In life as in chess. There's no use fretting how you got into it. If not even God can restore a virgin, then surely you cannot undo the mess you are in. You're in it, now play it. Fretting is of use only if it helps you avoid the pickle next time.
And that reminds me of an online chess player's moniker: Next Time. Even better: Weaker than F7.
After a hard day of tournament play the chess player came home to his wife. The love light shone in her eyes. "Not tonight, honey, I'm weaker that F7."