| Dec 3, 2023 | Tudor-Vlad Sfarlog | ½–½ | Alexandru Costin | Round 8: Tudor-Vlad Sfarlog - Alexandru Costin | Réti Opening | |
| Dec 3, 2023 | Beniamin-Ephraim Damian | 0–1 | Alexandru Costin | Round 7: Beniamin-Ephraim Damian - Alexandru Costin | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Dec 3, 2023 | Alexandru Costin | 0–1 | Adrian-Simion Secheres | Round 6: Alexandru Costin - Adrian-Simion Secheres | Zukertort Opening: Kingside Fianchetto | |
| Dec 3, 2023 | Alexandru Costin | 1–0 | Andrei Nicola | Round 5: Alexandru Costin - Andrei Nicola | French Defense: Steiner Variation | |
| Dec 3, 2023 | Mihai-Dragos Vesa | 0–1 | Alexandru Costin | Round 4: Mihai-Dragos Vesa - Alexandru Costin | Semi-Slav Defense: Noteboom Variation | |
| Dec 3, 2023 | Alexandru Costin | 0–1 | Filip Magold | Round 3: Alexandru Costin - Filip Magold | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Dec 3, 2023 | Ianis-Mihai Tarciuc | 0–1 | Alexandru Costin | Round 2: Ianis-Mihai Tarciuc - Alexandru Costin | Hungarian Opening: Slav Formation | |
| Dec 3, 2023 | Alexandru Costin | 0–1 | David Gavrilescu | Round 1: Alexandru Costin - David Gavrilescu | Queen's Gambit Declined: Barmen Variation | |
| Dec 2, 2023 | Hunor-Zoltan Antal | 1–0 | Alexandru Costin | Round 8: Hunor-Zoltan Antal - Alexandru Costin | Sicilian Defense: Mengarini Variation | |
| Dec 2, 2023 | Alexandru Costin | 0–1 | Razvan Teodorescu | Round 7: Alexandru Costin - Razvan Teodorescu | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Dec 2, 2023 | Alexandru Costin | ½–½ | Alin Stingu | Round 6: Alexandru Costin - Alin Stingu | Tarrasch Defense: Classical Variation, Advance Variation | |
| Dec 2, 2023 | Mircea-Emilian Parligras | 1–0 | Alexandru Costin | Round 5: Mircea-Emilian Parligras - Alexandru Costin | Semi-Slav Defense: Main Line | |
| Dec 2, 2023 | Pavel-Alexandru Nastore | ½–½ | Alexandru Costin | Round 2: Pavel-Alexandru Nastore - Alexandru Costin | Indian Defense: Knights Variation | |
| Dec 2, 2023 | Alexandru Costin | 0–1 | Andrei Matei-Catruna | Round 1: Alexandru Costin - Andrei Matei-Catruna | Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order Accepted | |
| Dec 2, 2023 | Doru Jiros | 0–1 | Alexandru Costin | Round 4: Doru Jiros - Alexandru Costin | Zukertort Opening | |
| Dec 2, 2023 | Alexandru Costin | 1–0 | Brianna-Delena Muntean | Round 3: Alexandru Costin - Brianna-Delena Muntean | Italian Game: Scotch Invitation Declined | |
| Dec 1, 2023 | Alexandru Costin | 1–0 | David Cordea | Round 10: Alexandru Costin - David Cordea | Owen Defense | |
| Dec 1, 2023 | Ion-Valentin Vaduva | 0–1 | Alexandru Costin | Round 9: Ion-Valentin Vaduva - Alexandru Costin | Caro-Kann Defense: Euwe Attack | |
| Dec 1, 2023 | Alexandru Costin | 0–1 | Matei Zlate-Ion | Round 8: Alexandru Costin - Matei Zlate-Ion | English Opening: Anglo-Grünfeld Defense | |
| Dec 1, 2023 | Ioan-Radu Dima | 1–0 | Alexandru Costin | Round 7: Ioan-Radu Dima - Alexandru Costin | Queen's Pawn Game: Zukertort Variation | |
| Dec 1, 2023 | Alexandru Costin | 0–1 | Costica-Ciprian Nanu | Round 6: Alexandru Costin - Costica-Ciprian Nanu | Indian Defense: Knights Variation | |
| Dec 1, 2023 | David-Alexandru Harabor | 0–1 | Alexandru Costin | Round 5: David-Alexandru Harabor - Alexandru Costin | Caro-Kann Defense: Exchange Variation | |
| Dec 1, 2023 | David Saioc | 0–1 | Alexandru Costin | Round 4: David Saioc - Alexandru Costin | King's Indian Attack | |
| Dec 1, 2023 | Alexandru Costin | 1–0 | Andrei Cazan | Round 3: Alexandru Costin - Andrei Cazan | Modern Defense: Standard Defense | |
| Dec 1, 2023 | Armand Veress | 1–0 | Alexandru Costin | Round 2: Armand Veress - Alexandru Costin | Bogo-Indian Defense: Grünfeld Variation | |
| Dec 1, 2023 | Alexandru Costin | 1–0 | Andrei-Stefan Sandu | Round 1: Alexandru Costin - Andrei-Stefan Sandu | French Defense: Exchange Variation | |
| Nov 5, 2023 | Andrei-Cristian Bulau | 1–0 | Alexandru Costin | Round 10: Andrei-Cristian Bulau - Alexandru Costin | Semi-Slav Defense: Chigorin Defense | |
| Nov 5, 2023 | Alexandru Costin | 1–0 | Teodor-Cosmin Nedelcu | Round 9: Alexandru Costin - Teodor-Cosmin Nedelcu | English Opening: Symmetrical Variation | |
| Nov 5, 2023 | Alexandru Costin | 0–1 | Lucian-Ioan Filip | Round 7: Alexandru Costin - Lucian-Ioan Filip | Sicilian Defense: Smith-Morra Gambit Accepted | |
| Nov 5, 2023 | Robert-Ionut Creanga | ½–½ | Alexandru Costin | Round 6: Robert-Ionut Creanga - Alexandru Costin | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Nov 5, 2023 | Alexandru Costin | ½–½ | Adrian-Simion Secheres | Round 5: Alexandru Costin - Adrian-Simion Secheres | Indian Defense: Przepiorka Variation | |
| Nov 4, 2023 | George-Catalin Ardelean | 1–0 | Alexandru Costin | Round 2: George-Catalin Ardelean - Alexandru Costin | Caro-Kann Defense: Exchange Variation | |
| Jul 22, 2023 | Michalis Papadakis | 0–1 | Alexandru Costin | Round 9: Michalis Papadakis - Alexandru Costin | Queen's Pawn Game: Zukertort Variation | |
| Jul 21, 2023 | Alexandru Costin | ½–½ | Alin Ardeleanu | Round 8: Alexandru Costin - Alin Ardeleanu | Pirc Defense | |
| Jul 20, 2023 | Andrei-Cristian Bulau | ½–½ | Alexandru Costin | Round 7: Andrei-Cristian Bulau - Alexandru Costin | Caro-Kann Defense: Endgame Variation | |
| Jul 19, 2023 | Alexandru Costin | ½–½ | Anna Kubicka | Round 6: Alexandru Costin - Anna Kubicka | Sicilian Defense: Smith-Morra Gambit Accepted, Scheveningen Formation | |
| Jul 19, 2023 | Pavel-Alexandru Nastore | ½–½ | Alexandru Costin | Round 5: Pavel-Alexandru Nastore - Alexandru Costin | Caro-Kann Defense: Classical Variation, Spassky Variation | |
| Jul 18, 2023 | Alexandru Costin | 1–0 | Guy Levin | Round 4: Alexandru Costin - Guy Levin | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Jul 17, 2023 | Alexandru Costin | 1–0 | Alexandru-Vasile David | Round 2: Alexandru Costin - Alexandru-Vasile David | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Apr 10, 2023 | Cristian-Stefan Serban | ½–½ | Alexandru Costin | Round 1: Cristian-Stefan Serban - Alexandru Costin | Queen's Gambit Declined | |