Yes, one can become a professional chess teacher with the right qualifications and experience. Many professional chess teachers have a strong understanding of the game, excellent communication skills, and the ability to teach and mentor students of all ages and skill levels. Some may also have certifications or titles from chess federations or organizations, demonstrating their expertise in the game. Additionally, gaining experience through teaching chess at schools, clubs, or online platforms can help one establish themselves as a professional chess teacher. **

Revlon and NYX cosmetics can be purchased in various drugstores and beauty retailers in Germany. Some popular stores that carry these brands include DM, Rossmann, Douglas, and Müller. Customers can also find a selection of Revlon and NYX products online on websites such as Amazon.de and the official brand websites. **

Revolution refers to a drastic and fundamental change in society or a particular system, often involving violence or upheaval. On the other hand, Revlon is a well-known American multinational cosmetics company that specializes in beauty and personal care products. The main difference between the two is that Revolution is a term related to significant societal change, while Revlon is a brand name associated with beauty products. **

UNIQ disbanded due to various reasons, including the members' desire to pursue individual activities and careers. Additionally, the group faced challenges in terms of promotions and activities, which may have contributed to their decision to disband. Despite their disbandment, the members have continued to pursue their respective careers in the entertainment industry, with some focusing on acting and solo music endeavors. **

As of my last knowledge update, UNIQ is still considered an active K-pop boyband. However, they have been on a hiatus from group activities for a few years, with members pursuing individual projects and activities. It is unclear when they will make a comeback as a group, but they have not officially disbanded. Fans continue to support and anticipate their return as a group. **

Revlon products can be purchased in Germany at various drugstores, beauty supply stores, and online retailers. Some popular places to find Revlon products in Germany include DM, Rossmann, Douglas, and online platforms like Amazon and Flaconi. Additionally, Revlon products may also be available at select department stores and specialty beauty shops throughout Germany. **

One becomes a grandmaster in chess when they achieve three grandmaster norms and a FIDE rating of at least 2500. Grandmaster norms are earned by achieving a high level of performance in designated chess tournaments, and they must be approved by the World Chess Federation (FIDE). Once a player meets these criteria, they are awarded the title of grandmaster, which is the highest title a chess player can achieve. **

To checkmate the king in chess, you need to put the opponent's king in a position where it is under attack and cannot escape capture. This can be achieved by using your pieces strategically to control key squares around the opponent's king, limiting its movement. By creating a situation where the opponent's king has no legal moves to escape capture, you have successfully checkmated the king and won the game. **