| Dates | Event name | Location |
|---|---|---|
| 4–15 Oct 2025 | European Teams Chess Championship 2025 | Batumi, Georgia |
| 9 Oct 2025 | FIDE RATED Blitzmania part 2 (10 rounds of 3+2) at Bangor Chess Club | Bangor, Co. Down, Northern Ireland |
| 10 Oct 2025 | FIDE RATED U1700 Friday Blitz (8 rounds of 5+3) at Bangor Chess Club | Bangor, Co. Down, Northern Ireland |
| 11 Oct 2025 | FIDE RATED Co. Down Junior Championships 2025 U8-U18 (at 100% capacity) | Bangor, Co. Down, Northern Ireland |
| 12 Oct 2025 | Solas Irish Cancer FIDE Rapid Tournament | Dublin Road Business Park, Bracklone, Portarlington, Co. Laois, R32 RPX8 |
| 16 Oct 2025 | FIDE RATED Bangor Chess Club 60th Anniversary Classic: Round 1 | Bangor, Co. Down, Northern Ireland |
| 16–19 Oct 2025 | Dun Laoghaire CC 50th Anniversary Tournament of Champions | Rochestown Lodge Hotel |
| 17–19 Oct 2025 | The Éanna Classic 2025 | Coláiste Éanna, Ballyroan, Rathfarnham, Co Dublin |
| 18 Oct – 20 Dec 2025 | Galway Autumn Tournament (FIDE rated) | Galway Bridge Centre, Galway H91 C2C3 |
| 19 Oct 2025 | Shannon Rapidplay October 2025 | Oakwood Hotel, Shannon, Clare |
| 21 Oct 2025 | Antonina Gora Coaching and Promoting Women's chess in Skerries | Skerries Amalgamated Bridge Clubs, 73B Strand Street, Skerries, Co. Dublin, K34 C951 |
| 23 Oct 2025 | FIDE RATED Bangor Chess Club 60th Anniversary Classic: Round 2 | Bangor, Co. Down, Northern Ireland |
| 24–27 Oct 2025 | The Irish Women's Chess Championship 2025 | Talbot Hotel Stillorgan, Stillorgan Rd, Stillorgan, Dublin |
| 25 Oct 2025 | Grandmaster school of chess October FIDE rated rapid U16 | St Conleths college, Clyde road, ballsbridge, Dublin |
| 25 Oct 2025 | Halloween Rapid Junior Chess Tournament | O'Shea's/Forge (Upstairs) Wicklow Town A67 TR25 |
| 25 Oct 2025 | Malahide Rapid | St. Sylvester's Parish Centre, Malahide |
| 27 Oct 2025 | Inaugural Irish Women’s Chess Festival 2025 | Talbot Hotel Stillorgan, Stillorgan Rd, Stillorgan, Dublin |
| 27 Oct 2025 | Monday Bank Hol Rapid and Blitz - FIDE Rated | Stillorgan Talbot Hotel, Co Dublin |
| 28–31 Oct 2025 | GM Alex Baburin's Mid term Chess camp | St Michael's College Junior school, Merrion, Co.Dublin |
| 28 Oct – 8 Nov 2025 | European Youth Chess Championship 2025 | Budva, MNE |
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