This is always an easy win. The King and Queen work together to force the lone King to the side of the board, then give checkmate. In the diagrammed position, White on the move can checkmate with Qa8+ or Qg8+. If Black is on the move, White checkmates with 1...Kc8 2.Qa8+ or 1...Ke8 2.Qg8+.
Elementary endgames
By Mark Weeks, About.com
Index: Elementary endgames
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