A relationship between two individuals can be determined if a common ancestor has been identified.
Both lines begin with the common ancestor, shown on the chart as number 1.  For the first individual,
move up the A' column on the far right until you locate his/her relationship to the common ancestor. 
For the second individual, move down the B' column on the far right until you locate his/her relationship
to the common ancestor.  Now trace the green and white lines to the box on the left.  The correct
legal relationship is shown where the bands intersect.
For example, A4 and B4 are 2nd cousins.   By the same token, if A2 were the daughter of  
the common ancestor and B5 was the common ancestor's great-great granddaughter, then B5 would be
A2's second great niece.
C=  Cousin
N=  niece or nephew to uncle or aunt.
GN=  Great niece or nephew.
2C/1R=  second cousins, once removed.
3C/4R=  third cousins, four times removed.
  A10    7 great grandson/daughter
   A9    6 great grandson/daughter
     A8    5 great grandson/daughter
     A7    4 great grandson/daughter
         A6   3 great grandson/daughter
       A5    gr - great grandson/daughter
           A4    great grandson/daughter
         A3    grandson/daughter
           A2    son/daughter
A10 A9 A8 A7 A6 A5 A4 A3 A2   1     COMMON ANCESTOR
7GN 6GN 5GN 4GN 3GN 2GN GN N siblings  B2    son/daughter
1C/7R 1C/6R 1C/5R 1C/4R 1C/3R 1C/2R 1C/1R  1st C N  B3    grandson/daughter
2C/6R 2C/5R 2C/4R 2C/3R 2C/2R 2C/1R 2nd C 1C/1R GN  B4    great grandson/daughter
3C/5R 3C/4R 3C/3R 3C/2R 3C/1R 3rd C 2C/1R 1C/2R 2GN  B5    gr - great grandson/daughter
4C/4R 4C/3R 4C/2R 4C/1R 4th C 3C/1R 2C/2R 1C/3R 3GN  B6    3 great grandson/daughter
5C/3R 5C/2R 5C/1R 5th C 4C/1R 3C/2R 2C/3R 1C/4R 4GN  B7    4 great grandson/daughter
6C/2R 6C1R 6th C 5C/1R 4C/2R 3C/3R 2C/4R 1C/5R 5GN  B8    5 great grandson/daughter
7C/1R 7th C 6C/1R 5C/2R 4C/3R 3C/4R 2C/5R 1C/6R 6GN  B9    6 great grandson/daughter
8th C 7C/1R 6C/2R 5C/3R 4C/4R 3C/5R 2C/6R 1C/7R 7GN B10   7 great gramdson/daughter