| FIDE World Cadet and Youth Rapid and Blitz Championships 2025 | Blitz Open U8· Apr 16, 2025 | Apr 16, 2025 | Blitz | 6 | 1682 | 5 |
10. Noisiel Open 2025 Noisiel FRA· Apr 12 – 16, 2025 | Apr 12 – 16, 2025 | Classical | 43 | 2227 | 68 |
| FIDE World Cadet and Youth Rapid and Blitz Championships 2025 | Blitz Open U10· Apr 15 – 16, 2025 | Apr 15 – 16, 2025 | Blitz | 8 | 1901 | 8 |
WCh Women 2025 Shanghai Chongqing CHN· Apr 3 – 16, 2025 | Apr 3 – 16, 2025 | Classical | 2 | 2558 | 9 |
ACC Superzonal 2025 Lagos City NGR· Apr 12 – 16, 2025 | Apr 12 – 16, 2025 | Classical | 10 | 2002 | 45 |
| Campeonato Português de Jovens 2024-25 | U20· Apr 12 – 16, 2025 | Apr 12 – 16, 2025 | Blitz | 19 | 1844 | 28 |
10th Noisiel Open 2025 Noisiel FRA· Apr 12 – 16, 2025 | Apr 12 – 16, 2025 | Classical | 46 | 2221 | 79 |
| World Senior Team Chess Championship | Open 65+Prague, Czech Republic· Jan 29 – Apr 16, 2025 | Jan 29 – Apr 16, 2025 | Blitz | 169 | 2115 | 235 |
Zonal 3.1 2025 Erbil IRQ· Apr 8 – 15, 2025 | Apr 8 – 15, 2025 | Classical | 47 | 2040 | 194 |
Zonal 3.1 Women 2025 Erbil IRQ· Apr 8 – 15, 2025 | Apr 8 – 15, 2025 | Classical | 19 | 1778 | 49 |
| FIDE World Cadet & Youth Rapid· Apr 13 – 15, 2025 | Apr 13 – 15, 2025 | Rapid | 50 | 1950 | 45 |
Reykjavik Open 2025 Reykjavik ISL· Apr 9 – 15, 2025 | Apr 9 – 15, 2025 | Classical | 416 | 1985 | 1,693 |
| FIDE World Cadet and Youth Rapid and Blitz Championships 2025 | Rapid Open U14· Apr 13 – 14, 2025 | Apr 13 – 14, 2025 | Blitz | 8 | 2121 | 8 |
| African Superzonal Chess Championship 2025 Open· Apr 12 – 14, 2025 | Apr 12 – 14, 2025 | Classical | 6 | 2039 | 5 |
| FIDE World Cadet and Youth Rapid and Blitz Championships 2025 | Rapid Girls U16· Apr 13 – 14, 2025 | Apr 13 – 14, 2025 | Blitz | 8 | 2000 | 7 |
| FIDE World Cadet and Youth Rapid and Blitz Championships 2025 | Rapid Girls U18· Apr 13 – 14, 2025 | Apr 13 – 14, 2025 | Blitz | 7 | 2040 | 6 |
RUDAR 38 IM 2025 Pozarevac SRB· Apr 7 – 14, 2025 | Apr 7 – 14, 2025 | Classical | 10 | 2224 | 45 |
RUDAR 19 GM 2025 Pozarevac SRB· Apr 7 – 14, 2025 | Apr 7 – 14, 2025 | Classical | 11 | 2399 | 51 |
Melbourne Int Open 2025 Melbourne AUS· Apr 7 – 14, 2025 | Apr 7 – 14, 2025 | Classical | 29 | 2148 | 122 |
| LXX Campeonato Abierto Mexicano -Querétaro 2025- | Sub-8 Fem· Apr 13, 2025 | Apr 13, 2025 | Blitz | 6 | 1476 | 5 |
| 13. Open Grand Prix, by SOXalandriou (Rapid)Averof 4, Chalandri, 152 32, Greece· Apr 13, 2025 | Apr 13, 2025 | Rapid | 6 | 2028 | 6 |
| LXX Campeonato Abierto Mexicano -Querétaro 2025- | Sub-8 Abs· Apr 13, 2025 | Apr 13, 2025 | Blitz | 7 | 1561 | 6 |
| LXX Campeonato Abierto Mexicano -Querétaro 2025- | Sub-10 Fem· Apr 13, 2025 | Apr 13, 2025 | Blitz | 6 | 1590 | 5 |
28. Schloss Open 2025 Werther GER· Apr 10 – 13, 2025 | Apr 10 – 13, 2025 | Classical | 37 | 2105 | 77 |
28th Schloss Open 2025 Werther GER· Apr 10 – 13, 2025 | Apr 10 – 13, 2025 | Classical | 36 | 2097 | 75 |
| 4NCL Division FourPeterborough· Feb 15 – Apr 13, 2025 | Feb 15 – Apr 13, 2025 | Classical | 176 | 1820 | 193 |
56. Italian Teams Master Darfo Boario Terme ITA· Apr 7 – 13, 2025 | Apr 7 – 13, 2025 | Classical | 113 | 2315 | 367 |
TCh-EUR Senior +50 2025 Swidnica POL· Apr 5 – 13, 2025 | Apr 5 – 13, 2025 | Classical | 40 | 2075 | 154 |
| Campeonato Nacional Femenino 2025 ChileEstadio español, santiago, Chile· Feb 11 – Apr 13, 2025 | Feb 11 – Apr 13, 2025 | Classical | 25 | 1783 | 50 |
56th Italian Teams Master Darfo Boario Terme ITA· Apr 7 – 13, 2025 | Apr 7 – 13, 2025 | Classical | 104 | 2288 | 304 |
TCh-EUR Senior +65 2025 Swidnica POL· Apr 5 – 13, 2025 | Apr 5 – 13, 2025 | Classical | 42 | 2062 | 148 |
ECo-C TCh-SVK 2024-25 Slovakia SVK· Jan 18 – Apr 13, 2025 | Jan 18 – Apr 13, 2025 | Classical | 166 | 2249 | 420 |
| 4NCL Division Three KnightsPeterborough· Jan 11 – Apr 13, 2025 | Jan 11 – Apr 13, 2025 | Classical | 105 | 1965 | 141 |
| EUROPEAN SENIOR TEAM CHESS CHAMPIONSHIP | 65+· Apr 5 – 12, 2025 | Apr 5 – 12, 2025 | Classical | 21 | 2025 | 13 |
| Columbus Energy Polish Amateur Championship 2025 - 2200 FIDESianozety· Jan 19 – Apr 12, 2025 | Jan 19 – Apr 12, 2025 | Blitz | 9 | 2131 | 8 |
| Columbus Energy Polish Amateur Championship 2025 - 1600 FIDESianozety· Apr 5 – 12, 2025 | Apr 5 – 12, 2025 | Blitz | 22 | 1530 | 13 |
Jersey International 2025 St Clement Bay JCI· Apr 5 – 12, 2025 | Apr 5 – 12, 2025 | Classical | 17 | 2110 | 77 |
FSIM April 2025 Budapest HUN· Apr 5 – 12, 2025 | Apr 5 – 12, 2025 | Classical | 10 | 2244 | 43 |
FSGM April 2025 Budapest HUN· Apr 5 – 12, 2025 | Apr 5 – 12, 2025 | Classical | 11 | 2417 | 47 |
| LJEM 2025 - Niedersachsen - Open· Apr 11, 2025 | Apr 11, 2025 | Classical | 7 | 1605 | 7 |
25. ch-EUR Indiv w 2025 Rhodes GRE· Mar 31 – Apr 11, 2025 | Mar 31 – Apr 11, 2025 | Classical | 134 | 2154 | 325 |
| FIDE World Junior Chess Championship 2025 | Girls· Feb 25 – Apr 11, 2025 | Feb 25 – Apr 11, 2025 | Classical | 99 | 2097 | 202 |
25th ch-EUR Indiv w 2025 Rhodes GRE· Mar 31 – Apr 11, 2025 | Mar 31 – Apr 11, 2025 | Classical | 136 | 2142 | 675 |
| EUROPEAN SENIOR TEAM CHESS CHAMPIONSHIP | 50+· Apr 5 – 10, 2025 | Apr 5 – 10, 2025 | Classical | 16 | 2090 | 9 |
| Israeli Youth Championships 2025 | U14· Apr 4 – 10, 2025 | Apr 4 – 10, 2025 | Blitz | 6 | 1946 | 5 |
| 4e Tournoi du mardi à Laval 2024-2025 | Section BCentre Communautaire St-Louis-de-Montfort 25 Rue St Louis, Laval, Québec, H7G 4W3· Mar 12 – Apr 9, 2025 | Mar 12 – Apr 9, 2025 | Blitz | 9 | 1656 | 8 |
| Israeli Youth Championships 2025 | U12· Apr 4 – 9, 2025 | Apr 4 – 9, 2025 | Blitz | 7 | 1844 | 5 |
| 4e Tournoi du mardi à Laval 2024-2025 | Section ACentre Communautaire St-Louis-de-Montfort 25 Rue St Louis, Laval, Québec, H7G 4W3· Mar 12 – Apr 9, 2025 | Mar 12 – Apr 9, 2025 | Blitz | 8 | 1832 | 9 |
| Jersey International Festival 2025· Apr 5 – 9, 2025 | Apr 5 – 9, 2025 | Blitz | 14 | 2042 | 8 |
Zonal 3.4 Women 2025 Almaty KAZ· Apr 2 – 9, 2025 | Apr 2 – 9, 2025 | Classical | 43 | 1936 | 176 |