1) Make a composite of your natal chart and the city natal (mundane) birth chart
OR if you can't find the city's natal (mundane) birth chart, then:
-erect a birthchart for yourself using your original time and date of birth but use the new city as the location (place) of your birth.
2) In the composite (or the "new birthplace") chart, find the Part of Love & Marriage in that chart (formula ascendant + jupiter - venus)
3) Now, having found the Part of Love & Marriage (POLM) in the chart:
a) make 3 columns: one headed "unlikely", one headed "maybe", one headed "likely"
b) now evaluate the indications regarding the POLM:
1) if the POLM is in the 1st, 4th, 5th, 7th or 10th house, check the "likely" column
2) if the POLM is in the 6th, 8th or 12th house check the "unlikely" column
3) if the POLM is in the 2nd, 3rd, 9th or 11th house check the "maybe" column
4) if the North Node is in the same sign as the POLM check the "likely" column
5) if the South Node is in the same sign as the POLM check the "unlikely" column
6) if neither Node is in the same sign as the POLM check the "maybe" column
7) if the POLM is in the domicile or exaltation sign of Venus (Taurus, Libra, Pisces) check the "likely" column
8) if the POLM is in the detriment or fall sign ofVenus (Aries, Scorpio, Virgo) check the "unlikely"column
9) if the POLM is not in either a detriment, domicile, fall or exaltation sign of Venus, check the "maybe" column
10) if Venus is in the same sign as the POLM, or if Venus is in a sign trine or sextile or semi-sextile BY SIGN, to the sign of the POLM, check the "likely" column
11) if Venus is in the opposite sign to the sign of the POLM, or if Venus is in a sign square or quincuncx BY SIGN to the sign of the POLM, check the "unlikely" column
12) total the checks in each column: whichever column (likely, unlikely, maybe) has the highest number of checks, indicates whether finding love and marriage at the location will be likely, or unikely, or a mixed (50/50) proposition...