In brief
The compatibility matrix is the shared Destiny Matrix of two people: each number of one personal matrix is added to the same number of the other, and a sum over 22 is reduced by adding digits, so any number in it is one of the 22 arcana. The main number is the couple's center: for example, personal centers 7 and 9 give 16. You need only two dates of birth, time and city do not take part. The method author's book has no pair matrix — it is an extension by schools, and it has no evidence base.
What the compatibility matrix is and whose method it is
The Destiny Matrix is an author's method by Natalia Ladini, created around 2006. It is not an ancient system: it has a documented ancestor — the Western tarot numerology of birth of the 1970s–80s (Angeles Arrien, Mary Greer), where the day, month and year were likewise added and the sum reduced to a number no greater than 22.
The method's main source is the author's book “Destiny Matrix. The Primary Source” (2024). Its calculation part takes pages 229–242 and ends with the health chart. There is no pair matrix there at all: a search for the words “parn,” “sovmestim,” “dvoikh” (Russian roots for “pair,” “compatib-,” “of the two”) finds nothing. The rule “add two charts point to point” is taken from the practice of schools and live calculators.
So the article has two kinds of statements. The arithmetic is checkable: every number below can be recalculated on paper. The interpretation is only in the form “this is how practice describes it.” For it, there is a test at the end that can be failed.
How to calculate the compatibility matrix from two dates
Step one — two personal matrices. For each date you need three base numbers. The day is as it is if it's not more than 22, otherwise its digits are added: 29 gives 11. The month is always as it is, November stays 11. The year is the sum of four digits, reduced to 22. The bottom corner is the sum of the three base ones, the center is the sum of all four.
An example — September 11, 1977 and November 29, 1985; this pair serves as the reference in our engine's tests. The first date: day 11, month 9, year 1 + 9 + 7 + 7 = 24 → 6. Bottom corner: 11 + 9 + 6 = 26 → 8. Center: 11 + 9 + 6 + 8 = 34 → 7. The second date: day 29 → 11, month 11, year 1 + 9 + 8 + 5 = 23 → 5. Bottom corner: 11 + 11 + 5 = 27 → 9. Center: 11 + 11 + 5 + 9 = 36 → 9.
Step two — addition point to point. Day with day: 11 + 11 = 22, stays 22. Month with month: 9 + 11 = 20. Year with year: 6 + 5 = 11. Bottom corner: 8 + 9 = 17. Center: 7 + 9 = 16. The other points are added the same way: the couple's integral strength — 21 + 18 = 39 → 12, the Power of the Lineage — 14 + 9 = 23 → 5.
On the compatibility page of the My Seven Charts site (svoya-karta.ru) the shared matrix is calculated next to the rest of the couple's reading: the couple's center, the Power of the Lineage, the integral strength and three lines. The block is labeled “an extension of the method, not in the book,” and the caveat under it comes from the engine together with the numbers.
What is called the compatibility arcanum and how many variants there are
There is no single definition: different sites give that name to different numbers. In our calculation, the closest to it is the couple's center — that very 16 from the example. Two more numbers stand beside it, the Power of the Lineage and the integral strength, but the center is the only number that is usually singled out.
There are few variants, and this can be counted. We took 200,000 random pairs from dates of 1950–2010. The couple's center takes 20 values, from 3 to 22; one and two never come up. The most frequent center is 16: it came out for 9.5 percent of pairs, almost every tenth. Together 15, 16 and 17 cover 28 percent of pairs, and the rarest, 3 and 4, 0.3 percent each.
The code 1 doesn't appear anywhere in the shared matrix, not just in the center: the smallest sum of two numbers is 1 + 1. And the couple's center almost never coincides with the personal center of either person: on the same 200,000 pairs, in half a percent of cases. The sober conclusion: a couple's arcanum is not a portrait of a relationship but a cell of a table shared by many other couples.
Why compatibility matrix calculators give different numbers
The first fork is the method of addition. Ours: each point of the shared matrix is the sum of the same points of the two personal ones. Another method looks neater: add point to point only the four corners — day, month, year and bottom corner — and derive the center and other points inside the pair matrix by the usual rules. For the example pair it gives the center 22 + 20 + 11 + 17 = 70 → 7 instead of 16. A check via the remainder of division by 9 can't tell these two methods apart: their remainder is always the same, and 7 and 16 are exactly such a case.
The methods diverge not occasionally. On the same 200,000 random pairs the second method gives a different center in 68 percent of cases. We don't use it: the “point to point” rule is taken from live calculators, while the second method, already on the reference pair, differs from it in the center and in several other points.
A consequence of our method: the shared matrix is not self-consistent. The couple's bottom corner is not equal to the sum of the couple's day, month and year: 22 + 20 + 11 = 53 → 8, while the matrix has 17. This is not a calculation error but a property of the “point to point” rule.
The second fork is the reduction rule: some calculators subtract 22 instead of adding digits, and then everything diverges, including the personal charts. How to catch this is covered in a separate article, linked at the bottom. A quick check of any calculator: the couple's center must equal the sum of the two personal centers, reduced to 22.
The couple's lines: money, love and the shared tail
Besides the center, the shared matrix shows three lines of three numbers each. They are not in the author's book either. The points of each line are calculated in the personal matrices and added point to point, not derived inside the pair one. For the example pair, the money line is 9-6-15, the love line is 6-12-15.
The shared tail is the sum of the two karmic tails. The first date has the tail 15-5-8, the second 18-9-9. From top to bottom: 15 + 18 = 33 → 6, 5 + 9 = 14, 8 + 9 = 17. The shared tail is 6-14-17. The bottom number always equals the sum of the two personal bottom corners.
On the page the labels for the lines are these: money — what the couple's conversation about money is about and where it stumbles; love — what closeness goes through and what it usually lacks; the shared tail — what you will have to work through together rather than separately. These are the site's wordings in the spirit of the practice, not an established fact: the lines predict neither income nor events in the couple.
What the compatibility matrix won't tell you
It doesn't answer the question “do we suit each other.” There is no compatibility score or percentage in it, nor “good” and “bad” centers: these are numbers obtained by addition. If a calculator writes “compatibility 87 percent” from one matrix, that is its own scale, and where it came from is worth asking it.
It doesn't predict a wedding, a breakup or a couple's money. Nothing allows claiming that from the sum of two dates, and we don't write it. The honest question to the matrix is a different one: does the text for your center describe your couple specifically — better than the text for someone else's. That can be tested.
How to test it on yourselves: 28 days of notes and a threshold of 3 of 3
This test is for two, so here the address is “you” in the plural. Step one — before reading the descriptions. For four weeks, together, write down every case when a familiar theme repeated in the couple — an argument, a coming closer, the same “again.” The date, what happened, what each did. Facts only, no explanations. At least six notes are needed; if fewer were collected, the test did not take place, it is neither “yes” nor “no.”
Step two — on day 29, with a helper. The helper calculates the three numbers of the couple — the center, the integral strength and the bottom number of the shared tail — and doesn't name them. For each he takes from the code guide the paragraph “What it looks like in ordinary life,” adds the same paragraphs of two outside codes — not from your three and each time different ones — removes the numbers and titles, and shuffles. This makes three triples. A caveat: these paragraphs are written about one person, and are applied to a couple only for the sake of the test.
Step three: in each triple, together choose the paragraph that most of your notes fit. The threshold — 3 of 3: at random this comes out in one case in 27. Two of three — a fail: by chance two or more come up in 7 cases of 27. If the couple's numbers repeat and there are two triples, the threshold is 2 of 2, which is one case in nine; if there is one triple, the test did not take place.
A fail means: the descriptions do not tell your couple from others, and in this form the compatibility matrix is not about you. And 3 of 3 is not proof of the method, but one passed test. The arithmetic is easier to check: recalculate the couple's center on paper and compare with the calculator — a discrepancy means an error in one of the two calculations.