Participant 1
Initial description: input colored squares should remain and all remaining black/blank squares should be colored dark blue.
Final description: All black/blank spaces from input should be filled with dark blue if at least one dark blue square borders that group of spaces with a full side edge.
Participant 2
Initial description: Copy the input and then color all black spaces that aren't locked by previously colored spaces blue.
Final description: Copy the input and then color all black spaces that aren't locked by previously colored spaces blue.
Participant 3
Initial description: turn large numbers of black squares into blue, leaving them black if they are bunched three together or less
Final description: I thought I had to change large groupings of black squares into blue. I thought I left black squares black if they were single or double black squares.