Carissa, who's 11, has become the youngest ever chess master in the US.
So how did she get so good? The BBC went to meet her to find out.
YOUR COMMENTS:
My greatest achievement is being in a BAFTA winning film. It was nominated for an Oscar too.
Aaron, Belfast, Northern Ireland
I am really great at running and I run for my local club.
Bradley, Leeds, England
My biggest achievement this year would be that I have changed my class' opinion on what feminism is: from women being better than men to equality.
Silvia, Oxford, England
I'm proud of coming 3rd out of 10 in a national cheer leading competition.
Sarah, England
My two best achievements were passing my Grade 1 piano exam and winning 2nd place in a gymnastics competition!
Freya, Surrey, England
I'm very good at Gaelic.
MichÃ©al, Donegal, Ireland
I have achieved a 3A in literacy and am a school councillor.
Emily, Andover, England
I am best at guitar because I am on Grade 4 and have been practicing from the age of 8.
Sassy, Bristol, England
My achievement is when I played hockey and we got 2nd place in our group and 5th overall!
Justina, London, England
I'm really good at playing the steel pans. I recently achieved my bronze award, which is like a GCSE achievement.
Anna, Newcastle, England
My best ever achievement is getting a distinction in my dance exams.
Mary, London, England
I am great at golf. I am even better than my dad!
Arjan, Birmingham, England
I'm extremely proud of swimming for my county.
Dominic, England
This chat is now closed

21 March 2016 Last updated at 15:37 GMT
The pair were working on a new 'augmented-reality' programme called Project Sidekick that's designed to give mission control a better view of what's happening on the station.
Tim explained: "Sidekick creates a virtual-reality world on the International Space Station .... Ground control can come into our virtual world and we can use it for doing tasks together - for example the VR world can point out exactly what switches to flip or which screws to loosen, handles to turn and even guide us to storage locations."
After two hours of working on the project, they found the hidden Space Invaders game and were allowed to take a break and have some fun!
The special effects were added in later by the ESA.
Imagine being so good at something that at the age of 11 you're beating players who are the best in the country.
[NEXT_CONCEPT]
The European Space Agency has shared footage of Tim with his former crew mate Scott Kelly fighting virtual aliens on the ISS, before Kelly returned to Earth earlier this month.