| Sep 26, 2025 | Siebenhaar | ½–½ | Gruzmann | Round 6: Siebenhaar, Erich - Gruzmann, Boris | Ponziani Opening: Jaenisch Counterattack | |
| Sep 25, 2025 | Haubt | 0–1 | Siebenhaar | Round 5: Haubt, Georg - Siebenhaar, Erich | Horwitz Defense | |
| Sep 21, 2025 | Weidemann | 1–0 | Siebenhaar | Round 1: Weidemann, Joerg - Siebenhaar, Erich | King's Pawn Game | |
| Sep 11, 2024 | Siebenhaar | ½–½ | Paus | Round 9: Siebenhaar, Erich - Paus, Franz | Nimzo-Larsen Attack: Modern Variation | |
| Sep 10, 2024 | Schott | ½–½ | Siebenhaar | Round 8: Schott, Guido - Siebenhaar, Erich | Horwitz Defense | |
| Sep 8, 2024 | Siebenhaar | ½–½ | Huettemann | Round 6: Siebenhaar, Erich - Huettemann, Karl-Heinz | Rapport-Jobava System | |
| Sep 7, 2024 | Siebenhaar | ½–½ | Haertner | Round 5: Siebenhaar, Erich - Haertner, Helmut, Dr. | Nimzo-Larsen Attack | |
| Sep 6, 2024 | Kalepky | ½–½ | Siebenhaar | Round 4: Kalepky, Helmut - Siebenhaar, Erich | Alekhine Defense: Maróczy Variation | |
| Sep 5, 2024 | Siebenhaar | ½–½ | Kripp | Round 3: Siebenhaar, Erich - Kripp, Wolfgang | Rapport-Jobava System | |
| Sep 4, 2024 | Richter | ½–½ | Siebenhaar | Round 2: Richter, Gerald - Siebenhaar, Erich | Horwitz Defense | |
| Sep 3, 2024 | Siebenhaar | 1–0 | Duijker | Round 1: Siebenhaar, Erich - Duijker, Bert | Nimzo-Larsen Attack: Indian Variation | |
| Sep 13, 2023 | Siebenhaar | ½–½ | Hassenrueck | 20. RLP-Senioren-Open | Rapport-Jobava System | |
| Sep 12, 2023 | Siebenhaar | ½–½ | Schrems | 20. RLP-Senioren-Open | Rapport-Jobava System | |
| Sep 11, 2023 | Paus | 0–1 | Siebenhaar | 20. RLP-Senioren-Open | Modern Defense: Standard Defense | |
| Sep 10, 2023 | Siebenhaar | ½–½ | Lares | 20. RLP-Senioren-Open | Van Geet Opening: Novosibirsk Variation | |
| Sep 9, 2023 | Duijker | 0–1 | Siebenhaar | 20. RLP-Senioren-Open | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| Sep 8, 2023 | Siebenhaar | 0–1 | Krueger | 20. RLP-Senioren-Open | Queen's Pawn Game: Barry Attack, Grünfeld Variation | |
| Sep 7, 2023 | Polster | ½–½ | Siebenhaar | 20. RLP-Senioren-Open | Alekhine Defense: Balogh Variation | |
| Sep 6, 2023 | Siebenhaar | 1–0 | Hiller | 20. RLP-Senioren-Open | Rubinstein Opening: Bogoljubow Defense | |
| Sep 5, 2023 | Schwab | 0–1 | Siebenhaar | 20. RLP-Senioren-Open | Queen's Pawn Game: Modern Defense | |
| — | Siebenhaar | 1–0 | Rokitta | Round 1: Siebenhaar, Erich - Rokitta, Uwe | Sicilian Defense: Mengarini Variation | |
| — | Siebenhaar | 1–0 | Bruziks | Round 3: Siebenhaar, Erich - Bruziks, George | Nimzo-Larsen Attack: Modern Variation | |
| — | Siebenhaar | 1–0 | Hurst | Round 6: Siebenhaar, Erich - Hurst, Peter | Scandinavian Defense: Main Line | |
| — | Siebenhaar | ½–½ | Mueller | Round 8: Siebenhaar, Erich - Mueller, Erich | Pirc Defense | |
| — | Haertner | ½–½ | Siebenhaar | Round 2: Haertner, Helmut, Dr. - Siebenhaar, Erich | Queen's Pawn Game | |
| — | Okrajek | ½–½ | Siebenhaar | Round 4: Okrajek, Alexander - Siebenhaar, Erich | Nimzo-Larsen Attack: Classical Variation | |
| — | Rodgaard | ½–½ | Siebenhaar | Round 5: Rodgaard, John - Siebenhaar, Erich | English Opening | |
| — | Heck | ½–½ | Siebenhaar | Round 7: Heck, Norbert - Siebenhaar, Erich | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| — | Hassenrueck | 1–0 | Siebenhaar | Round 9: Hassenrueck, Helmut - Siebenhaar, Erich | Semi-Slav Defense: Meran Variation, Wade Variation | |
