Black Hole Solitaire

Start the game by placing the black hole card at the center of the layout. Arrange the black hole with a pyramid of face-up cards. Transfer cards to the black hole by choosing a card that is one value higher or one value lower than the current top card of the black hole. Continue this sequence until all cards are moved to the black hole or no more moves are possible. Employ the undo button to correct your last move if needed. Win the game by removing all cards to the black hole. Test yourself by striving to complete the game in as few moves as possible.