KP Astrology
Placidus cusps, star/sub lords, significators and ruling planets.
Krishnamurti Paddhati
KP astrology, developed by Prof. K. S. Krishnamurti, uses Placidus house cusps and divides each nakshatra into nine unequal sub-divisions in the proportion of Vimshottari dasha years. The sub lord of a cusp decides whether the matters of that house will fructify.