diff --git a/db_compare.py b/db_compare.py
index 6e594d5f..8ee613e6 100644
--- a/db_compare.py
+++ b/db_compare.py
@@ -234,6 +234,42 @@ def check_novinky():
 			raise ValueError("Nesedi autori u novinek")
 			
 
+# Problémy jsou rozdělené podle typů:
+def check_uloha():
+	raise NotImplementedError()
+def check_tema():
+	raise NotImplementedError()
+def check_konfera():
+	old_query = "SELECT * FROM seminar_problemy WHERE typ = 'konfera'"
+	new_query = "SELECT * FROM seminar_konfera JOIN seminar_problemy as problem ON problem_ptr_id = problem.id"
+
+	oldcur.execute(old_query)
+	newcur.execute(new_query)
+
+	if oldcur.rowcount != 0 or newcur.rowcount != 0:
+		raise ValueError('There exists a Konfera!')
+
+def check_org_clanek():
+	old_query = "SELECT * FROM seminar_problemy WHERE typ = 'org-clanek'"
+
+	oldcur.execute(old_query)
+
+	if oldcur.rowcount != 0:
+		raise ValueError('There exists a Org-clanek!')
+
+def check_res_clanek():
+	raise NotImplementedError()
+
+def check_untyped_problem():
+	old_query = "SELECT * FROM seminar_problemy WHERE typ NOT IN ('uloha', 'tema', 'serial', 'konfera', 'org-clanek', 'res-clanek')"
+
+	oldcur.execute(old_query)
+
+	if oldcur.rowcount != 0:
+		raise ValueError('There exists a Problem without type!')
+
+
+
 check_skola()
 check_resitel()
 check_reseni()
@@ -246,3 +282,10 @@ check_soustredeni_ucastnici()
 check_soustredeni_organizatori()
 check_nastaveni()
 check_novinky()
+
+check_uloha()
+check_tema()
+check_konfera()
+check_org_clanek()
+check_res_clanek()
+check_untyped_problem()