It really seems to me like you're scared. Woo wooo, part in hell... No way. It's been told to you before that God is forgiving. Without wanting to fuel a fight, I'm saying this because I don't want you to hurt anymore. I'm a freak, yeah, and I'm crazy for Jesus, but I have good reason - as you too may feel you have good reason for being an athiest. But it looks like you're pushing away the only hope you have. You cannot have a party while you're busy burning for the rest of eternity.
Hell wasn't made for humans, that means it was not made for you. It wasn't made for the nice old lady down the street and it wasn't made for Hitler. Nobody has to go. But Heaven is for you.
If you ever feel like you've been forgotten, overlooked, or hated, you're not. The Christians here on this webside are here because we've got something inside us more powerful than all the mistakes we've made. As for me, I've made far too many, but they've been forgiven, by the forgiving God. You say you'll be dead, pushing daiseys... if you're not just pushing daiseys, then the other option is that you'll be in Hell. That is one gamble not worth taking. Putting your faith in Christ, you will believe that you'll be with Him in heaven. If this is wrong, you have nothing to loose.... if you're wrong, you'll be pushing daiseys. If you're wrong about atheism, then the flip side is ending up in hell.
No Christian is perfect, so none of us are without flaws. Anyone can easily point out my mistakes and shortcommings, but when Jesus said he was willing to overlook that, and forget all the stuff I'd done, I gave up trying to be so tough and self sufficient. Now it doesn't matter to me what the world says I've lost, I've gained so much more since the day I accepted Gods love for me.
There is nothing wrong with everyone being happy forever. That is what people strive for even here on earth. Everyone wants to be happy, loved, and accepted. Being happy forever is something I'm looking forward to. Nobody wants to be unhappy forever. Personaly, I don't know if there will be chess in heaven... never been there, and I'm not too good at the game. But there will be pleanty to keep everyone happy. Get ready for a party in heaven, you're invited.
Revelation 21:4 -5 "He will wipe every tear from their eyes. There will be no more death or mourning or crying or pain, for the old order of things has passed away. He who was seated on the throne said, "I am making everything new!" Then he said, "Write this down, for these words are trustworthy, and true." "