| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1501. M Kravtsiv vs A Kosten |
| 1-0 | 20 | 2018 | 16th Cap D'Agde Open | E20 Nimzo-Indian |
| 1502. F Guilleux vs A Kosten |
| 1-0 | 49 | 2019 | 15th Vandoeuvre Open | E11 Bogo-Indian Defense |
| 1503. Fedorov vs A Kosten |
| 1-0 | 59 | 2019 | TCh-FRA Top 12 | C26 Vienna |
| 1504. A Kosten vs H Hamdouchi |
| ½-½ | 44 | 2019 | TCh-FRA Top 12 | B72 Sicilian, Dragon |
| 1505. Fressinet vs A Kosten |
| ½-½ | 35 | 2019 | TCh-FRA Top 12 | C01 French, Exchange |
| 1506. A Kosten vs V Hamitevici |
| ½-½ | 59 | 2019 | TCh-FRA Top 12 | A15 English |
| 1507. G Oparin vs A Kosten |
| 1-0 | 54 | 2019 | TCh-FRA Top 12 | E11 Bogo-Indian Defense |
| 1508. A Kosten vs Fedorchuk |
| 0-1 | 67 | 2019 | TCh-FRA Top 12 | A13 English |
| 1509. S Cossin vs A Kosten |
| 1-0 | 51 | 2019 | TCh-FRA Top 12 | A50 Queen's Pawn Game |
| 1510. A Kosten vs H Stevic |
| 0-1 | 33 | 2019 | TCh-FRA Top 12 | A09 Reti Opening |
| 1511. S Bressac vs A Kosten |
| 1-0 | 42 | 2019 | TCh-FRA Top 12 | C48 Four Knights |
| 1512. S Collins vs A Kosten |
| 1-0 | 35 | 2020 | Irish New Year Norm GM | C87 Ruy Lopez |
| 1513. A Kosten vs J L Pajeken |
| ½-½ | 44 | 2020 | Irish New Year Norm GM | A06 Reti Opening |
| 1514. H Li vs A Kosten |
| ½-½ | 21 | 2020 | Irish New Year Norm GM | C78 Ruy Lopez |
| 1515. A Kosten vs D Fitzsimons |
| 0-1 | 26 | 2020 | Irish New Year Norm GM | A15 English |
| 1516. S Brady vs A Kosten |
| ½-½ | 43 | 2020 | Irish New Year Norm GM | C53 Giuoco Piano |
| 1517. M J Turner vs A Kosten |
| 1-0 | 42 | 2020 | Irish New Year Norm GM | C67 Ruy Lopez |
| 1518. A Kosten vs N Pert |
| ½-½ | 33 | 2020 | Irish New Year Norm GM | A20 English |
| 1519. A A Lopez vs A Kosten |
| 1-0 | 57 | 2020 | Irish New Year Norm GM | E11 Bogo-Indian Defense |
| 1520. A Kosten vs J Ryan |
| 1-0 | 41 | 2020 | Irish New Year Norm GM | D02 Queen's Pawn Game |
Kibitzing
