Horoscope Matching - A detailed view

Kalathra Dosham, Rahu Ketu Dosham and Kuja Dosham, Chevvai Dosham known as Mangal Dosham (Mangalik)

Girl's Star (Dinam)
If the girl's star is Mrigasheersham, Makam, Swathi, Anusham and Uthirattathi then you need not look into other details and can immediately select her. These stars are considered to be exceptionally good and so do not require matching of horoscope from other angles. But one MUST check for Kuja Dosham known as Chevvai dosham or Mangalik or Manglik . This is the only condition laid down to chose among the above five Nakshatram known as nakshatra or constellations .

Rajju (Topmost prioritygiven  for this by every Caste. ) 
Matching of Rajju is most important. Star of girl should not be the same or 10th or 19th of boys star. Some same stars are however exceptions viz.    Thiruvathirai,  Makam, Mrigaseersham, Swathi, Anusham & Uthirattathi. Excepting the six stars listed herein, for other stars if Rajju match is not found. then the alliance should be dropped at the first place.  NO SAME RAJJU horoscopes should be matched with the exception to the six stars listed. This is the most vital and important match that one should and must consider, irrespective of Caste. creed or religion

Star
Count from girl's star up to your star and divide the figure by nine. If the reminder is 2,4,6,8 then matching is good. If it is 5 it is tolerable. But if the reminder is 1, 3, 7 then there is no matching.

Rasi (Moon sign)
Your Rasi should be at least 6 counts from that of the girl. The Lord of your Rasi should be friendly one to the Girls Rasi and not an enemy sign to the girl's Rasi.

Yoni (Physical compatibility)

Birth Star

Representing Animal

Bird

Tree

Ganam Or Star Qualities

Aswini / Asvini /Aswinee

Male Horse

Rajali

Etti

Divine

Barani / Bharani

Male Elephant

Crow

Nelli

Human

Karthigai / Krittika

Female goat

Peocock

Athi

Demon

Rohini

He Serpent

Owl

Nawal

Human

Mrigashersham / Mirg

Female Pelican

Hen

Karungali

Divine

Thiruvadharai / Ardra

Male Dog

Sparrow

Shengali

Human

Punarpusam / Punarvasu

Female Cat

Swan

Moongil

Divine

Pusam / Pushya

Female Goat

Water Crow

Arasu

Divine

Ayilyam / Aslesha

Female Cat

Keech Keech

Punnai

Demon

Magam / Makam

Rat

He Eagle

Al

Demon

Puram /Pooram

Female Cat

She Eagle

Palasu

Human

Uthiram /Uthra Palkuni

Buffalos

Woodpecker

Ithi

Human

Hastham / Hastam

Cow Buffalo

Vulture

Athi

Divine

Chtithirai / Chitra

Tiger

Chilwandu

Vilwam

Demon

Swathi / Svathi

Cow Buffalo

Bee

Marutham

Divine

Visakam / Visaka

Tigress

Stork

Kadukkai

Demon

Anusham / Anuradha

Deer

Vanambadi

Magiyam

Divine

Kettai /Jyeshta

Deer

Chakkaravagam

Parai

Demon

Moolam /Mulam

Female Dog

Shembothu

Mango tree

Demon

Puradam /Pooradam

Monkey

Kavuthari

Vanchi

Human

Uthiradam

Mongoose

Valiyan

Pala

Human

Thiruvonam / Sravanam

Monkey

Pelican

Erukku

Divine

Avittam /Danishta

Lioness

Vandu

Valli

Demon

Sadhayam /Sathayam

Female Horse

Dead Black Crow

Kadambu

Demon

Poorattadhi /Purattathi

Lion

Ullan

Thema

Human

Uthirattadhi /Uthrattathi

Cow

Kottan

Vembu

Human

Revathi /Revati

Cow Elephant

Valluru

Iluppai

Divine

The second column in the Table gives the name of animal associated with the star. This is an  indication of compatibility for male/female Yoni of the star. Thus if matching and not that of enemies star, then the couples should enjoy their sexual life to the fullest satisfaction and it makes them more bonded to each other. The Yoni of girl and boy should be of different one in star/animal. Further the animals associated with girl's star should not be that of an enemy star of that of boy's star such as Cow-Tiger, Elephant- Lion, Horse-Buffalo, Serpent-Mongoose, Monkey-Goat, Cat-Rat, Deer-Dog etc. It is easy one can just find the enemy to one another. 

Ganam ( Qualities of Person)
The fifth column in the Table gives the ganam associated with a star. Boy and girl should belong to the same ganam. If boy belongs to 'Angel' ganam, the girl can be of 'Human being' ganam. There will be agreement if boy belongs to 'demon' ganam and girl to 'Human being' ganam'. If the ganam of both boy and girl belong to 'Demon' then the star of boy should be above 14th of girl's star.

Mahaendram : The agreement is good if the count from girl's star to boy's star is 1, 4, 7, 10, 13, 16, 19, 22, 25.

Vasiyam   (Attraction to each other)
Agreement of Rasi for vasiyam known as attraction to each other are given in following Table.

Rasi  Or Moon sign of girl or boy

These signs are attracted Rasi of girl or boy

Mesham

Simham, Vrichikam

Vrishabam

Katakam, Thulam

Mithunam

Kanni

Katakam

Vrichikam, Dhanus

Simham

Thulam

Kanni

Mithunam

Thulam

Makaram, Kanni

Vrichikam

Katakam

Dhanus

Meenam

Makaram

Mesham, Kumbam

Kumbam

Mesham

Meenam

Makaram

Vedai
Stars which are Veddai to each other are given below
Ashvini - Kettai
Barani - Anusham
Karthigai - Vishakam
Rohini - Swathi
Thiruvadharai - Thiruvonam
Punarpusam - Uthiradam
Pusam - Puradam
Ayilyam - Moolam
Magam - Revathi
Pooram - Uthirattadhi
Uthiram - Poorattadhi
Hastham - Sadhayam
Mrigasheersham - Chithirai - Avittam. The boy's star should not be Vedai to girl's star and vice versa

Nadi: 

There are 3 Nadis viz. Parshva Nadi, Madya Nadi, Samana Nadi .The stars belonging to the three Nadis are given below.
Parshva Nadi - Ashvini, Thiruvadharai, Punarpusam, Uthiram, Hastham, Kettai, Moolam, Sadayam, Poorattadhi
Madya Nadi - Barani, Mrigasheersam, Poosam, Pooram, Chithirai, Anusham, Pooradam, Avittam, Uthirattadhi
Samana Nadi - Rohini, Ayilyam, Magam, Swathi, Vishakha, Uthiradam, Thiruvonam, Revathi.
The girl and boy should not belong to the same Nadi.

Chevvai Dosham: (Kuja Dosham or Maglik known as Mangalik)
If Chevvai (Mars) is placed in 7th or 8th house from Lagnam or Chandran ; the horoscope has a strong Chevvai dosham . If Chevvai (Mars) is placed at 7th or 8th house from Sukran (Venus), there is Chevvai dosham but it is slightly milder than earlier. If Chevvai (Mars) is placed at 2nd, 4th, or 12th house from Lagnam, Chandran or Sukran (Venus) there is mild Chevvai dosham . For horoscope agreement, the Chevvai dosham in girl and boy's horoscope should be of matching order. If Chevvai is in 7th or 8th house from Lagnam or Chandran in girl's horoscope, then Chevvai should also be in 7th or 8th house from Lagnam or Chandran in Boy's horoscope for matching. Otherwise, there will be no agreement. If Chevvai is along with Guru or is seen by Guru (5th or 7th or 9th house from Guru), then the degree of Chevvai dosham gets reduced. If Chevvai is in own house or is exalted or debilitated, the Chevvai dosham gets reduced or is not present (according to some).

Rahu/Ketu Dosham:
If Rahu/Ketu is in 7th or 8th house from Lagnam or Chandran, there is Rahu/Ketu dosham. For matching, there should be Rahu/Ketu dosham in both girl's and boy's horoscope or both horoscopes should be free from Rahu/Ketu dosham

Dasa Sandhi:  (Running Same Dasa or Bukthi for both
No dasa in girl and boy's horoscope should change within 6 months of each other within 30years from marriage. If such a conjunction of Dasa occurs, there is Dasa sandhi and the horoscopes should not be matched.  

Kalalthra Dosham or the malefic effects of the 7 th house from a boy or girl's horoscope is discussed here. Please consult your astrologer before deciding the factors as there are numerous exceptions and pariharams are given in the subject.  

The placement of Sukran (Venus), who is known as 'kalathrakarakan' (planet influencing spouse or life partner), should be checked. If it is in 7th house, the horoscope has dosham. It can be matched with only boys having Sukran (Venus) in 7th house.  

If Rahu or Ketu is in 7th or 8th house from Lagnam (Ascendant) or Chandran (Raasi known as moon sign), there is Rahu/Ketu dosham. For a match, there should be Rahu/Ketu dosham in both girl's and boy's horoscope or both horoscopes should be free from Rahu/Ketu dosham  

If in a Girl's horoscope :  

Mangalya Dosham (Death of Husband or Wife) � Planetary alignment and positions that causes early widowhood for girls are stated as under:  

Strong malefic planet in the 8th house in a female horoscope is stated to cause early widow hood. If this malefic who is in the 8th house in female horoscopes is owner of the 7th house, and then widowhood should not be predicted .

When there is a malefic in the 8th house and if the 2nd or 4th house is occupied by strong benefic like Jupiter the wife will predecease the husband, since 8th house aspect by Jupiter even if there are malefic in the 7th house; and if the 8th house in the horoscope of the girl if there is a strong and powerful benefic in her 9th house she will have both good marital life and prosperous children.

If 6 th & 8 th house lords are in conjunction and occupy the 7th house in a female horoscope if moon with no digit strength occupies 7th house as lord of the 6th which will happen only if lagna is Kumbha, if mars and Jupiter occupy 7th or if Saturn is alone in the 7th or if Saturn is alone in the 7th house aspect by 8th lord she will become a widow.

If Saturn is in the 8th house aspect by strong malefic in a female horoscope she may not get married. There are some exceptions if other favorable factors in the horoscope are indicated.  

If in a male horoscope weak moon is in the 5th house from lagna and if lagna, seventh and twelfth houses are occupied by other malefic he will neither have wife nor children.  

If in a male horoscope :  

Saturn in Pisces (Meenam) as 7 th house, and if the Star Sun is in the Lagna he will lose his wife and this can happen only if lagna is in Virgo or Kanni.  

Jupiter is in the 7th in Virgo or Kanni and there are malefic in the 4th house from lagna, the wife will meet with an early death.  

Sun and Venus are conjoined in the 5th, 7th, and 9th house from Lagna; the wife will have deformity of limbs.

Sun and Rahu or Ketu are in the 7th House he will loose all his wealth either through the bad character of his wife or sickly wife.  

If moon and Saturn are in the 7th he will not have progeny. It is also likely that he may not get married.

If lord of the 8th is in the seventh, he will lose his wife very early.  

If Mars and Saturn are in the seventh in Cancer, he will get a good and beautiful wife. This can happen only if the lagna is Makara or Capricorn.  

The lord of the seventh house when placed in the sixth, eighth or twelfth from lagna or ascendant but not in his swakshetram (own sign) or exaltation sign ucha will afflict his wife's health.  

If Venus known as Sukran, The Goddess of Love,  is joined with a malefic planet the persons wife will undergo serious afflictions even to the extent of affecting her longevity the result will be the same if Venus or Sukran occupies her debilitation sign neecha Rasi or an enemy sign or asthagatha combust.  

If Saturn occupies eighth or tenth house in a male horoscope it will afflict his wife's longevity.  

If in a male horoscope Rahu occupies the seventh house from the lagna or ascendant or Venus or the moons sign it is said to cause his wife's death in earlier stage.

The above are a brief compilation of most vital questions that arises while comparing horoscope for marriage match. Please do not just come to conclusion that these are the only things that one need to check or accept. There are many more explanations and exceptions that speaks volume of other matters. Hence it is always suggested to consult an experienced astrologer for other combinations for a suitable star match for vivaha - marriage match.