In Istanbul: The Dice Game, players are once again trying to obtain rubies, six for a 2-3 player game or five for a 4-player game, from a central board where the cost to get rubies from each source increases every time someone purchases or takes one. You can buy a ruby with coins (lira); with a set of at least four goods of one color; with a set of four goods, one of each color, and an increasing number of additional goods; or by buying five mosque tiles (four in a four-player game) from the supply. There are four standard goods plus brown goods that function as wilds and can be used to substitute for any color.