Hayanaratna · by Balabhadra
Chapter 1 · Planets, Signs, Year Entry
ग्रहराशिस्वरूपवर्षप्रवेशाद्यानयनाधिकारः
अथ भावविंशोपकानयनमुक्तं मुक्तावल्याम्॥ग्रहसन्ध्यन्तरं भावसन्ध्यन्तरविभाजितम्॥लब्धं भावफलं ज्ञेयं तत्रिभागो विशोपकाः॥ ॥
Now finding the house vishopaka (twentieth part), as told in the Muktavali. Divide the gap between the planet and the sandhi (junction between two houses) by the gap between the house and the sandhi. The result is the house result. One-third of it is the vishopakas.
Simple meaning: House score: gap from planet to junction, divided by gap from house to junction. A third of it is the score out of 20.
अत्रान्तकरणे विशेष उक्तः पद्धतौ ।
Which junction to use: planet before the middle of the house, use the first junction; past it, use the later junction.
भावतस्तु फलं सर्वं जन्मवर्षव्रतादिषु ॥
House scores for all charts: birth, year, rites, journeys, questions and building.
अथ कीदृशो भावो ग्रहसंयोगेन शुभाशुभं वा फलं प्रयच्छतीत्युक्तं ताजिकतिलके॥
House with its lord, Jupiter, Mercury or Venus: joined with and seen by them, full results. With other planets, not.