Object of the game: To have all tiles turned faceup in 7 or less vertical rows.
Keeping the tiles facedown, place them in 7 rows. The first row contains 7 tiles; the second row contains 6; and so on, each row containing one less tile and the last row containing only one tile. Then, turn the far left tile of each horizontal row faceup.
Choose the way you will turn tiles over from facedown to faceup and use that method consistently throughout the game.
Move the faceup tiles from one row to another, placing matching end to matching end, without turning the tile around.
Any time you have a facedown tile at the end of a row (this happens after you have moved a faceup tile in order to make a play), you should turn this tile faceup.
In the course of the game you may end up with less than 7 vertical rows. If this occurs, it is permissible to move a tile or a full or partial horizontal row of matching tiles, in order to form another vertical row. At no point in the game, however, should there be more than 7 vertical rows.
Reprinted with permission of Sterling Publishing Co., Inc., NY, NY from GREAT BOOK OF DOMINO GAMES by Jennifer Kelley, ©1999 by Jennifer Kelley. (The Sterling book is available as PUREMCO'S GREAT BOOK OF DOMINO GAMES)