The most direct method is to draw lots:
Round 1: Prepare 26 hands (1-26) in pairs (for example, 1 and 2, 3 and 4, 5 and 6). The winner will enter the next round.
The second round: prepare 14 votes, in pairs, and the draw of 14 will automatically enter the third round.
……
etc
This is the most competitive knockout ~
You must win (or avoid) every game to win the championship.
This can motivate students to compete at the highest level.
But it's really cruel (some people think it's unfair), so it's up to you. ...