Pyramid Solitaire equipped with score ranking function. Clear the 2 cards that sum to 13 ([K] erasable alone). Can put the card freely in "free area". Draw a card If you click on the deck, you have "discard". Can select the "card on the discard", "card free area", "card under the pyramid". Playable on PC, Smartphone etc.
Use free area is -100pts. Surrender is -50pts.
Clear is +10000pts.
All delete is +5000pts.