Tags like…
Tactics, Tesuji, Strategy, Theory, Opening, Joseki, Fuseki, Attack, Defense,
Or even subgenres
Opening (Joseki, Fuseki)
Tactics (Honte, Proper, Common, Shape)
Technique (Tesuji, Haengma, Tsumego)
Strategy (Attacking, Defending, Invasion, Reduction, Theory)
Endgame (Counting, Calculation)
Miscellaneous (Assorted, Untagged)