Competition

noun a hybrid sport that combines the board game of chess with the combat sport of boxing

• Chess boxing is a unique sport that combines the strategy of chess with the physicality of boxing.
• Have you ever heard of chess boxing? It's like the ultimate brain and brawn challenge!
• Chess boxing is for those who want to flex both their muscles and their minds at the same time.
• In life, sometimes you have to play a game of chess boxing, balancing intellect and strength to overcome challenges.

noun a competitive activity involving solving Rubik's cubes as quickly as possible

• Speedcubing is a competitive sport where participants solve Rubik's cubes as quickly as possible.
• I've been practicing speedcubing and I'm getting faster every day!
• Speedcubing is my jam, I can solve a cube in under 20 seconds!
• In the world of speedcubing, solving a cube in less than 10 seconds is like reaching the pinnacle of success.

noun a person, group, or force that opposes or attacks; opponent; enemy; foe

• The company's legal team is prepared to handle any challenges posed by their adversaries in court.
• We're not worried about our adversaries, we've got this.
• Those adversaries don't stand a chance against us.
• In the game of chess, the king must always be protected from the attacks of its adversaries.