What is the record for the most pawn double-steps in a professional game? Quite simply, what is the record for the most pawn double-steps in a professional game? Drawn and won games are both considered.  Computer games of any kind are not to be considered.
The most I have found, in quite a few games, is 8. For example, here is a game in which all 8 double steps occur in just 15 moves.
[Title &quot;John Cochrane-Bonnerjee Mohishunder, Calcutta, 1855&quot;]
[FEN &quot;&quot;]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. Bc4+ Be6 6. Bxe6+ Kxe6 7. O-O Kd7 8. d4 Kc8 9. c4 Nbd7 10. Nc3 Kb8 11. f4 a6 12. a4 Ka7 13. b4 Rc8 14. Be3 Kb8 15. a5 c5 16. b5 Ka7 17. d5 g6 18. Qb3 Bg7 19. Rfb1 Rb8 20. b6+ Ka8 21. Nb5 Ne8 22. Ra2 Rf8 23. Na7 Ndf6 24. Nc6 Qd7 25. Nxb8 Kxb8 26. e5 Ng4 27. e6 Qe7 28. Kh1 Qh4 29. g3 Qh3 30. Bg1 g5 31. Qa4 Nef6 32. e7 Rc8 33. fxg5 Ne4 34. Rg2 Nc3 35. e8=Q Nxa4 36. Qxa4 Rf8 37. Re1 Be5 38. Qb3 Kc8 39. Qd3 Kd7 40. Rf1 Ke7 41. Rxf8 Kxf8 42. Qf5+ Kg7 43. Qd7+ Kg6 44. Qxb7 Bd4 45. Bxd4 cxd4 46. Qc6 d3 47. Qxd6+ Kxg5 48. Qf4+ Kg6 49. Qe4+ Kg7 50. Qxd3
This is clearly contrived, but it was an actual tournament game so it wins that record. :)

  [Title "Danny Jazmati-Marcel Harff, NRW-ch U12, 2002"]
  [FEN ""]

1. a4 a5 2. b4 b5 3. c4 c5 4. d4 d5 5. e4 e5 6. f4 f5 7. g4 g5 8. h4 h5 9. Ra2 Rh6 10. Rh3 Raa6 11. Bd2 Be7 12. Bc3 Bf6 13. Nd2 Ne7 14. Nb3 Ng6 15. Ne2 Bb7 16. Kf2 Nd7 1/2-1/2