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 Reply to the posted solution by Sing4TheDay)

Good call, you are right.

but as you say there are many solutions with 8 pieces. i've found 20 or so, and this is the one i chose to post, my mistake.

The 7 piece solution eludes me too.

Juggler

Posted by Juggler on 2004-09-23 01:43:22