Don't know if you guys play it a lot, but since I do... If you play Klondike there is a small bug that lets you select a blind card. Let's assume a red 6 is open and on another pile you have a black 3, a red 4 and at least a blind card. If this blind card is a black 5, you can select it (spacebar) and put it on the red 6. The blind card is 'unblinded'. Now strange things happen when you undo that move. All moved cards are put back on the
pile, but now all blinded... At this point you may as well quit the game ;-)

Bye!

NTOO

If you play Klondike so often, can you tell me what the grey triangles at the top of the columns and below the card stacks mean?
Roger

It means that the pile can be scrolled off the screen.