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

Tic-Tac-Logic tips


  • Start by eliminating situations where more than two consecutive X's or O's can occur.
  • Always double check before placing X or O.
  • Never guess! Only make moves based on logical deductions.

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

When solving on paper

  • Use a soft erasable pencil and a high quality eraser.

When playing on a computer

  • Use Preferences options in toolbar for a better personal playing experience.
  • When needed, temporarily mark squares with X or O using the toolbar's Mark squares option.
  • Use the horizontal or vertical ruler to help focus on the row or column being solved.
  • You can lock a ruler to avoid accidental movement or to create a second ruler when comparing two rows or columns.