Belfast, 1912—
- 2010-2019
- 2016 Gareth Annesley; January 9-10; 8 players, 6 rounds, 20 games (18 available)
- 2019 Gábor Horváth; January 19-20; 9 players, 6 rounds, 24 games (all available)
- 2020-
- 2020 Gareth Annesley; January 18-19; 17 players, 5 rounds, 39 games (20 available)
- 2021 No event
- 2022 Mandar Tahmankar; February 4-6; 13 players, 5 rounds, 28 games (all available)
- 2023 Mandar Tahmankar
- 2024 Mandar Tahmankar
- 2025 Mandar Tahmankar
- 2026 Mandar Tahmankar; January 23-25; 35 players, 5 rounds, 83 games (30 available)
- References:
- Williamson Shield, Irish Chess History web site.
Last updated January 28, 2026.