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Part of the solutions are in Russian, which used to be an international language in the Baltic countries in 1990th. All problems were refined and, if needed, translated by Andreas Päkk, Artemi Smõšljajev, and Vladislav B. Ivaništšev while editing a collection of BChO problems. The previous collection can be found here https://eko.ut.ee/rko/bko

No.	Year	Place	Problems	Solutions	Results
30	2024	Tartu, Estonia	Problems	Solutions	Results
29	2023	Dobele, Latvia	Problems	Solutions	Results
28	2022	Vilnius, Lithuania	Problems	Solutions	Results
27	2019	Tartu, Estonia	Problems	Solutions	Results
26	2018	Riga, Latvia	Problems	Solutions	Results
25	2017	Vilnius, Lithuania	Problems	Solutions	Results
24	2016	Tartu, Estonia	Problems	Solutions	Results
23	2015	Daugavpils, Latvia	Problems	Solutions	Results
22	2014	Vilnius, Lithuania	Problems	Solutions	Results
21	2013	Tartu, Estonia	Problems	Solutions	Results
20	2012	Riga, Latvia	Problems	Solutions	Results
19	2011	Vilnius, Lithuania	Problems	Solutions	Results
18	2010	Tartu, Estonia	Problems	Solutions	Results
17	2009	Riga, Latvia	Problems	Solutions	Results
16	2008	Vilnius, Lithuania	Problems	Solutions	Results
15	2007	Tartu, Estonia	Problems	Solutions	Results
14	2006	Riga, Latvia	Problems	Solutions	Results
13	2005	Vilnius, Lithuania	Problems	Solutions	Results
12	2004	Tartu, Estonia	Problems	Solutions	Results
11	2003	Riga, Latvia	Problems	Solutions	Results
10	2002	Palanga, Lithuania	Problems	Solutions	Results
9	2001	Tartu, Estonia	Problems	Solutions	Results
8	2000	Riga, Latvia	Problems	Solutions	Results
7	1999	Kaunas, Lithuania	Problems	Solutions	Results
6	1998	Tartu, Estonia	Problems	Solutions	Results
5	1997	Vilnius, Lithuania	Problems	Solutions	Results
4	1996	Riga, Latvia	Problems	Solutions	Results
3	1995	Tartu, Estonia	Problems	Solutions	Results
2	1994	Vilnius, Lithuania	Problems	Solutions	Results
1	1993	Riga, Latvia	Problems	Solutions

Throughout  years, the following mentors have edited the problems: Agris Bērziņš, Algirdas Neniškis, Anneli Kruve, Edvinas Orentas, Eduards Baķis, Eugenijus Butkus, Gintautas Bagdžiūnas, Gustavs Mežciems, Ida Rahu, Igors Kļimenkovs, Ināra Akmene, Jānis Briška, Jānis Ăībietis, Juris Fotins, Jörgen Metsik, Kaspars Veldre, Kristi Koitla, Laurynas Riauba, Liis Siigur, Lona-Liisa Pruks, Lukas Šteinys, Marius Jurgelénas, Natalia Nekrassova, Nauris Narvaišs, Olavs Rāciņš, Olga Tšubrik, Ott Kekišev, Raimondas Galvelis, Rein Pullerits, Ritums Cepītis, Rimantas Raudonis, Simonas Balkaitis, Siim Kaukver, Skaidrīte Pakule, Toms Rēķis, Uno Mäeorg, Vaidotas Navickas, Vidmantas Bieliūnas, Vladislav Ivaništšev, Vytautas Kavaliauskas, Vytautas Pečiukėnas and others.