You need to put numbered cards into stacks of matching colour in increasing order. You can move 2 or 3 cards simultaneously by marking out the top 2 or 3 cards of the column of random cards and clicking the colour of the stack below. The black stack is auxiliary. Until card number 12, when you collect 4 numbers of the required colour into any one of the stacks, the 4 numbers disappear. When you reach 13 in all colours, you will need to fill all 4 stacks in order to win the game.
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