Who is the best all-time chess player?
According to the international chess federation (FIDE) and its adopted ELO rating, Magnus Carlsen is the best all-time chess player with an ELO best rating of 2882. Please note, ELO rating was adopted by FIDE in 1970 so there could have been players before that date with higher ELO rating. Still, it is safe to say Magnus Carlsen is one of the all-time best players ever.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
----------------

----------------
Answer the following query.
Who is the best all-time chess player?

user
According to the international chess federation (FIDE) and its adopted ELO rating, Magnus Carlsen is the best all-time chess player with an ELO best rating of 2882. Please note, ELO rating was adopted by FIDE in 1970 so there could have been players before that date with higher ELO rating. Still, it is safe to say Magnus Carlsen is one of the all-time best players ever.
assistant