| Jun 10, 2026 | Pancu | 1–0 | Kierzek | Round 9: Pancu, Aureliana-Eugenia - Kierzek, Mira | Queen's Pawn Game: London System | |
| Jun 9, 2026 | Kierzek | 1–0 | Chiapponi | Round 8: Kierzek, Mira - Chiapponi, Paola | English Opening: Mikenas-Carls Variation | |
| Jun 8, 2026 | Jicman | ½–½ | Kierzek | Round 7: Jicman, Ligia-Letitia - Kierzek, Mira | Petrov's Defense: Classical Attack, Staunton Variation | |
| Jun 7, 2026 | Birkholz | 0–1 | Kierzek | Round 6: Birkholz, Olga - Kierzek, Mira | Queen's Pawn Game: London System | |
| Jun 6, 2026 | Kierzek | 1–0 | Piquemal | Round 5: Kierzek, Mira - Piquemal, Christiane | Zukertort Opening: Kingside Fianchetto | |
| Jun 5, 2026 | Baliuniene | ½–½ | Kierzek | Round 4: Baliuniene, Margarita - Kierzek, Mira | Bogo-Indian Defense: Grünfeld Variation | |
| Jun 4, 2026 | Kierzek | ½–½ | Orel Music | Round 3: Kierzek, Mira - Orel Music, Simona | Semi-Slav Defense: Bogoljubow Variation | |
| Jun 3, 2026 | Krasenkowa | 1–0 | Kierzek | Round 2: Krasenkowa, Elena - Kierzek, Mira | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit | |
| Jun 1, 2026 | Kierzek | 1–0 | Gaprindashvili | Round 1: Kierzek, Mira - Gaprindashvili, Nona | Modern Defense | |
| Nov 1, 2025 | Kierzek | ½–½ | Khropova | Round 11: Kierzek, Mira - Khropova, Larisa | Queen's Gambit Declined: Three Knights Variation | |
| Oct 31, 2025 | Altantsetseg | 0–1 | Kierzek | Round 10: Altantsetseg, Namsraijav - Kierzek, Mira | Sicilian Defense: Closed, Traditional | |
| Oct 29, 2025 | Bogumil | ½–½ | Kierzek | Round 8: Bogumil, Tatiana - Kierzek, Mira | Caro-Kann Defense: Exchange Variation | |
| Oct 28, 2025 | Kierzek | ½–½ | Tsifanskaya | Round 7: Kierzek, Mira - Tsifanskaya, Ludmila A | King's Indian Attack: Symmetrical Defense | |
| Oct 23, 2025 | Kierzek | 0–1 | Makropoulou | Round 3: Kierzek, Mira - Makropoulou, Marina | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Oct 22, 2025 | Piquemal | 1–0 | Kierzek | Round 2: Piquemal, Christiane - Kierzek, Mira | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Oct 20, 2025 | Kierzek | 0–1 | Strutinskaia | Round 9: Kierzek, Mira - Strutinskaia, Galina | Kangaroo Defense | |
| Nov 28, 2024 | Kierzek | 0–1 | Bogumil | World Senior Chess Championship 2024 | Marienbad System | |
| Nov 22, 2024 | Kierzek | 0–1 | Khropova | World Senior Chess Championship 2024 | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation | |
| Nov 20, 2024 | Strutinskaia | 1–0 | Kierzek | World Senior Chess Championship 2024 | Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation | |
| Nov 19, 2024 | Folkova | ½–½ | Kierzek | World Senior Chess Championship 2024 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Nov 17, 2024 | Klinova | 1–0 | Kierzek | World Senior Chess Championship 2024 | Scandinavian Defense: Modern Variation, Gipslis Variation | |
| Oct 26, 2024 | Chevelevitch | 1–0 | Kierzek | Round 1: Chevelevitch, Evgueni, Dr. - Kierzek, Mira | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Aug 28, 2024 | Kierzek | 0–1 | Nehmert | Round 6: Kierzek, Mira - Nehmert, Ulrich | East Indian Defense | |
| Aug 25, 2024 | Buchal | 1–0 | Kierzek | Round 3: Buchal, Stephan - Kierzek, Mira | English Opening: King's English Variation | |
| May 7, 2024 | Kierzek | 0–1 | Baker | European Senior Team Chess Championship 2024 - Section 65 + | Indian Defense: Przepiorka Variation | |
| Oct 29, 2023 | Tereladze | 1–0 | Kierzek | World Senior Women's Championship | Petrov's Defense: Modern Attack, Center Variation | |
| Oct 26, 2023 | Kierzek | * | Sosnowska | World Senior Women's Championship | ? | |
| Oct 25, 2023 | Gaprindashvili | 1–0 | Kierzek | World Senior Women's Championship | Slav Defense: Exchange Variation | |
| Jul 20, 2023 | Kierzek | 1–0 | Spanton | European Senior Team Chess Championship 2023 65+ | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Jul 19, 2023 | Daleczko | 0–1 | Kierzek | European Senior Team Chess Championship 2023 65+ | Scandinavian Defense: Modern Variation | |
| Jul 18, 2023 | Kierzek | ½–½ | Wood | European Senior Team Chess Championship 2023 65+ | Benoni Defense: Fianchetto Variation | |
| Jul 17, 2023 | Kierzek | 1–0 | Novak | European Senior Team Chess Championship 2023 65+ | Zukertort Opening: Polish Defense | |
| Jul 16, 2023 | Czajkowski | 1–0 | Kierzek | European Senior Team Chess Championship 2023 65+ | Slav Defense: Quiet Variation, Schallopp Defense | |
| Jul 15, 2023 | Mortensen | 0–1 | Kierzek | European Senior Team Chess Championship 2023 65+ | Indian Defense: Anti-Nimzo-Indian | |
| Jul 14, 2023 | Kierzek | 0–1 | Gasik | European Senior Team Chess Championship 2023 65+ | Dutch Defense: Leningrad Variation, Warsaw Variation | |
| Jul 13, 2023 | Davis | ½–½ | Kierzek | European Senior Team Chess Championship 2023 65+ | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Jul 12, 2023 | Kierzek | 0–1 | Lanc | European Senior Team Chess Championship 2023 65+ | Pirc Defense: Classical Variation, Schlechter Variation | |
| Jun 2, 2023 | Both | 0–1 | Kierzek | escc2023_65 | Queen's Gambit Declined: Modern Variation, Normal Line | |
| May 28, 2023 | Kierzek | 0–1 | Fernandez Garcia | escc2023_65 | Queen's Pawn Game: Colle System | |
| May 27, 2023 | Madebrink | ½–½ | Kierzek | escc2023_65 | Queen's Pawn Game: Symmetrical Variation | |
| Nov 15, 2022 | Fernandez Garcia | 1–0 | Kierzek | 30th World Senior Chess Championship 2022 | Lion Defense: Anti-Philidor, Lion's Cave | |
| Sep 6, 2021 | Kierzek | ½–½ | Malmdin | estcc 65 | Marienbad System | |
| Sep 5, 2021 | Postler | 1–0 | Kierzek | estcc 65 | Caro-Kann Defense: Tartakower Variation | |
| Sep 4, 2021 | Segal | 0–1 | Kierzek | estcc 65 | Slav Defense: Exchange Variation | |
| Sep 3, 2021 | Kierzek | 1–0 | Kundt | estcc 65 | King's Indian Attack | |
| Sep 2, 2021 | Kierzek | 0–1 | Dalling | estcc 65 | Queen's Pawn Game: Symmetrical Variation | |
| Sep 1, 2021 | Kierzek | 0–1 | Holst | estcc 65 | Yusupov-Rubinstein System | |
| Aug 31, 2021 | Kierzek | 1–0 | Becvar | estcc 65 | English Opening: Agincourt Defense | |
| Aug 30, 2021 | Hausner | ½–½ | Kierzek | estcc 65 | English Opening: King's English Variation, Four Knights Variation | |