Pyramid (solitaire)

"Pyramid" is a card game where players make pairs of cards, creating a sum of 13 or 14. In "Close Mode", cards are places faced down, while in "Open mode", cards are places faced up. The first row has 1 card, second row has 2 cards and so on, till the seventh row with 7 cards. Note: Even in "Close mode", the seventh row is places faced up. Leftover cards are stacked on the table as what we call t…