Title (only) inspired by Don't bully your little sister at chess

Prologue

Well, this happened when I played Reversi with my cousin a few days ago...

I, not being as nice as @Arnold :P, I decided to continue to bully my cousin, but to cut her pain.

Rules

• Each move, no matter white or black, must capture pieces
• This is a circumstance where your enemy is not a perfect logician, (like my cousin XD), so you may assume that your opponent is helping you.
• You can choose beinhg white or black.

The Puzzle

Create a circumstance of X-0 or 0-X with minimum X.

Tier-breaker

Less steps needed wins

OP's Words

reversi is temporary. Please feel free to retag for me. Thanks!