Knight, Bishop, Rook and King vs Rook and King

No pawns on the board.

Is this a win the majority piece holder, or a draw, with perfect play?

It's a win.

http://www.shredderchess.com/online-chess/online-databases/endgame-database.html

Here's a link to an endgame tablebase, it will tell you all you need to know.

Thanks, looks like a forced win in 15 moves or so, or a draw, depending on the next moves.

Originally posted by Duncan Clarke
Thanks, looks like a forced win in 15 moves or so, or a draw, depending on the next moves.

Umm, you are not allowed to consult an end game database during a live game. That would be cheating and is against site rules, just in case there is any confusion..