Flash player support

Due to deprecation of Flash at the end of 2020 we are converting all our games to HTML5 which is supported by all popular browsers. We are planning to complete this process before the end of 2019. In the meantime, in case you have problems enabling Flash on your browser please see these instructions

Block-a-Pix tips


  • Start with the very small clues of 1 and 2.
  • Search for squares which can only belong to one clue and form a temporary partial block. This will help finding other blocks in the area.
  • Sometimes large blocks are easier to solve than what it seems. Don't be afraid to try even in the early stages of a puzzle.
  • Remember: blocks with primary number clues (3, 5, 7, 11, 13…) are always 1-square wide.
  • Scan all clues one by one. There is always another step somewhere!
  • Never guess! Fill blocks with the right color only after you know to which clue they belong.

Note: There is only one unique solution for each puzzle.

When solving on paper

  • Use a soft erasable pencil and a high quality eraser.
  • Mark the outline of the block first and then fill it with color.
  • Clues in light-gray mean that the block is white. You can mark the squares of white blocks with X's or just leave them empty.

When playing on a computer

  • Use Preferences options in toolbar for a better personal playing experience.
  • Any block can be deleted by double-clicking the mouse.
  • Blocks showing a surrounding line mean they are not yet completed.