How to understand Mutual Relationship between Planets?

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Understanding Mutual Relationship between Planets

According to Satyacharya, the lord of the Rasis falling in the 2nd, 4th, 5th, 8th, 9th and 12th from the Mulatrikona of a Graha (Planet) are friendly to that Graha.

The Mulatrikona of various grahas are as follows :

Sun: Leo (Simha)
Moon: Taurus (Vrishabh)
Mars: Aries (Mesha)
Mercury: Virgo (Kanya)
Jupiter: Sagittarius (Dhanu)
Venus: Libra (Tula)
Saturn: Aquarius (Kumbh)

Some other rules about Mulatrikona of grahas (planets) :

All planets excluding Mercury and Moon have their Mulatrikona in the odd sign owned by them.
Mercury and Moon have their Mulatrikona in even sign. Both this grahas attain their Uccha Or Exaltation in their Mulatrikona Rasi.
Moon is the only Planet whose Mulatrikona falls in a sign Not owned by itself. (Moon has its Mulatrikona in Taurus owned by Venus)

Classification into 6 fold mutual relationships

There are 21 pairs of relationships among the Saptagrahas (7 Planets), out of which 6 are mutual love, 4 are one-sided love, 1 is love and hatred, 2 are complete indifference, 5 are one-sided hatred, and 3 are mutual hatred.

Love-Love: Sun-Moon, Sun-Mars, Sun-Jupiter, Mars-Jupiter, Mercury-Venus, Venus-Saturn.
Love-Neutral: Mercury-Sun, Mars-Moon, Jupiter-Moon, Saturn-Mercury.
Love-Hate: Moon-Mercury.
Neutral-Neutral: Mars-Venus, Jupiter-Saturn.
Hate-Neutral: Venus-Moon, Saturn-Moon, Saturn-Mars, Jupiter-Mercury, Jupiter-Venus.
Hate-Hate: Sun-Venus, Sun-Saturn, Mars-Mercury.

https://malcolm-en-gb.s3.eu-west-1.amazonaws.com/instances/DvZkFKum7i/resources/NMwSJ3smmu/2.jpg (planet_relationships_english.jpg)

Rule for Reading these relationships: Let us take Moon-Mercury’s relationship to demonstrate this. We note above that this relationship is classified as Love-Hate. Moon-Mercury’s love-hate relationship means Moon loves Mercury while Mercury hates Moon. Similarly, Venus-Moon’s Hate-Neutral relationship means Venus hates Moon while Moon is neutral towards Venus.

Some other important Points for deeper insights into these Relationships:

Moon is mildly inimical towards Mars as Moon is debilitated in the 7H making it doubly inimical towards Scorpio.
Mercury is mildly inimical towards Jupiter as Mercury is debilitated in the 7H making it doubly inimical towards Pisces.
Jupiter is mildly inimical towards Saturn as it is debilitated in the 2H making it neutral towards Capricorn instead of friendly towards it.
Venus is mildly friendly to Mercury as it is debilitated in the 12H making it neutral towards Virgo.
Saturn is extremely friendly towards Venus as it is exalted in 9H making it doubly friendly towards Libra.

https://malcolm-en-gb.s3.eu-west-1.amazonaws.com/instances/DvZkFKum7i/resources/wLJNNmMDw6/1.jpg (planet_relationships_sanskrit.jpg)

BPHS 3.55: Note the Rāśis, which are the 2nd, 4th, 5th, 8th, 9th and 12th from the Mulatrikona of a Graha. The Grahas ruling such Rāśis are its friends, apart from the Lord of its exaltation Rāśi. Lords other than these are its enemies. If a Graha becomes its friend as well, as its enemy, then it is neutral.

Understanding the Priciple in Deepth (Note : Indian name for planets and signs are used)

According to this principle, the the owner of the signs falling in the Upachaya 3H-6H-10H-11H and Saptama 7H, from the mulatrikona Rasi of a graha are its enemies. Lets take Kuja whose Mulatrikona is Mesha. Counting from Mesha, the enemies should be the lords of Mithuna (3H), Kanya (6H), Makara (10H) and Kumbha (11H) as well as Tula (7H). Hence, the enemies of Kuja should be Budha (Mithuna, Kanya), Shani (Makara, Kumbha) and Shukra (Tula). However, there is a catch. Shani can’t be Kuja’s enemy as Makara is the Uccha Rasi of Kuja. Similarly, Shukra’s other Rasi Vrsha is placed in the 2H from Mesha. Thus, the only enemy is Budha, while Shani and Shukra should be neutral. The remaining i.e., Guru, Surya and Chandra should be Kuja’s friends.

**Using this logic, the friendship and enmity of grahas are as follows: **

Surya (Simha): Surya is friendly towards Chandra (12), Guru (5-8) and Kuja (4-9). Surya is inimical towards Shani (6-7), Shukra (3-10). Surya is neutral towards Budha (2-11).
Chandra (Vrishabh): Chandra is friendly towards Surya (4) and Budha (2-5). Chandra is neutral towards Kuja* (7(deb)-12), Guru (8-11), Shukra (1-6), and Shani (9-10). Chandra is inimical to none.
Kuja (Mesha): Kuja is friendly towards Surya (5), Chandra (4), Guru (9-12). Kuja is inimical towards Budha (3-6). Kuja is neutral towards Shani (10(exalt)-11), Shukra (2-7).
Budha (Kanya): Budha is friendly towards Shukra (2-9) and Surya (12). Budha is inimical towards Chandra (11) and Kuja (3-7). Budha is neutral towards Guru* (4-7(deb)) and Shani (5-6).
Guru (Dhanu): Guru is friendly towards Surya (9), Chandra (8), Kuja (5-12). Guru is inimical towards Budha (7-10) and Shukra (6-11). Guru is neutral towards Shani* (2(deb)-3).
Shukra (Tula): Shukra is friendly towards Budha* (9-12(deb)) and Shani (4-5). Shukra is inimical towards Surya (11), Chandra (10). Shukra is neutral towards Kuja (2-7) and Guru (3-6(exalt)).

How to understand Mutual Relationship between Planets?

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