Increased k-factors strike again: Vincent Keymer (Germany), born in 2004, just gained 152 rating points from a
single 9-game tournament. Now rated 2364 on the March rating list.
If his birthday is 3/1/2004 or later, then I believe he is now the highest rated U11 player in chess history, but if he was born in January or February (and is not U11 anymore) then he still trails Illya Nyzhnyk (2377 rating published when he was 11.02 years old).
Any sleuths out there able to find me young Mr. Keymer's birthday?