Headwear for kings,
Horse heads in chess
and a disappearance after the fact.
Now much easier to guess.
Hope that helps. If you haven't guessed a letter yet, go do. I'm offering a $50 Amazon voucher as prize for one lucky guess (even if you were wrong).
Speaking of help, helping to make people's day is a bit hard this month, since no one seems to want to nominate people for the paying forward awards. As such, I'll be extending the deadline. Please please please go here to nominate someone.