| Oberliga Nord West 2026-2027 Oktober 2026 | 2026-10-11 2026-10-11 | verschiedene · GER | Classical | 80 |
| Oberliga Nord Nord 2026-2027 Oktober 2026 | 2026-10-11 2026-10-11 | verschiedene · GER | Classical | 64 |
| Oberliga Suedwest 2026-2027 Oktober 2026 | 2026-10-11 2026-10-11 | verschiedene · GER | Classical | 32 |
| OP BLITZ MARATONA 5' 3" | 2026-10-11 2026-10-11 | VILLA CORTESE · ITA | Blitz | 67 |
| IV Ogolnopolskie Grand Prix Kozuchowa - turniej 3 | 2026-10-11 2026-10-11 | Kozuchow · POL | Rapid | 32 |
| OP RAPID DEL CAPABLANCA | 2026-10-11 2026-10-11 | VENEZIA · ITA | Rapid | 22 |
| Otwarte Mistrzostwa Wroclawia 2026 - grupa OPEN (FIDE) - T3 | 2026-10-11 2026-10-11 | Wroclaw · POL | Rapid | 18 |
| Summit Rapid October U1600 Division 2026 | 2026-10-11 2026-10-11 | Auckland · NZL | Rapid | 47 |
| Summit Rapid October Open Division 2026 | 2026-10-11 2026-10-11 | Auckland · NZL | Rapid | 49 |
| ELO-Turnier-Serie Luebecker SV 2026 Oktober Schweizer System | 2026-10-11 2026-10-11 | Luebeck · GER | Classical | 6 |
| ELO-Turnier-Serie Luebecker SV 2026 Oktober Vierergruppen | 2026-10-11 2026-10-11 | Luebeck · GER | Classical | 20 |
| Elegant International Chess Academy 23rd Youth Rapid Rating Chess Tournament | 2026-10-10 2026-10-10 | Dhaka · BAN | Rapid | 52 |
| Elegant 49th FIDE Blitz Rating Chess Tournament 2026 | 2026-10-10 2026-10-10 | Dhaka · BAN | Blitz | 33 |
| Open Chess Tournament -B(Rapid) - Autumn Cup for Beginners 2026 | 2026-10-10 2026-10-10 | Kremenchuk · UKR | Rapid | 17 |
| VPHS_Technopolis 2026 10 October RAPID-C | 2026-10-10 2026-10-10 | Moscow · RUS | Rapid | 23 |
| VPHS_Technopolis 2026 10-11 October STANDARD_A | 2026-10-10 2026-10-11 | Moscow · RUS | Classical | 35 |
| Sahovski turnir povodom Dana opcine Sanski Most | 2026-10-10 2026-10-10 | Sanski Most · BIH | Blitz | 43 |
| Campionat de Catalunya d'Equips per Edats 2026 - Sub18 B | 2026-10-10 2026-10-11 | Lloret de Mar (Girona) · ESP | Classical | 14 |
| Mistrzostwa Dolnego Slaska Juniorow w Szachach Szybkich 2026 - C18 | 2026-10-10 2026-10-10 | Zmigrod · POL | Rapid | 11 |
| Mistrzostwa Dolnego Slaska Juniorow w Szachach Szybkich 2026 - C16 | 2026-10-10 2026-10-10 | Zmigrod · POL | Rapid | 19 |
| Mistrzostwa Dolnego Slaska Juniorow w Szachach Szybkich 2026 - C14 | 2026-10-10 2026-10-10 | Zmigrod · POL | Rapid | 27 |
| Mistrzostwa Dolnego Slaska Juniorow w Szachach Szybkich 2026 - C12 | 2026-10-10 2026-10-10 | Zmigrod · POL | Rapid | 26 |
| Mistrzostwa Dolnego Slaska Juniorow w Szachach Szybkich 2026 - C10 | 2026-10-10 2026-10-10 | Zmigrod · POL | Rapid | 45 |
| Mistrzostwa Dolnego Slaska Juniorow w Szachach Szybkich 2026 - C08 | 2026-10-10 2026-10-10 | Zmigrod · POL | Rapid | 28 |
| Mistrzostwa Dolnego Slaska Juniorow w Szachach Szybkich 2026 - D16 D18 | 2026-10-10 2026-10-10 | Zmigrod · POL | Rapid | 8 |
| Mistrzostwa Dolnego Slaska Juniorow w Szachach Szybkich 2026 - D14 | 2026-10-10 2026-10-10 | Zmigrod · POL | Rapid | 10 |
| Mistrzostwa Dolnego Slaska Juniorow w Szachach Szybkich 2026 - D12 | 2026-10-10 2026-10-10 | Zmigrod · POL | Rapid | 13 |
| Mistrzostwa Dolnego Slaska Juniorow w Szachach Szybkich 2026 - D08 D10 | 2026-10-10 2026-10-10 | Zmigrod · POL | Rapid | 18 |
| 2026 Ontario Seniors Championship | 2026-10-10 2026-10-12 | Toronto · CAN | Classical | 14 |
| NCA - First League - Tournament No. 4 | 2026-10-10 2026-10-10 | BISHKEK · KGZ | Rapid | 17 |
| NCA - Second League - Tournament No. 4 | 2026-10-10 2026-10-10 | BISHKEK · KGZ | Rapid | 45 |
| 2026 Gauteng North Open Chess Tournament (C) | 2026-10-10 2026-10-11 | Pretoria · RSA | Classical | 11 |
| 2026 Gauteng North Open Chess Tournament (B) | 2026-10-10 2026-10-11 | Pretoria · RSA | Classical | 18 |
| 2026 Gauteng North Open Chess Tournament (A) | 2026-10-10 2026-10-11 | Pretoria · RSA | Classical | 16 |
| Open Chess Tournament A (Rapid) - Autumn Cup for Rated Players 2026 | 2026-10-10 2026-10-10 | Kremenchuk · UKR | Rapid | 22 |
| IRT RAPIDO MEJORANDO TU ELO COPA ASOAJEDREZ MONAGAS | 2026-10-10 2026-10-10 | Maturin - Estado Monagas · VEN | Rapid | 63 |
| XVII Turniej o Puchar Marszalka Grupa A - Ponadpodstawowe - OPEN FIDE | 2026-10-10 2026-10-10 | Sokolka · POL | Rapid | 7 |
| Blitz Amateur 2026 | 2026-10-10 2026-10-10 | Punta del Este · URU | Blitz | 12 |
| PAZDZIERNIKOWY Turniej o TYSIAKA 2026 | 2026-10-10 2026-10-11 | Wroclaw · POL | Classical | 25 |
| 30th Chess.sg Age Group Championship | 2026-10-10 2026-10-10 | Singapore · SGP | Rapid | 29 |
| 2026 Windhoek Open | 2026-10-10 2026-10-10 | Windhoek · NAM | Rapid | 39 |
| 2026 Lesotho Independence Chess Championship | 2026-10-10 2026-10-11 | Maseru · LES | Classical | 36 |
| Sahand Chess Club Rated Rapid Tournament 18 Mehr 1405 | 2026-10-10 2026-10-10 | Maragheh · IRI | Rapid | 27 |
| HSTU INDOOR INTER FACULTY Round Robin for Team Tournament | 2026-10-10 2026-10-10 | Dinajpur · BAN | Rapid | 35 |
| 2nd Gauradaha National FIDE Rating Open Chess Tournament-2026 | 2026-10-10 2026-10-12 | Shree Krishna Pranami Mandir, Gauradaha-09, Baigundhara, Jhapa · NEP | Classical | 66 |
| Engr. Jhirov - FIDE Rated Rapid U24 Chess Tournament | 2026-10-10 2026-10-10 | Tacloban · PHI | Rapid | 78 |
| Blitz tournament of Mamedyarov's Chess Club, 2026, N4 | 2026-10-10 2026-10-10 | Baku · AZE | Blitz | 36 |
| Rating tournament dedicated to Baku-the world capital of Sport | 2026-10-10 2026-10-16 | Baku · AZE | Classical | 50 |
| HUN Team League Ch. KEM Region 2nd Div. 2026-27 R 3-4 | 2026-10-10 2026-10-10 | Komarom-Esztergom Region · HUN | Classical | 53 |
| Chess in School and in Mall - Education Day Buzau | 2026-10-10 2026-10-10 | Buzau · ROU | Rapid | 24 |