Format
Each match is compose of two sets; each of them is race to 5 and in alternate break. Players lag to determine who shall break in the first set. The player who loses that set will break in the second.
A 30-second shot clock rule of is used. This means a player must make a shot within 30 seconds lest the other player will receive ball-in-hand. Each player, however, can call for an extension but only once per rack.
Unlike other nineball tournaments, a player must call the 9-ball before pocketing it. Failing to call the shot or the 9-ball going in another pocket other than the one called will result the 9-ball being respotted and the player loses his turn at the table. Also, a player can't win a rack by pocketing the 9-ball in the break.
To win a match, a player has to win both sets. If the sets are split (one player winning the first but other player winning the next), players again lag to break at the one rack decider.
Read more about this topic: International Challenge Of Champions