What is the fewest number of White chess pieces from the start of a game, that can be placed on a standard chessboard in order to make it impossible to place a Black piece on the board that is not under attack?

Remember,
The final answer must be a subset of the original starting pieces, i.e. only 1 queen, 2 rooks, etc.
Bishops should be on different colour squares.
It is not necessary to attack squares with white pieces on them, as the black piece cannot share a square.

(In reply to The best I could come up with by Sing4TheDay)

I should have said that 8 pieces is the best I could come up with.  I've found MANY different ways to do it with 8 pieces (not necessarily the one setup I diagramed).  I'm still trying to see if I can do it with less.

Posted by Sing4TheDay on 2004-09-01 09:15:58