Domino Pyramid is the classic version of Pyramid Solitaire which is played with dominoes in stead of cards. Dominoes are cleared in pairs if its pip count matches the total of 12. Initially all dominoes from a double-six dominoes set are arranged in a pyramid shape. Dominoes in top and bottom rows are turned face-up and rest of the rows are face-down. Dominoes can be matched from both top and bottom rows. All face-down dominoes are turned face-up as soon as either top or bottom side of it is exposed with no domino is touching that side.
This game can be played in two modes: Classic, Relaxed

In relaxed mode player gets two additional joker tiles which can be used with any other tile to match and remove.