Let Me Explain:
A adoption match is a match usally consists on 10 rounds. With A signifcantly better player VS a signifcant weaker player.
EXAMPLE:
RandomPerson(ELO 1568) VS RandomPerson 2 (ELO 2312)
In order to win, the stronger player must 10-0 the weaker player.
For the weaker player a draw is sufficent to win the entire match because the stronger player did not win all his games.
This could be in anytime control, bullet, blitz, rapid.
NOTE: If you want to adopt someone in chess, chose a low rated opponent, obviously, because if you play someone your level, how can you beat them 10-0?
if you beat someone 10 times in a row thats adoption nothing really happens but if youve adopted a lot of people you can start a foster home club for the people youve adopted as a joke lol