| 2025 African Individual Chess Championships | women· May 13 – 20, 2025 | May 13 – 20, 2025 | Classical | 24 | 1778 | 29 |
ch-Africa 2025 Kerdasa EGY· May 13 – 20, 2025 | May 13 – 20, 2025 | Classical | 48 | 2123 | 50 |
ch-Africa Women 2025 Kerdasa EGY· May 13 – 20, 2025 | May 13 – 20, 2025 | Classical | 24 | 1778 | 56 |
58. Capablanca Mem Elite Havana CUB· May 10 – 19, 2025 | May 10 – 19, 2025 | Classical | 5 | 2607 | 20 |
| SixDays Budapest May IMBBudapest· May 14 – 19, 2025 | May 14 – 19, 2025 | Classical | 10 | 2243 | 9 |
96. ch-GER Candidates Munich GER· May 17 – 19, 2025 | May 17 – 19, 2025 | Classical | 33 | 2289 | 50 |
96. ch-GER Masters 2025 Munich GER· May 15 – 19, 2025 | May 15 – 19, 2025 | Classical | 10 | 2603 | 25 |
| LVIII Internacional Capablanca in Memoriam | Open Magistral· May 18 – 19, 2025 | May 18 – 19, 2025 | Blitz | 8 | 2425 | 5 |
58th Capablanca Mem Elite Havana CUB· May 10 – 19, 2025 | May 10 – 19, 2025 | Classical | 5 | 2607 | 20 |
SixDays Budapest May GM Budapest HUN· May 14 – 19, 2025 | May 14 – 19, 2025 | Classical | 11 | 2405 | 51 |
SixDays Budapest May IMA Budapest HUN· May 14 – 19, 2025 | May 14 – 19, 2025 | Classical | 10 | 2242 | 44 |
| ACC Monday Nights 2025 | Autumn· Mar 31 – May 19, 2025 | Mar 31 – May 19, 2025 | Blitz | 17 | 1921 | 12 |
SixDays Budapest May IMB Budapest HUN· May 14 – 19, 2025 | May 14 – 19, 2025 | Classical | 10 | 2243 | 45 |
GER Ch Women 2025 Munich GER· May 15 – 19, 2025 | May 15 – 19, 2025 | Classical | 10 | 2246 | 25 |
| Mongolia Amateurs Open 2025· May 16 – 18, 2025 | May 16 – 18, 2025 | Classical | 12 | 1659 | 8 |
| Arie Nijman Memorial 2025· May 16 – 18, 2025 | May 16 – 18, 2025 | Blitz | 19 | 1888 | 21 |
15. WLC Weekender 2025 Eindhoven NED· May 16 – 18, 2025 | May 16 – 18, 2025 | Classical | 69 | 2049 | 182 |
| WLC Weekend Tournament 2025 | Group B· May 16 – 18, 2025 | May 16 – 18, 2025 | Blitz | 26 | 1782 | 27 |
| 2025 Marshall Monthly U2400 | May· May 17 – 18, 2025 | May 17 – 18, 2025 | Blitz | 29 | 1920 | 23 |
| 100º Semifinal del Campeonato Argentino de Ajedrez - Mar de Ajó· May 13 – 18, 2025 | May 13 – 18, 2025 | Blitz | 26 | 2249 | 22 |
Thess-Chalk Team Final 4 Thessaloniki GRE· May 17 – 18, 2025 | May 17 – 18, 2025 | Classical | 20 | 2115 | 16 |
Ostravsky Konik Open A Ostrava CZE· May 10 – 18, 2025 | May 10 – 18, 2025 | Classical | 25 | 2194 | 52 |
| RLP-Schnellschachmeisterschaft Neuwied 2025· May 18, 2025 | May 18, 2025 | Rapid | 25 | 2041 | 49 |
| 4to IRT Centro Comercial AV. Chile· May 18, 2025 | May 18, 2025 | Blitz | 111 | 1778 | 231 |
| Caplin Hastings Weekend 2025 | IntermediateHorntye Park, Hastings, United Kingdom· Jan 4 – May 18, 2025 | Jan 4 – May 18, 2025 | Blitz | 33 | 1652 | 32 |
Africa Ch 2025 Kerdasa EGY· May 13 – 18, 2025 | May 13 – 18, 2025 | Classical | 54 | 2123 | 137 |
15th WLC Weekender 2025 Eindhoven NED· May 16 – 18, 2025 | May 16 – 18, 2025 | Classical | 68 | 2005 | 176 |
| Torneo Universitario FEDEU-CENFOTEC 2025 | Femenino· May 17, 2025 | May 17, 2025 | Blitz | 8 | 1652 | 8 |
| Campeonato Centroamericano y del Caribe U20 | Femenino· May 12 – 17, 2025 | May 12 – 17, 2025 | Blitz | 7 | 2247 | 7 |
| Tunnelvision XXXII· May 17, 2025 | May 17, 2025 | Blitz | 14 | 1911 | 9 |
| Torneo Universitario FEDEU-CENFOTEC 2025 | Absoluto· May 17, 2025 | May 17, 2025 | Blitz | 16 | 1751 | 14 |
| Auckland Double Weekends 2025 | May· May 9 – 17, 2025 | May 9 – 17, 2025 | Blitz | 19 | 1737 | 16 |
| Campeonato Centroamericano y del Caribe U20 | Absoluto· May 12 – 17, 2025 | May 12 – 17, 2025 | Blitz | 10 | 2217 | 9 |
| 3. Torneo Ajedrez Villa de Noblejas | III Torneo Ajedrez Villa de Noblejas· May 17, 2025 | May 17, 2025 | Blitz | 33 | 1824 | 34 |
| I CAMPEONATO DE XADREZ MENTES BRILHANTES (XIV)· May 17, 2025 | May 17, 2025 | Rapid | 16 | 1790 | 21 |
Superbet ROM Classic 2025 Bucharest ROU· May 7 – 16, 2025 | May 7 – 16, 2025 | Classical | 10 | 2748 | 45 |
16. KIIT Cat A Open 2025 Bhubaneswar IND· May 9 – 16, 2025 | May 9 – 16, 2025 | Classical | 89 | 2020 | 181 |
58th Capablanca Mem Open Havana CUB· May 10 – 16, 2025 | May 10 – 16, 2025 | Classical | 116 | 2138 | 288 |
Peter Long Memorial 2025 Roquetas de Mar ESP· May 10 – 16, 2025 | May 10 – 16, 2025 | Classical | 29 | 2044 | 87 |
16th KIIT Cat A Open 2025 Bhubaneswar IND· May 9 – 16, 2025 | May 9 – 16, 2025 | Classical | 83 | 2012 | 158 |
| 4ta Uncoli 2024-2025· May 13 – 16, 2025 | May 13 – 16, 2025 | Classical | 60 | 1730 | 85 |
Hovhannes Danielyan Memorial Erevan ARM· May 8 – 15, 2025 | May 8 – 15, 2025 | Classical | 10 | 2302 | 45 |
Grosslobming WGP 2025 Grosslobming AUT· May 6 – 15, 2025 | May 6 – 15, 2025 | Classical | 10 | 2482 | 45 |
Asian Individual 2025 Al Ain UAE· May 7 – 15, 2025 | May 7 – 15, 2025 | Classical | 159 | 2364 | 637 |
Asian Individual women Al Ain UAE· May 7 – 15, 2025 | May 7 – 15, 2025 | Classical | 100 | 2122 | 401 |
| Asian Individual Chess Championships 2025 | Open· May 10 – 15, 2025 | May 10 – 15, 2025 | Classical | 43 | 2321 | 24 |
76. ch-POL Women 2025 Krakow POL· May 6 – 14, 2025 | May 6 – 14, 2025 | Classical | 10 | 2325 | 45 |
82. PGE ch-POL 2025 Krakow POL· May 6 – 14, 2025 | May 6 – 14, 2025 | Classical | 10 | 2550 | 43 |
| NSCC Autumn Tournament 2025· Apr 16 – May 14, 2025 | Apr 16 – May 14, 2025 | Blitz | 37 | 1645 | 32 |
76th ch-POL Women 2025 Krakow POL· May 6 – 14, 2025 | May 6 – 14, 2025 | Classical | 10 | 2325 | 45 |