It appears that you are asking for evaluation criteria for the promotion of students from blue belt to purple belt since you mention going from white to blue belt first. Here are some evaluation criteria for promoting students from blue belt to purple belt in Brazilian Jiu-Jitsu:

1. Technical proficiency: The student should have a deep understanding of the essential techniques, positions, and transitions, and be able to execute them efficiently.

2. Breadth of techniques: The student should have a broad repertoire of techniques, including takedowns, submissions, sweeps, guard passes, and defenses, catering to both gi and no-gi situations.

3. Strategy and tactics: The student should display the ability to apply strategic thinking and appropriate tactics, such as adjusting their game plan based on their opponent's strengths, weaknesses, and tendencies.

4. Consistency in training: The student should demonstrate commitment by attending classes consistently, regularly drilling techniques, and engaging in live sparring or rolling sessions.

5. Mat time: The student should have spent a significant amount of time training as a blue belt. Each academy may have different requirements, but it's common for a student to spend at least two years as a blue belt before promotion.

6. Teaching and mentoring: A purple belt student should be capable of teaching and helping lower-ranked students, contributing to the growth and improvement of the academy and the students within it.

7. Competitions and achievements: Although not required for everyone, participating and succeeding in competitions can indicate that a student is ready for a purple belt, showcasing their technical abilities, strategy, and performance under pressure. 
8. Mindset and attitude: A purple belt should have a mature, respectful attitude and be humble, showing a willingness to learn from mistakes and grow both as a martial artist and as an individual.

Keep in mind that different Brazilian Jiu-Jitsu academies and instructors have varying criteria and expectations, but these are some common factors to consider for promotion from blue belt to purple belt.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence