Dominoes 49 glyphs, the same combinations vertically for another 49, and also a horizontal and a vertical "back" for a total of 100 glyphs. In this arrangement, both orientations are present: horizontally both tiles [1|6] and [6|1] exist, while a regular game set only has one such tile. The Unicode range for dominoes is U+1F030–U+1F09F. The naming pattern in Unicode is, by example, . Few fonts are known to support these glyphs. While the complete domino set has only 28 tiles, for printing layout reasons, the Unicode set needs both horizontal and vertical forms for each tile, plus the 01-03 (plain)
42 (dominoes) in some variants, three) marks are bid and the bidder must have four doubles. Jump bids are allowed for Splash and Plunge. All tricks must be won for a successful plunge bid. If the opponents win even one trick the plunge bid fails and the opponents get the marks. Another less common rule is to allow a player to bid Sevens. Instead of the highest domino winning each trick, the domino whose sum is closest to seven wins. Dominoes are classified as "sevens" (the 4-3, 5-2, and 6-1), "one away" (dominoes adding to six or eight), "two away" (adding to