CLEAN : France: Centrist Macron rediscovers his roots on ski trip

The video tutorial covers a range of topics, starting with initial thoughts and context setting. It then moves on to discuss defensive strategies and observations, followed by exploring easier solutions and various circumstances. The final section focuses on audition practice and accuracy, providing insights into improving performance and understanding different scenarios.

What does the speaker mean by 'solid nickel on this on solution'?

What can be inferred about the audition practice mentioned?