Klondike Solitaire is a popular solitaire card game, and you can play it for free online in your web browser. No download or registration is required. Rules of Klondike Solitaire To move a card, left-click on it or tap and drag it. Drag a card or just double-tap it to move it to the foundation pile. To undo the previous action, tap Undo. To receive hints, tap the menu and select the Hint...