Zonal 3.4 2025 Almaty KAZ· Apr 2 – 9, 2025 | Apr 2 – 9, 2025 | Classical | 89 | 2173 | 375 |
| 2025 Melbourne International Open | RapidMelbourne, Australia· Apr 9, 2025 | Apr 9, 2025 | Rapid | 8 | 2049 | 8 |
3. FAOGBA Open 2025 Buenos Aires ARG· Apr 2 – 8, 2025 | Apr 2 – 8, 2025 | Classical | 33 | 2225 | 62 |
| 2. Fingal Open Championships Ireland· Jan 7 – Apr 8, 2025 | Jan 7 – Apr 8, 2025 | Classical | 10 | 1770 | 6 |
| 2025 South Australian Championship· Feb 4 – Apr 8, 2025 | Feb 4 – Apr 8, 2025 | Blitz | 9 | 1961 | 15 |
| Zone 4.2 (West Africa) Chess Championship 2025 | Open· Apr 2 – 8, 2025 | Apr 2 – 8, 2025 | Blitz | 30 | 1974 | 52 |
| 25. European Women's Chess Championship 2025· Mar 31 – Apr 8, 2025 | Mar 31 – Apr 8, 2025 | Classical | 127 | 2161 | 151 |
3rd FAOGBA Open 2025 Buenos Aires ARG· Apr 3 – 8, 2025 | Apr 3 – 8, 2025 | Classical | 26 | 2251 | 33 |
| Final del Campeonato Nacional Mayores Bolivia 2025 | Absoluto· Apr 2 – 6, 2025 | Apr 2 – 6, 2025 | Classical | 10 | 2172 | 20 |
ch-CYP 2025 Larnaka CYP· Apr 5 – 6, 2025 | Apr 5 – 6, 2025 | Classical | 12 | 1953 | 7 |
| 2025 Marshall Premier FIDE | April· Apr 4 – 6, 2025 | Apr 4 – 6, 2025 | Blitz | 13 | 2087 | 8 |
College Final Four 2025 Richardson USA· Apr 5 – 6, 2025 | Apr 5 – 6, 2025 | Classical | 19 | 2436 | 24 |
| 2. Austrian Bundesliga Mitte 2024-25· Apr 4 – 6, 2025 | Apr 4 – 6, 2025 | Classical | 36 | 2227 | 21 |
Chestnut Horse Open Final Kyiv UKR· Apr 6, 2025 | Apr 6, 2025 | Classical | 11 | 2217 | 10 |
RUDAR 37 IM 2025 Pozarevac SRB· Mar 30 – Apr 6, 2025 | Mar 30 – Apr 6, 2025 | Classical | 11 | 2258 | 51 |
| ASCUN NODO BOGOTA Abril 2025 | Rapido· Apr 5 – 6, 2025 | Apr 5 – 6, 2025 | Rapid | 56 | 1742 | 111 |
Chestnut Horse Open Final Kiev UKR· Apr 6, 2025 | Apr 6, 2025 | Classical | 11 | 2299 | 52 |
| 4NCL Division TwoPeterborough· Jan 25 – Apr 6, 2025 | Jan 25 – Apr 6, 2025 | Classical | 139 | 2094 | 196 |
TCh-AUT 2024-25 Austria AUT· Apr 2 – 6, 2025 | Apr 2 – 6, 2025 | Classical | 98 | 2401 | 216 |
13. Int Senioren-Cup Rottach-Egern GER· Mar 29 – Apr 6, 2025 | Mar 29 – Apr 6, 2025 | Classical | 154 | 1894 | 355 |
RUDAR 18 GM 2025 Pozarevac SRB· Mar 30 – Apr 6, 2025 | Mar 30 – Apr 6, 2025 | Classical | 10 | 2394 | 44 |
| 4NCL Division OnePeterborough· Jan 25 – Apr 6, 2025 | Jan 25 – Apr 6, 2025 | Classical | 129 | 2261 | 197 |
| 4NCL Division Three BishopsPeterborough· Jan 11 – Apr 6, 2025 | Jan 11 – Apr 6, 2025 | Classical | 122 | 1943 | 213 |
13th Int Senioren-Cup Rottach-Egern GER· Mar 29 – Apr 6, 2025 | Mar 29 – Apr 6, 2025 | Classical | 149 | 1884 | 377 |
| 2025 South Carolina Scholastic National Qualifier Invitational· Apr 5, 2025 | Apr 5, 2025 | Blitz | 7 | 1859 | 5 |
| Final del Campeonato Nacional Mayores Bolivia 2025 | Femenino· Apr 2 – 5, 2025 | Apr 2 – 5, 2025 | Classical | 7 | 1840 | 7 |
| 13. Internationaler Schach-Senioren-Cup am Tegernsee 2025· Mar 29 – Apr 5, 2025 | Mar 29 – Apr 5, 2025 | Blitz | 45 | 2110 | 40 |
| Olimpiada Nacional Fase Macroregional A Chihuahua· Apr 4 – 5, 2025 | Apr 4 – 5, 2025 | Blitz | 16 | 1793 | 10 |
| Robert Spångbergs Minnesturnering 2025· Apr 5, 2025 | Apr 5, 2025 | Blitz | 18 | 1967 | 22 |
| ASIAN ZONAL CHESS CHAMPIONSHIPS ZONE 3.4 | women· Mar 31 – Apr 5, 2025 | Mar 31 – Apr 5, 2025 | Classical | 38 | 1968 | 36 |
| Guyana National Women's championshipsDavid Rose School, Guyana· Mar 22 – Apr 5, 2025 | Mar 22 – Apr 5, 2025 | Blitz | 10 | 1471 | 28 |
PNWCC IM Norm RR Apr Bellevue, WA USA· Apr 2 – 5, 2025 | Apr 2 – 5, 2025 | Classical | 10 | 2289 | 45 |
| Austrian Bundesliga 2024-25· Apr 2 – 5, 2025 | Apr 2 – 5, 2025 | Classical | 68 | 2449 | 61 |
| 3. Abierto Internacional de FAOGBA 2025(Polideportivo Municipal de Lu· Apr 2 – 5, 2025 | Apr 2 – 5, 2025 | Classical | 24 | 2209 | 19 |
| ASIAN ZONAL CHESS CHAMPIONSHIPS ZONE 3.4 | Open· Mar 31 – Apr 5, 2025 | Mar 31 – Apr 5, 2025 | Classical | 75 | 2181 | 82 |
| ASCUN NODO BOGOTA Abril 2025 | Blitz· Apr 5, 2025 | Apr 5, 2025 | Blitz | 77 | 1755 | 195 |
| Cyprus Closed Chess Championship 2025 | womenLarnaca, Cyprus· Mar 7 – Apr 5, 2025 | Mar 7 – Apr 5, 2025 | Classical | 9 | 1601 | 12 |
| Cyprus Closed Chess Championship 2025 | OpenLarnaca, Cyprus· Mar 7 – Apr 5, 2025 | Mar 7 – Apr 5, 2025 | Blitz | 12 | 1953 | 57 |
| FICGS__CHESS__RAPID_C__000309FICGS· Apr 4, 2025 | Apr 4, 2025 | Classical | 7 | 1729 | 8 |
| UP State Senior Open Chess Championship 2025-26· Apr 2 – 4, 2025 | Apr 2 – 4, 2025 | Blitz | 39 | 1626 | 43 |
| Zone 4.2 (West Africa) Chess Championship 2025 | women· Apr 2 – 4, 2025 | Apr 2 – 4, 2025 | Classical | 13 | 1772 | 20 |
| Czech Youth Championship 2025 | h14Kouty nad Desnou, Czech Republic· Mar 8 – Apr 4, 2025 | Mar 8 – Apr 4, 2025 | Classical | 24 | 1931 | 52 |
| 49. FV Schach Team Cup Final· Apr 2, 2025 | Apr 2, 2025 | Blitz | 12 | 2180 | 6 |
| 3. Alexander Alekhine Cup· Mar 16 – Apr 2, 2025 | Mar 16 – Apr 2, 2025 | Blitz | 6 | 2224 | 10 |
| 2025 Spring NYC Chess Norms | IM B· Mar 26 – 31, 2025 | Mar 26 – 31, 2025 | Blitz | 9 | 2230 | 15 |
| 2025 Spring NYC Chess Norms | GM A· Mar 26 – 31, 2025 | Mar 26 – 31, 2025 | Blitz | 10 | 2392 | 11 |
| 6. DD-DBCA Chess Tournament 2025· Mar 26 – 31, 2025 | Mar 26 – 31, 2025 | Blitz | 38 | 1794 | 36 |
| ITT 53º Aniversario Torre Blanca - Campeonato del ClubSanchez de Bustamante 587· Mar 24 – 31, 2025 | Mar 24 – 31, 2025 | Classical | 10 | 2302 | 39 |
New York Spring GMA 2025 New York USA· Mar 27 – 31, 2025 | Mar 27 – 31, 2025 | Classical | 10 | 2392 | 44 |
New York Spring IMB 2025 New York, NY USA· Mar 27 – 31, 2025 | Mar 27 – 31, 2025 | Blitz | 10 | 2237 | 9 |