1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
<!DOCTYPE html> <style> table { border-collapse: collapse; } td { border: 5px solid black; width: 100px; height: 100px; } </style> Passes if there is a grid containing 2x2 squares. <table> <tbody> <tr><td></td><td></td></tr> <tr><td></td><td></td></tr> </tbody> </table>