| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. H G Voigt vs J C Halpern |
| 1-0 | 37 | 1899 | New York v Pennsylvania Interstate Teams Match | C01 French, Exchange |
| 27. J C Halpern vs E Delmar |
| 0-1 | 41 | 1899 | Delmar - Halpern 1899/00 | B00 Uncommon King's Pawn Opening |
| 28. J C Halpern vs E Delmar |
| 1-0 | 38 | 1900 | Delmar - Halpern 1899/00 | C70 Ruy Lopez |
| 29. J C Halpern vs E Delmar |
| 0-1 | 42 | 1900 | Delmar - Halpern 1899/00 | C42 Petrov Defense |
| 30. J C Halpern vs O Roething |
| 0-1 | 47 | 1900 | Roething - Halpern | C44 King's Pawn Game |
| 31. O Roething vs J C Halpern |
| 1-0 | 27 | 1900 | Roething - Halpern | C42 Petrov Defense |
| 32. J C Halpern vs O Roething |
| ½-½ | 54 | 1900 | Roething - Halpern | C48 Four Knights |
| 33. O Roething vs J C Halpern |
| 1-0 | 49 | 1900 | Roething - Halpern | C42 Petrov Defense |
| 34. J C Halpern vs O Roething |
| 0-1 | 19 | 1900 | Roething - Halpern | C38 King's Gambit Accepted |
| 35. J C Halpern vs Marshall |
| 0-1 | 27 | 1900 | Manhattan CC Championship 1900/01 | C42 Petrov Defense |
| 36. J C Halpern vs A B Hodges |
| 1-0 | 26 | 1901 | Manhattan CC Championship 1901 | C73 Ruy Lopez, Modern Steinitz Defense |
| 37. Marshall vs J C Halpern |
| 1-0 | 56 | 1901 | Manhattan CC Championship 1901 | D43 Queen's Gambit Declined Semi-Slav |
| 38. J C Halpern vs H Phillips |
| 1-0 | 15 | 1902 | Manhattan CC Championship 1902/03 | C49 Four Knights |
| 39. J C Halpern vs H Keidanz |
| 1-0 | 47 | 1902 | Manhattan CC Championship 1902/03 | C66 Ruy Lopez |
| 40. D G Baird vs J C Halpern |
| 0-1 | 34 | 1902 | Manhattan CC Championship 1902/03 | A85 Dutch, with c4 & Nc3 |
| 41. J C Halpern vs L Schmidt |
| 1-0 | 30 | 1902 | Manhattan CC Championship 1902/03 | C68 Ruy Lopez, Exchange |
| 42. W Koch vs J C Halpern |
| 0-1 | 29 | 1902 | Manhattan CC Championship 1902/03 | A83 Dutch, Staunton Gambit |
| 43. J M Hanham vs J C Halpern |
| 1-0 | 85 | 1902 | Manhattan CC Championship 1902/03 | C20 King's Pawn Game |
| 44. W Jones vs J C Halpern |
| ½-½ | 36 | 1902 | Manhattan CC Championship 1902/03 | C01 French, Exchange |
| 45. O Roething vs J C Halpern |
| ½-½ | 83 | 1902 | Manhattan CC Championship 1902/03 | C43 Petrov, Modern Attack |
| 46. J C Halpern vs E Delmar |
| 0-1 | 47 | 1902 | Manhattan CC Championship 1902/03 | A00 Uncommon Opening |
| 47. J M Hanham vs J C Halpern |
| 1-0 | 74 | 1902 | Manhattan CC Championship 1902/03 | C23 Bishop's Opening |
| 48. J C Halpern vs H Phillips |
| ½-½ | 57 | 1903 | Manhattan CC Championship 1902/03 | C21 Center Game |
| 49. H Phillips vs J C Halpern |
| 0-1 | 30 | 1903 | Manhattan CC Championship 1902/03 | D50 Queen's Gambit Declined |
| 50. J C Halpern vs J M Hanham |
| 0-1 | 70 | 1903 | Manhattan CC Championship 1902/03 | C45 Scotch Game |
Kibitzing
