Stockfish loses some 1.f3 games

[Jouni]

Example game 3m + 2s and four cores:

[pgn]
[Event "1. f3"]
[Site "?"]
[Date "2025.10.30"]
[Round "10"]
[White "Stockfish 17.1"]
[Black "Stockfish dev-20251014-75edbe"]
[Result "0-1"]
[ECO "A00"]
[Annotator "-0.64;-0.82"]
[PlyCount "116"]
[TimeControl "180+2"]

1. f3 {Both last book move
} e5 {-0.82/25 8} 2. Nc3 {-0.64/36 34} Nc6 {-0.88/26 4} 3. e4 {-0.67/25 2 (e3)}
Bc5 {-0.86/24 3} 4. Bc4 {-0.71/33 29 (f4)} d6 {-0.80/25 4 (a5)} 5. d3 {-0.82/
30 4} a5 {-0.75/26 7} 6. a3 {-0.78/29 6} h6 {-0.79/29 25} 7. Bd2 {-0.82/30 12}
a4 {-0.78/23 3} 8. Bb5 {-0.68/29 10 (Qc1)} Nge7 {-0.84/24 6} 9. Nxa4 {-0.67/26
2} Ba7 {-0.80/24 3} 10. Nc3 {-0.71/27 3} Ng6 {-0.68/31 50} 11. h4 {-0.68/30 5}
O-O {-0.68/24 3} 12. Bc4 {-0.68/30 4} Nd4 {-0.67/31 27} 13. Nge2 {-0.62/29 5}
c6 {-0.62/27 2} 14. Nxd4 {-0.61/28 3} exd4 {-0.69/23 3} 15. Ne2 {-0.62/27 3} d5
{-0.68/24 2} 16. Ba2 {-0.60/28 5} dxe4 {-0.60/26 9} 17. fxe4 {-0.62/27 4} Bb8 {
-0.62/23 3} 18. h5 {-0.66/28 4} Ne5 {-0.61/25 3} 19. O-O {-0.64/26 3} Ng4 {-0.
66/26 2} 20. g3 {-0.68/27 3} c5 {-0.75/25 3 (Ra6)} 21. Nf4 {-0.79/29 6} Ra6 {
-0.75/25 3} 22. Bd5 {-0.59/29 16 (Qe2)} Ne5 {-0.78/28 17} 23. Qe2 {-0.74/28 9}
Kh7 {-0.87/22 2} 24. Qg2 {-0.71/26 3} g5 {-0.76/28 8} 25. hxg6+ {-0.71/26 4}
fxg6 {-0.74/24 3} 26. Ne2 {-0.70/26 4} g5 {-0.71/26 4} 27. Rxf8 {-0.74/31 17}
Qxf8 {-0.67/25 6} 28. Rf1 {-0.76/28 3} Rf6 {-0.64/25 4} 29. Rf5 {-0.69/28 5}
Qd6 {-0.62/27 17} 30. g4 {-0.64/26 6} Qd8 {-0.79/18 1} 31. Ba2 {-0.76/27 7} Rf8
{-0.87/19 1} 32. a4 {-0.72/28 13 (b4)} Qd6 {-0.87/23 5} 33. Bd5 {-0.70/24 2}
Bxf5 {-0.92/17 1} 34. gxf5 {-0.77/25 3} Qf6 {-0.92/19 1} 35. Kh1 {-0.33/25 3
(Qh1)} g4 {-0.46/24 6 (c4)} 36. Bf4 {-0.20/21 1} h5 {-0.77/17 0} 37. Qh2 {-0.
12/22 2} h4 {-0.88/17 1} 38. a5 {-0.86/31 10} Nf3 {-0.86/18 1} 39. Qg2 {-0.87/
20 0} Qg7 {-0.86/21 1} 40. Bxb7 {-0.91/32 5} Bxf4 {-0.92/19 1} 41. Nxf4 {-1.00/
20 0} Rg8 {-0.99/20 1} 42. Bd5 {-0.96/20 0} Rd8 {-1.04/20 1} 43. a6 {-0.95/25 1
} Rd6 {-1.05/21 1} 44. Bc4 {-1.24/26 4} Rb6 {-1.09/22 1} 45. b3 {-1.03/23 2}
Rc6 {-1.13/23 3} 46. Qf2 {-1.41/24 3} Rc7 {-1.42/25 6} 47. Ne2 {-1.54/21 1} Qh6
{-1.53/18 1} 48. e5 {-1.74/22 1 (Be6)} Nxe5 {-1.88/16 1} 49. f6 {-1.44/22 1}
Qe3 {-2.24/19 1} 50. Qf5+ {-2.61/21 5 (Qxh4+)} Kh6 {-2.78/19 1} 51. Ng1 {-2.51/
20 1} Qg5 {-2.99/20 2} 52. Qe6 {-3.00/23 4} Nxc4 {-3.22/18 1} 53. bxc4 {-3.16/
18 1} g3 {-3.45/18 1} 54. f7+ {-3.71/22 3 (Nf3)} Kg7 {-3.91/19 1} 55. f8=Q+ {
-4.04/22 2} Kxf8 {-4.33/20 1} 56. Qd6+ {-4.56/20 2} Re7 {-4.77/20 2} 57. a7 {
-4.89/21 2 (Kg2)} g2+ {-5.09/14 2} 58. Kh2 {-5.56/16 1} Qg3+ {-5.98/15 3} 0-1

[/pgn]

In every lost game SF plays 3.e4, which seems to be error. Chessdb thinks 3.e3 is needed.