What does this mean?

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Powerdome

Hello what does this result mean?

play-6: 398ms

Is my ping really 398ms?

I tested my connection today and this is the result:

Leto
Can it be the case that you had such huge ping for short period of time?
Powerdome
No. My ping is consistently way over 200ms
Neckrobeard

The test you posted measures the ping and speed you have to the server selected by your speed tester. Actual latency to Chess.com servers can be 300ms, especially seeing that they don't have a point of presence in North Korea.