This short text by Sakya Pandita Kunga Gyaltsen (1182–1251) explains ganachakra practice from the Sakya perspective according to the traditions of the Hevajra and Chakrasamvara tantras. It is among the earliest Tibetan commentaries on the subject but was originally composed to clarify an even earlier work by Jetsün Drakpa Gyaltsen (1147–1216).
