There are lots of different types of slot tournaments. 
https://lists.uoregon.edu/pipermail/coe-test/Week-of-Mon-20240930/000049.html https://thebradgatemagazine.co.uk/pipermail/newsletter_thebradgatemagazine.co.uk/2026-August/000000.html https://leonardo-da-vinci.edu.do/pipermail/padres-madres-tutores_leonardo-da-vinci.edu.do/2024-October/000011.html https://vondstenfabriek.nl/pipermail/v0ndstenfabriek_vondstenfabriek.nl/2025-February/000000.html https://stowdeb.pl/pipermail/test_stowdeb.pl/2025-February/000012.html https://obg21.cz/pipermail/apprentice_obg21.cz/2025-March/000018.html https://dmkproject.pl/pipermail/teeeeee_dmkproject.pl/2025-February/000010.html https://cdweb.pl/pipermail/szkoy_cdweb.pl/2025-February/000012.html https://kassalauni.edu.sd/pipermail/deans_kassalauni.edu.sd/2024-October/000004.html https://rootsschool.edu.pk/pipermail/branchheads_rootsschool.edu.pk/2024-October/000005.html https://pwc-stavanger.no/pipermail/noreply_pwc-stavanger.no/2024-August/000006.html https://kvatlantis.nl/pipermail/feestcommissiejeugd_kvatlantis.nl/2025-February/000139.html https://vict-consultancy.co.uk/pipermail/atprime_vict-consultancy.co.uk/2026-August/000001.html https://lists.uoregon.edu/pipermail/coe-test/Week-of-Mon-20240902/000041.html https://prince.edu.my/pipermail/princeagents_prince.edu.my/2024-October/000003.html https://thedivisions.co.uk/pipermail/newsletter_thedivisions.co.uk/2026-August/000000.html https://paulstadelhofer.de/pipermail/testlist_paulstadelhofer.de/2024-October/000000.html