Bc6 {15s} Rb3 {-0.80/8 4.0s} 55. e4 {33s} Nf6 {-1.00/7 3.9s} 56. e5 {14s} Kc7 {-0.54/8 3.7s} 57. exf6 {23s} c4 {-3.95/7 3.6s} 58. f7 {8.9s} Ra3+ {-3.11/8 3.6s} 59. Kb2 {3.7s} c3+ {-7.03/8 3.5s} 60. Kxa3 {2.4s} c2 {-15.17/9 3.4s} 61. Kb2 {6.0s} c1=N {-15.17/8 3.3s} 62. f8=Q {38s} Nxd3+ {-14.48/8 3.2s} 63. Rxd3 {3.7s} Kxc6 {+M5/8 3.1s} 64. Qc8+ {3.1s} Kb5 {+M5/8 3.1s} 65. Rb3+ {1.7s} Ka5 {+M3/9 3.1s} 66. Qc5+ {16s} Ka4 {+M1/9 3.0s} 67. Qa3# {2.0s, White mates} 1-0