At a checkers tournament there where 64 players. it was elimatation tournament. how many games where played before there was a winner

So first game
half were eliminated
we notice a pattern
first game=64 times 1/2
next game 32 times 1/2 so

so just multiply by 1/2 till you get 1
round 1 64/2=32
round 2  32/2=16
round 3  16/2=8
round 4  8/2=4
round  5 4/2=2
round 6  2/2=1

6  is the answer