some vs. any in negative sentences

[Sweetpumpkin]

1. There are not some boys in the room.
2. There are not any boys in the room.

I think the meaning of second sentence is "No boy is in the room". Am I right? But the problem is the first one. I guess its meaning is that "some of all boys in the room are gone. so the other boys are still in the room." I don't know my guess is right or wrong. Please let me know the difference!!!!!

[Mister Micawber]

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The first one is odd and should be avoided for all but the most specific responses. It does not mean what you think; it is a spirited denial of another speaker's suggestion that there are some boys in the room.
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Native English teacher at Mister Micawber's

[Sweetpumpkin]

Thank you for your clear explanation. I got it!