Magnus Carlsen, Viswanathan Anand, and Anish Giri are all world-class chess players, but Magnus Carlsen is currently the best chess player in the world. He has been the World Chess Champion since 2013 and has held the number one ranking in the FIDE rating list since 2011. Carlsen is known for his exceptional positional understanding, his ability to calculate complex variations, and his calm and collected demeanor under pressure.
Viswanathan Anand is a former World Chess Champion (2007–2013) and one of the most respected chess players of all time. He is known for his deep understanding of chess theory and his ability to adapt his style to different opponents. Anand is also a very creative player and is known for his ability to find unexpected tactical opportunities.
Anish Giri is a Dutch chess grandmaster and one of the top ten players in the world. He is known for his aggressive style of play and his ability to create attacking chances. Giri is also a very strong positional player and is known for his ability to grind out wins in difficult positions.
In terms of current strength, Magnus Carlsen is the clear leader of the three players. He has a significant rating advantage over both Anand and Giri, and he has a much better head-to-head record against both players. Carlsen is also the reigning World Chess Champion, which is a testament to his current dominance in the chess world.
However, both Anand and Giri are still very strong players and are capable of beating any opponent on their day. Anand is a former World Chess Champion and has a wealth of experience at the highest level of chess. Giri is one of the most promising young players in the world and is constantly improving his game.
Overall, Magnus Carlsen is the best chess player in the world right now, but Viswanathan Anand and Anish Giri are both very strong players who are capable of beating anyone on their day.