Place cards from the moving line on the grid. The cards you place have to be 1 higher or 1 lower then a neighboring card. Complete the grid to advance to the next level. Pick cards from the supply line and place them in the grid. Click on the beaker to back up the line and place joker cards anywhere you need to put a card you don't have in the line. You get a faster line and more cards as you go through the levels. How long can you last playing Chemistry Solitaire?