Sometimes you don't have any other choice but to try your chance.
There is no chance, if you don't take one!
You missed your chance, you failed this test.
He still has a chance to win!
You are lucky, it's one chance in a million!
It is my pleasure to take part in different competitions!
My brother will win this competition, I'm sure!
Oh, no! Our team is loosing the competition!
That guy is in luck, he always wins the lottery!
I guess, it's not my day, I'm just out of luck!