This undated game combines die rolling with memory. Each player takes a bingo-like card with four numbered columns and seven rows of circles and covers each circle with a plastic disk (plack). On each card, 12 circles are blank, and the remainder have instructions such as "Pick-A-Plack"; "Others cover one blank", "Have another turn" or "Cover two blanks".
Players take turns rolling a die. On a 1-4, they may remove one plack from that column; on a 5, they must replace a plack on an open location of their choice; and on a 6, they may remove a plack from any one location. When removing a plack, they obey whatever instructions are underneath. The player who first removes all the placks on his card wins.
Despite the random element of die rolling, the key to victory is using required replacement of placks to re-cover useful spots, and remembering which of these will be most useful in each future situation.