| Apr 4, 2026 | Sievers | 1–0 | Willems | Runde 9: Sievers, Andy - Willems, Lasse | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Apr 3, 2026 | Baier | ½–½ | Sievers | Runde 8: Baier, Philip - Sievers, Andy | Sicilian Defense: Closed | |
| Apr 3, 2026 | Sievers | ½–½ | Leiser | Runde 7: Sievers, Andy - Leiser, Joachim | King's Indian Attack: Symmetrical Defense | |
| Apr 2, 2026 | Henkel | 0–1 | Sievers | Runde 5: Henkel, Ralf - Sievers, Andy | ? | |
| Mar 29, 2026 | Sievers | 1–0 | Lebershausen | Runde 4: Sievers, Andy - Lebershausen, Max | King's Indian Attack, with e6 | |
| Mar 29, 2026 | Slany | ½–½ | Sievers | Runde 3: Slany, Ralph - Sievers, Andy | Sicilian Defense: Snyder Variation | |
| Mar 27, 2026 | Wilk | 0–1 | Sievers | Runde 6: Wilk, Jan - Sievers, Andy | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Mar 27, 2026 | Sievers | ½–½ | Feith | Runde 2: Sievers, Andy - Feith, Bernhard, Dr. | Zukertort Opening: Queen's Gambit Invitation | |
| Mar 27, 2026 | Hirschinger | 0–1 | Sievers | Runde 1: Hirschinger, Thomas - Sievers, Andy | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| Apr 19, 2025 | Müller | 1–0 | Sievers | 92. Pfälzischer Schachkongress | ? | |
| Apr 18, 2025 | Sievers | 0–1 | Louis | 92. Pfälzischer Schachkongress | ? | |
| Apr 18, 2025 | Kaufhold | 1–0 | Sievers | 92. Pfälzischer Schachkongress | ? | |
| Apr 17, 2025 | Sievers | 0–1 | Huschens | 92. Pfälzischer Schachkongress | ? | |
| Apr 17, 2025 | Sievers | 0–1 | Agne | 92. Pfälzischer Schachkongress | ? | |
| Apr 13, 2025 | Sievers | 1–0 | Kuhn | 92. Pfälzischer Schachkongress | ? | |
| Apr 13, 2025 | Lauer | 1–0 | Sievers | 92. Pfälzischer Schachkongress | ? | |
| Apr 12, 2025 | Wacker | 0–1 | Sievers | 92. Pfälzischer Schachkongress | ? | |
| Apr 11, 2025 | Sievers | 0–1 | Lambert | 92. Pfälzischer Schachkongress | Caro-Kann Defense: Tartakower Variation | |
| Mar 30, 2024 | Sievers | 1–0 | Karpa | Runde 9: Sievers, Andy - Karpa, Adrian | ? | |
| Mar 29, 2024 | Martin | ½–½ | Sievers | Runde 8: Martin, Mike - Sievers, Andy | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Mar 29, 2024 | Sievers | ½–½ | Huseynov | Runde 7: Sievers, Andy - Huseynov, Ahad | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Mar 28, 2024 | Mueller | ½–½ | Sievers | Runde 6: Mueller, Markus - Sievers, Andy | Sicilian Defense: Moscow Variation, Sokolsky Variation | |
| Mar 28, 2024 | Sievers | ½–½ | Louis | Runde 5: Sievers, Andy - Louis, Volker | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Mar 24, 2024 | Scherer | 0–1 | Sievers | Runde 4: Scherer, Josua - Sievers, Andy | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Mar 24, 2024 | Sievers | 1–0 | Lambert | Runde 3: Sievers, Andy - Lambert, Andreas | Caro-Kann Defense: Tartakower Variation | |
| Mar 23, 2024 | Gypser | 1–0 | Sievers | Runde 2: Gypser, Andreas, Dr. - Sievers, Andy | Sicilian Defense: Chekhover Variation | |
| Mar 22, 2024 | Sievers | ½–½ | Huschens | Runde 1: Sievers, Andy - Huschens, Matthias | French Defense: Tarrasch Variation, Morozevich Variation | |
| May 28, 2023 | Sievers | * | Swijsen | Limburg Open | ? | |
| May 28, 2023 | Honkoop | * | Sievers | Limburg Open | ? | |
| — | Sievers | 0–1 | De Winter | HZ University of Applied Sciences Chess Tournament | Caro-Kann Defense: Advance Variation, Tal Variation | |
| — | Sievers | 0–1 | Beukema | HZ University of Applied Sciences Chess Tournament | Scotch Game: Cochrane-Shumov Defense | |
