| Youth World Cup U18 KOTornelo INT· Aug 26 – 30, 2021 | Aug 26 – 30, 2021 | Classical | 16 | 2298 | 35 |
Northumbria Masters 2021 Newcastle ENG· Aug 26 – 30, 2021 | Aug 26 – 30, 2021 | Classical | 71 | 2015 | 195 |
Northumbria Masters GM Newcastle ENG· Aug 26 – 30, 2021 | Aug 26 – 30, 2021 | Classical | 10 | 2434 | 45 |
Northumbria Masters IM Newcastle ENG· Aug 26 – 30, 2021 | Aug 26 – 30, 2021 | Classical | 10 | 2297 | 45 |
8. Vezerkepzo IM 2021 Budapest HUN· Aug 21 – 29, 2021 | Aug 21 – 29, 2021 | Classical | 18 | 2220 | 86 |
| We Helsinki 2021· Aug 28 – 29, 2021 | Aug 28 – 29, 2021 | Classical | 8 | 2029 | 9 |
TCh-FRA Top 12 w Final Cesson-Sevigne FRA· Aug 28 – 29, 2021 | Aug 28 – 29, 2021 | Classical | 30 | 2047 | 29 |
| U20 Greek Junior Championship· Aug 23 – 29, 2021 | Aug 23 – 29, 2021 | Classical | 48 | 1707 | 105 |
| FICGS__CHESS__THEMATIC_TOURNAMENT__000247FICGS· Aug 29, 2021 | Aug 29, 2021 | Classical | 8 | 1752 | 17 |
CRO Ch w 2021 Vinkovci CRO· Aug 22 – 29, 2021 | Aug 22 – 29, 2021 | Classical | 14 | 1908 | 48 |
Skalica Masters 2021 Skalica SVK· Aug 21 – 29, 2021 | Aug 21 – 29, 2021 | Classical | 10 | 2489 | 45 |
8. Vezerkepzo GM 2021 Budapest HUN· Aug 21 – 29, 2021 | Aug 21 – 29, 2021 | Classical | 10 | 2396 | 44 |
Skalica Open 2021 Skalica SVK· Aug 21 – 29, 2021 | Aug 21 – 29, 2021 | Classical | 67 | 2089 | 295 |
Guimaraes Open 2021 Guimaraes POR· Aug 24 – 29, 2021 | Aug 24 – 29, 2021 | Classical | 151 | 2144 | 228 |
38. Collado Villalba Op Collado Villalba ESP· Aug 21 – 29, 2021 | Aug 21 – 29, 2021 | Classical | 96 | 1670 | 246 |
Sergiy Shystariov Blitz Kiev UKR· Aug 29, 2021 | Aug 29, 2021 | Blitz | 40 | 2271 | 75 |
| T181-B06LSS· Aug 25 – 28, 2021 | Aug 25 – 28, 2021 | Classical | 5 | 1535 | 18 |
| FICGS__CHESS__CLASS_B__000345FICGS· Aug 28, 2021 | Aug 28, 2021 | Classical | 7 | 1914 | 14 |
Sergiy Shystariov Rapid Kiev UKR· Aug 28, 2021 | Aug 28, 2021 | Rapid | 41 | 2289 | 58 |
Sevastopol Waltz Blitz Sevastopol UKR· Aug 28, 2021 | Aug 28, 2021 | Blitz | 34 | 2017 | 113 |
5. Innsbruck Open 2021 Innsbruck AUT· Aug 21 – 28, 2021 | Aug 21 – 28, 2021 | Classical | 143 | 2158 | 436 |
| RA-00687LSS· Aug 21 – 27, 2021 | Aug 21 – 27, 2021 | Classical | 7 | 2085 | 21 |
| Nopea shakki Helsinki 2021· Aug 27, 2021 | Aug 27, 2021 | Classical | 6 | 2027 | 8 |
TCh-FRA Top 12 w GpA Cesson-Sevigne FRA· Aug 26 – 27, 2021 | Aug 26 – 27, 2021 | Classical | 17 | 1978 | 21 |
28. Nikaia Open Nikaia GRE· Aug 21 – 27, 2021 | Aug 21 – 27, 2021 | Classical | 39 | 1880 | 56 |
Sevastopol Waltz Rapid Sevastopol UKR· Aug 26 – 27, 2021 | Aug 26 – 27, 2021 | Rapid | 41 | 1955 | 89 |
TCh-FRA Top 12 w GpB Cesson-Sevigne FRA· Aug 26 – 27, 2021 | Aug 26 – 27, 2021 | Classical | 16 | 2095 | 24 |
8. Sinquefield Cup 2021 Saint Louis USA· Aug 17 – 26, 2021 | Aug 17 – 26, 2021 | Classical | 10 | 2742 | 44 |
Ciutat de Barcelona A Barcelona ESP· Aug 18 – 26, 2021 | Aug 18 – 26, 2021 | Classical | 55 | 2288 | 103 |
ch-CAT 2021 Barcelona ESP· Aug 18 – 26, 2021 | Aug 18 – 26, 2021 | Classical | 10 | 2405 | 45 |
| T182-C33LSS· Aug 25, 2021 | Aug 25, 2021 | Classical | 7 | 1970 | 34 |
| OP-05179LSS· Aug 25, 2021 | Aug 25, 2021 | Classical | 4 | 1445 | 5 |
| RM-00244LSS· Aug 18 – 25, 2021 | Aug 18 – 25, 2021 | Classical | 7 | 2090 | 19 |
Sevastopol Waltz 2021 Sevastopol UKR· Aug 17 – 25, 2021 | Aug 17 – 25, 2021 | Classical | 31 | 2108 | 85 |
| T180-D03LSS· Aug 17 – 24, 2021 | Aug 17 – 24, 2021 | Classical | 6 | 1500 | 18 |
Botvinnik Cup 2021 Moscow RUS· Aug 19 – 24, 2021 | Aug 19 – 24, 2021 | Classical | 10 | 1875 | 40 |
82. ch-ARM 1. League Erevan ARM· Aug 11 – 24, 2021 | Aug 11 – 24, 2021 | Classical | 14 | 2178 | 85 |
| QB-00020LSS· Aug 24, 2021 | Aug 24, 2021 | Classical | 3 | 1788 | 5 |
2. Tras-os-Montes Open Braganca POR· Aug 19 – 24, 2021 | Aug 19 – 24, 2021 | Classical | 49 | 2301 | 72 |
86. ch-ESP 2021 Linares ESP· Aug 16 – 24, 2021 | Aug 16 – 24, 2021 | Classical | 129 | 2143 | 361 |
| 11. LSS WCH Q-00009LSS· Aug 23, 2021 | Aug 23, 2021 | Classical | 7 | 1973 | 39 |
| 11. LSS WCH Q-00005LSS· Aug 23, 2021 | Aug 23, 2021 | Classical | 7 | 2214 | 35 |
| ST-00198LSS· Aug 15 – 23, 2021 | Aug 15 – 23, 2021 | Classical | 7 | 2112 | 21 |
| 11. LSS WCH Q-00008LSS· Aug 23, 2021 | Aug 23, 2021 | Classical | 8 | 2294 | 48 |
| 11. LSS WCH Q-00003LSS· Aug 23, 2021 | Aug 23, 2021 | Classical | 7 | 2260 | 40 |
| 11. LSS WCH Q-00004LSS· Aug 23, 2021 | Aug 23, 2021 | Classical | 6 | 2239 | 30 |
Wood Green Inv 2021 London ENG· Aug 19 – 23, 2021 | Aug 19 – 23, 2021 | Classical | 10 | 2365 | 45 |
| Smuk Skak EMT Grp1 2021Skanderborg· Aug 20 – 22, 2021 | Aug 20 – 22, 2021 | Classical | 6 | 2294 | 13 |
ESSThH Ch Girls U8 2021 Thessaloniki GRE· Aug 19 – 22, 2021 | Aug 19 – 22, 2021 | Classical | 3 | 1328 | 6 |
Prokrimatika Neanika ESSTh Thessaloniki GRE· Aug 21 – 22, 2021 | Aug 21 – 22, 2021 | Classical | 9 | 1163 | 7 |