A tournament where every team plays with every other team once and the no. of matches is determine with the help of N(N-1)where N stands for no. of teams participating in the tournament.

A tournament where a team once defeated automatically gets eliminated from the tournament and only the winning team continues. The defeated team is not given a second opportunity.

In a knock-out tournament, a good team eliminated in the first round gets a setback. One additional chance is given to the defeated team depending upon the organizers wish. In this tournament, the winner is declared from the defeated team.

Extramural means the activates organized by an institution/school and the participants of two or more schools/intuitions participate in the extramural competitions are also called inter-school/intercollege/inter-university competitions.

If the total number of teams are not in power of 2 like 2, 4, 8,16,32,64, etc., the total number of teams minus the next highest power of two are given bye. The teams given the byes get an opportunity to play directly in the second round of the game. The formula for bye is:

No. of teams – next highest power of 2= no. of byes.

$$\begin{gathered} \mathrm{No}. \mathrm{of} \mathrm{byes} \mathrm{in} \mathrm{the} \mathrm{upper} \mathrm{half} = \frac{{\mathrm{N}}_{\mathrm{B}} + 1}{2} \\ \mathrm{No}. \mathrm{of} \mathrm{byes} \mathrm{in} \mathrm{lower} \mathrm{half} =\frac{{\mathrm{N}}_{\mathrm{B}} + 1}{2} \end{gathered}$$