It means there is no winner. A position arose where the person who has the move does not have any legal moves, yet his king is not under attack. Stalemate!

@Upupzealot, the image folder contains six pictures; three are for the title screen (header, chess and notes) and three are for the end-game situations (blackwins, whitewins and drawngame).

Make a higher target. @Game/maniac, when creating a new high score, it does not show up the immediately (that is, you have to loose again before you see it registered on the high scores panel).