Library /Bulgarian Spring Tournament

Bulgarian Spring Tournament

19 problems here, rated 4.5 to 7.7 on our scale (AIME to National Olympiad, round 2). 19 of them ask for a proof.

Algebra 6Combinatorics 4Geometry 5Number theory 4

#	Topic	Diff	Type	Year
1	Geometry	4.5	proof	—	open
2	Algebra	4.7	proof	—	open
3	Algebra	4.8	proof	—	open
4	Algebra	4.8	proof	—	open
5	Algebra	4.8	proof	—	open
6	Number theory	4.9	proof	—	open
7	Number theory	4.9	proof	—	open
8	Geometry	5.4	proof	—	open
9	Geometry	5.5	proof	—	open
10	Algebra	5.6	proof	—	open
11	Combinatorics	6.4	proof	—	open
12	Algebra	6.5	proof	—	open
13	Combinatorics	6.5	proof	—	open
14	Geometry	6.5	proof	—	open
15	Combinatorics	6.6	proof	—	open
16	Geometry	6.6	proof	—	open
17	Number theory	6.6	proof	—	open
18	Combinatorics	6.9	proof	—	open
19	Number theory	7.7	proof	—	open

These are sorted by difficulty within the competition, but they aren't a course. The track is the route through, drawn from all the sources at once.