TCh-POL Ekstraliga 2023 Lublin POL· Sep 18 – 26, 2023 | Sep 18 – 26, 2023 | Classical | 70 | 2501 | 295 |
| FICGS__CHESS__CLASS_M__000128FICGS· Sep 25, 2023 | Sep 25, 2023 | Classical | 7 | 2211 | 21 |
| JSM 1 div. 2023/24Kuopio· Sep 24, 2023 | Sep 24, 2023 | Classical | 14 | 1932 | 7 |
| JSM 1 div. 2023/24Joensuu· Sep 23 – 24, 2023 | Sep 23 – 24, 2023 | Classical | 26 | 1964 | 16 |
Forcing Moves First Summer-3 Open Mississauga CAN· Sep 23 – 24, 2023 | Sep 23 – 24, 2023 | Classical | 10 | 1662 | 13 |
TCh-ESP Rapid 2023 Ubeda ESP· Sep 23 – 24, 2023 | Sep 23 – 24, 2023 | Rapid | 121 | 2118 | 271 |
28. Palermo Open 2023 Palermo ITA· Sep 21 – 24, 2023 | Sep 21 – 24, 2023 | Classical | 17 | 2065 | 17 |
Caissa Hotel Chestnut Gp Ayvalik TUR· Sep 18 – 23, 2023 | Sep 18 – 23, 2023 | Classical | 13 | 2305 | 59 |
| FICGS__CHESS__CLASS_A__000273FICGS· Sep 23, 2023 | Sep 23, 2023 | Classical | 8 | 2146 | 24 |
exe Slovakia Open 2023 Bratislava SVK· Sep 15 – 23, 2023 | Sep 15 – 23, 2023 | Classical | 93 | 1922 | 335 |
I ch-Sudamericano women Lima PER· Sep 14 – 22, 2023 | Sep 14 – 22, 2023 | Classical | 30 | 1602 | 90 |
TCh-ESP Div Honor 2023 Linares ESP· Sep 16 – 22, 2023 | Sep 16 – 22, 2023 | Classical | 54 | 2555 | 170 |
I ch-Sudamericano 2023 Lima PER· Sep 14 – 22, 2023 | Sep 14 – 22, 2023 | Classical | 112 | 1710 | 304 |
| FICGS__CHESS__RAPID_M__000150FICGS· Sep 22, 2023 | Sep 22, 2023 | Classical | 7 | 2186 | 21 |
Panchenko Mem Open A 2023 Chelyabinsk RUS· Sep 11 – 20, 2023 | Sep 11 – 20, 2023 | Classical | 45 | 2026 | 98 |
| FICGS__CHESS__RAPID_C__000299FICGS· Sep 17, 2023 | Sep 17, 2023 | Classical | 7 | 1589 | 6 |
| We Jarvenpaa· Sep 16 – 17, 2023 | Sep 16 – 17, 2023 | Classical | 12 | 1899 | 19 |
SixDays Budapest Sept IM Budapest HUN· Sep 12 – 17, 2023 | Sep 12 – 17, 2023 | Classical | 10 | 2271 | 44 |
| 13. Papanastasio Open· Sep 11 – 17, 2023 | Sep 11 – 17, 2023 | Classical | 21 | 1484 | 26 |
SixDays Budapest Sept GM Budapest HUN· Sep 12 – 17, 2023 | Sep 12 – 17, 2023 | Classical | 10 | 2390 | 43 |
ITT Comodoro Rivadavia Comodoro Rivadavia ARG· Sep 12 – 17, 2023 | Sep 12 – 17, 2023 | Classical | 12 | 2157 | 62 |
Texas Collegiate Finals Brownsville USA· Sep 16 – 17, 2023 | Sep 16 – 17, 2023 | Classical | 28 | 2322 | 48 |
I ch-Sudamericano Rapid Lima PER· Sep 16 – 17, 2023 | Sep 16 – 17, 2023 | Rapid | 29 | 2088 | 66 |
Kvibergspelen Open 2023 Goteborg SWE· Sep 15 – 17, 2023 | Sep 15 – 17, 2023 | Classical | 91 | 2027 | 163 |
Szansa Open Rapid 2023 Warsaw POL· Sep 17, 2023 | Sep 17, 2023 | Rapid | 96 | 2001 | 200 |
Mindsports Super Swiss London ENG· Sep 13 – 17, 2023 | Sep 13 – 17, 2023 | Classical | 33 | 2290 | 132 |
Caissa Hotel Walnut Gp Ayvalik TUR· Sep 11 – 16, 2023 | Sep 11 – 16, 2023 | Classical | 13 | 2366 | 59 |
Szansa Open Blitz 2023 Warsaw POL· Sep 16, 2023 | Sep 16, 2023 | Blitz | 98 | 2080 | 287 |
Asian Junior Girls 2023 Jamshedpur IND· Sep 9 – 15, 2023 | Sep 9 – 15, 2023 | Classical | 51 | 1655 | 143 |
Asian Juniors 2023 Jamshedpur IND· Sep 9 – 15, 2023 | Sep 9 – 15, 2023 | Classical | 60 | 2023 | 237 |
| European Youth O-16· Sep 5 – 14, 2023 | Sep 5 – 14, 2023 | Classical | 11 | 2238 | 9 |
| European Youth O-14· Sep 5 – 14, 2023 | Sep 5 – 14, 2023 | Classical | 18 | 2094 | 15 |
31. EY Girls U18 2023 Mamaia ROU· Sep 5 – 14, 2023 | Sep 5 – 14, 2023 | Classical | 34 | 1925 | 72 |
31. EY Open U18 2023 Mamaia ROU· Sep 5 – 14, 2023 | Sep 5 – 14, 2023 | Classical | 52 | 2283 | 96 |
FSIM September 2023 Budapest HUN· Sep 2 – 12, 2023 | Sep 2 – 12, 2023 | Classical | 11 | 2233 | 54 |
FSGM September 2023 Budapest HUN· Sep 2 – 12, 2023 | Sep 2 – 12, 2023 | Classical | 11 | 2400 | 53 |
Women's World Teams Final Bydgoszcz POL· Sep 9 – 11, 2023 | Sep 9 – 11, 2023 | Classical | 39 | 2309 | 72 |
| FICGS__CHESS__RAPID_B__000392FICGS· Sep 11, 2023 | Sep 11, 2023 | Classical | 8 | 1834 | 24 |
| Etvas M Helsinki· Sep 8 – 10, 2023 | Sep 8 – 10, 2023 | Classical | 5 | 2022 | 10 |
Oebro Weekend - Mester 3 Copenhagen DEN· Sep 8 – 10, 2023 | Sep 8 – 10, 2023 | Classical | 6 | 2021 | 12 |
| We Pori 2023· Sep 9 – 10, 2023 | Sep 9 – 10, 2023 | Classical | 5 | 2046 | 6 |
| Hull 4NCL Congress 2023Canham Turner Centre, Hull HU6 7RX· Sep 8 – 10, 2023 | Sep 8 – 10, 2023 | Classical | 22 | 1591 | 23 |
Oebro Weekend - Mester 1 Copenhagen DEN· Sep 8 – 10, 2023 | Sep 8 – 10, 2023 | Classical | 7 | 2242 | 20 |
Festugeturneringen 2023 Mester Aarhus DEN· Sep 8 – 10, 2023 | Sep 8 – 10, 2023 | Classical | 6 | 1968 | 15 |
Oebro Weekend - kvinde DM Copenhagen DEN· Sep 8 – 10, 2023 | Sep 8 – 10, 2023 | Classical | 7 | 1885 | 20 |
Kurnosov Mem Rapid 2023 Chelyabinsk RUS· Sep 8 – 10, 2023 | Sep 8 – 10, 2023 | Rapid | 67 | 2129 | 109 |
Excelsior Sept Open 2023 Toronto CAN· Sep 6 – 10, 2023 | Sep 6 – 10, 2023 | Classical | 15 | 2149 | 49 |
| Hull 4NCL CongressCanham Turner Centre· Sep 8 – 10, 2023 | Sep 8 – 10, 2023 | Classical | 60 | 1912 | 115 |
Wuerttemberg IMT 2023 Lichtenstein GER· Sep 2 – 10, 2023 | Sep 2 – 10, 2023 | Classical | 10 | 2386 | 45 |
Saint Charbel Cup 2023 Morshyn UKR· Sep 5 – 10, 2023 | Sep 5 – 10, 2023 | Classical | 10 | 2398 | 45 |