The US Chess Championships and the European Club Cup were the most important tournaments of the past month, bringing about a number of changes in the rankings of the world's top players. Magnus Carlsen, Hou Yifan, Yagiz Kaan Erdogmus and Alice Lee top the rankings in their respective categories. Meanwhile, Nihal Sarin entered the world top 20 and Hans Niemann dropped below the 2700 mark.