Because I couldn't think of a better one.
Why did you choose the username you have?

It is an abbreviated abbreviation for the gaming term Three Player Free For All (1 player vs 1 player vs 1 player) in which three players are all fighting against eachother for victory. 3PFFA didn't look as good when I was discussing how to abbreviate it with my gaming friends at the time. We came to the conclusion that 3FFA would be best. No sexual connotation to be had.

One of my favorite players(though Capablanca is my top favorite) and I thought Quasimorphy had a good ring to it.

Macer75 was the username of my second RuneScape account, from way back. Since then I've used it as my username on pretty much every site where I create an account, for the sake of not having to memorize a bunch of usernames and which username goes with which site. I didn't use my first RuneScape account's username partly because it contained my name, and partly just because Macer75 sounded better.

my incredible brilliancy and creativeness to add the word chess before my nickname, that's why. I want to change it, but I think it's too late

Dashkee (pronounced dah-SHKEE) is a Navajo word that means "white man." A group of Navajo adopted me as a brother in 1994, soooo....

Just my two first names' initials, a dash and my last surname. Many people do not realize it is two capital "i"s and instead think they are two lower case "L"s.

I choose this username symbolizing that i like get drunk with company...until the total faint , ..and even if i troll or joke - i want the best for the company(drink TO their health) The meaning of my username is that I stay healthy while drinking to people's health because "to drink someone's health" doesn't mean literally drink health, but drink TO someone's health.
Also i choose it knowing that not all people know the real meaning and will get confused, leading to wonder in their heads "why the hell does he drink my health and how does he do it?". Thats why.
So,, Always remember, every time i drink - i drink your health.
I'll start:
Kinnmark
Enough. And yours?