IQ XOXO

Can you fill the grid with 10 colorful, double-sided pieces, leaving the X's and O's in sequence? Choose a challenge and place the puzzle pieces on the board as indicated. Then try and fit the remaining pieces onto the board, remembering that there should always be an O next to an X in both the horizontal and vertical directions. With only one solution to each puzzle and 120 challenges, you'll be puzzling for hours!