Answer:
They try to beat me, they try in vain. And when I win, I end the pain.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
What flies without wings? What passes all things? What mends all sorrow? What brings the morrow?
As round as an apple. As deep as a cup. All the king's horses can't pull it up.
I can be used to type and point you see. But don't forget, you can count on me. What am I?
What sphinxes employ and players enjoy.