Draw one vs draw three: the main difficulty lever.; Limited redeals: the stock may be recycled once, three times, or not at all.; Vegas scoring: "buy" the deck and earn per card on the foundations, tracked cumulatively across deals.
Why people argue about this
People often assume that in Solitaire (Klondike), you must always draw one card from the stock pile each time it's empty, but actually, they forget about the option of drawing three cards per turn when limited redeals are allowed—this is where the confusion arises because it can significantly impact strategy and how quickly a game might be completed.
