| OP 5 RAPID GRAND PRIX BRESCIANO 2026 | 2026-09-27 2026-09-27 | BRESCIA · ITA | Rapid | 40 |
| 39eme rapide amateurs d'Eybens | 2026-09-27 2026-09-27 | EYBENS · FRA | Rapid | 63 |
| 39eme rapide principal d'Eybens | 2026-09-27 2026-09-27 | EYBENS · FRA | Rapid | 23 |
| Rapide de L'Echiquier Mosellan 2026 B | 2026-09-27 2026-09-27 | L'HOPITAL · FRA | Rapid | 16 |
| Rapide de L'Echiquier Mosellan 2026 A | 2026-09-27 2026-09-27 | L'HOPITAL · FRA | Rapid | 74 |
| SHRI DHANPAT RAI SACHDEVA MEMORIAL INTERNATIONAL OPEN BLITZ FIDE RATED CHESS TOURNAMENT 2026 | 2026-09-27 2026-09-27 | New Delhi · IND | Blitz | 707 |
| CR EMILIA-ROMAGNA RAPID 2026 | 2026-09-27 2026-09-27 | BOLOGNA · ITA | Rapid | 58 |
| Tournoi de Meillon 2026 | 2026-09-27 2026-09-27 | MEILLON · FRA | Rapid | 14 |
| VIII Turniej blyskawiczny Klubu Marynarki Wojennej 2026 | 2026-09-27 2026-09-27 | Gdynia · POL | Blitz | 20 |
| Open Limburgs Kampioenschap Rapid 2026 | 2026-09-27 2026-09-27 | Landgraaf · NED | Rapid | 75 |
| 5th Open Blitz SO Dramas 2026 | 2026-09-27 2026-09-27 | Drama · GRE | Blitz | 25 |
| AlphaChess FIDE Triathlon - Accelerated Rapid 27 September 2026 | 2026-09-27 2026-09-27 | Potters Bar · ENG | Rapid | 34 |
| Acquire Chess U20 Tournament - September 2026 Edition | 2026-09-26 2026-09-26 | Monrovia · LBR | Rapid | 16 |
| 2026 Burlington Summer Sendoff Blitz | 2026-09-26 2026-09-26 | Burlington · CAN | Blitz | 16 |
| Beirut Chess Club - Khaled Shihab First Memorial Classical Tournament 2026 | 2026-09-26 2026-10-10 | Beirut · LBN | Classical | 36 |
| Torneo FIDE Clasico Yucatan Septiembre C2 Ok | 2026-09-26 2026-09-28 | YUC, Merida · MEX | Classical | 6 |
| Torneo FIDE Clasico Yucatan Septiembre B2 Ok | 2026-09-26 2026-09-28 | YUC, Merida · MEX | Classical | 6 |
| Torneo de Ajedrez Circuito de Escritores FIDE Mary Shelley | 2026-09-26 2026-09-26 | CDM, Ciudad de Mexico · MEX | Blitz | 9 |
| 3o Circuito FIDE CBX Canoas Shopping Absoluto 7o Etapa | 2026-09-26 2026-09-26 | Canoas RS · BRA | Rapid | 22 |
| 3o Circuito FIDE CBX Canoas Shopping Sub 12 7o Etapa | 2026-09-26 2026-09-26 | Canoas RS · BRA | Rapid | 13 |
| 3o Circuito FIDE CBX Canoas Shopping Sub 18 7o Etapa | 2026-09-26 2026-09-26 | Canoas RS · BRA | Rapid | 19 |
| Universities and U25 Individual Chess Tournament 2026 - Ladies | 2026-09-26 2026-09-27 | Nairobi · KEN | Classical | 16 |
| Universities and U25 Individual Chess Tournament 2026 - Open | 2026-09-26 2026-09-27 | Nairobi · KEN | Classical | 87 |
| PSC-NCFP SELECTION NATIONAL CHESS CHAMPIONSHIPS ELIMINATION Women's Division Visayas Leg | 2026-09-26 2026-09-28 | Cebu City · PHI | Classical | 42 |
| PSC-NCFP SELECTION NATIONAL CHESS CHAMPIONSHIPS ELIMINATION Men's Division Visayas Leg | 2026-09-26 2026-09-28 | Cebu City · PHI | Classical | 99 |
| MASIKHAY GAMBIT FIDE RATED KIDDIES CHESS TOURNAMENT | 2026-09-26 2026-09-26 | TAGUIG, METRO MANILA · PHI | Rapid | 35 |
| MASIKHAY GAMBIT FIDE RATED OPEN CHESS TOURNAMENT | 2026-09-26 2026-09-26 | TAGUIG, METRO MANILA · PHI | Rapid | 34 |
| MASIKHAY GAMBIT FIDE RATED JUNIOR CHESS TOURNAMENT | 2026-09-26 2026-09-26 | TAGUIG, METRO MANILA · PHI | Rapid | 12 |
| Diyandi Festival FIDE Rated Chess Tournament 2026 U17 Category | 2026-09-26 2026-09-26 | Iligan City · PHI | Rapid | 22 |
| Diyandi Festival FIDE Rated Chess Tournament 2026 U12 Category | 2026-09-26 2026-09-26 | Iligan City · PHI | Rapid | 38 |
| September Skakfelags Mosfellsbaejar 2026 | 2026-09-26 2026-09-26 | Mosfellsbaer · ISL | Blitz | 14 |
| 2627 AUT STMK KREIS SUED LIGA 1 | 2026-09-26 2026-09-26 | several · AUT | Classical | 304 |
| CD Coimbra 2026-27 - tiebreak | 2026-09-26 2026-09-26 | Soure · POR | Blitz | 2 |
| Offene NRW-Senioren-Schnellschacheinzelmeisterschaft 2026 | 2026-09-26 2026-09-27 | Oer-Erkenschwick · GER | Rapid | 14 |
| Nawab Chess Club 1st Rapid Tournament - Open | 2026-09-26 2026-09-26 | Bahawalpur · PAK | Rapid | 35 |
| 15th All-Russian Rapid Chess Tournament for Teams from Small Towns and Settlements | 2026-09-26 2026-09-27 | Syzran · RUS | Rapid | 33 |
| Rapid A Ekibastuz 2026 | 2026-09-26 2026-09-26 | Ekibastuz · KAZ | Rapid | 25 |
| VPHS_NEVA OPEN September CITY Mall 2026 Standard-A | 2026-09-26 2026-09-27 | St. Petersburg · RUS | Classical | 17 |
| National Blitz Team Chess Championship 2026 - Under 14 Open | 2026-09-26 2026-09-26 | Colombo · SRI | Blitz | 77 |
| National Blitz Team Chess Championship 2026 - Under 12 Open | 2026-09-26 2026-09-26 | Colombo · SRI | Blitz | 114 |
| National Blitz Team Chess Championship 2026 - Under 12 Girls | 2026-09-26 2026-09-26 | Colombo · SRI | Blitz | 42 |
| National Blitz Team Chess Championship 2026 - Under 14 Girls | 2026-09-26 2026-09-26 | Colombo · SRI | Blitz | 33 |
| National Rapid Team Chess Championship 2026 - Under 14 Girls | 2026-09-26 2026-09-26 | Colombo · SRI | Rapid | 49 |
| National Rapid Team Chess Championship 2026 - Under 12 Girls | 2026-09-26 2026-09-26 | Colombo · SRI | Rapid | 64 |
| National Rapid Team Chess Championship 2026 - Under 10 Girls | 2026-09-26 2026-09-26 | Colombo · SRI | Rapid | 74 |
| National Rapid Team Chess Championship 2026 - Under 10 Open | 2026-09-26 2026-09-26 | Colombo · SRI | Rapid | 129 |
| National Rapid Team Chess Championship 2026 - Under 08 Open | 2026-09-26 2026-09-26 | Colombo · SRI | Rapid | 84 |
| Inauguracion Sala de Ajedrez | 2026-09-26 2026-09-26 | Catia La Mar - La Guaira · VEN | Blitz | 42 |
| Ultima by ASOP Dias LOW K12 Sep 2026 | 2026-09-26 2026-10-24 | Athens · GRE | Classical | 19 |
| SSA Ag. Vasiliou Riou Rapid - Sep 2026 | 2026-09-26 2026-09-27 | Rio Achais · GRE | Rapid | 8 |