You should run the scenario a little, then pause it. Then, upload it again, making sure you uncheck 'Keep existing screenshot', drag the picture or resize as you want before you actually upload it.

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).