Tile Rummy

A kind of manipulation rummy is played with a set of numbered and coloured tiles, as used in Turkey for the game Okey, and possibly also in other parts of
the Middle East. Possibly there are other traditional games played with these tiles, and I hope that people will let me know about these, and where they are
played. In Israel, Western Europe and America the equipment for this game is sold under the trade name Rummikub®. 

Tile Rummy is played with a special set of numbered tiles. The numbers run from 1 to 13 and there are four colours: black, red, blue and orange. There are
two tiles of each number and colour plus two joker tiles, making 106 tiles in all. 

There are from two to four players, and the game is played clockwise. At the start each player takes 14 tiles, which are kept on a rack so that the other
players cannot see them. The remaining tiles stay face-down on the table to form the pool. 

The object is to be the first to get rid of all of your tiles by melding them in combinations on the table. The possible combinations are: 

     groups, consisting of three or four tiles of the same number and different colours 
     runs, consisting of three or more consecutive numbers of the same colour. 

Jokers can be used as substitutes for any numbered tile to make up a valid combination. 

A turn consists of either drawing one tile from the pool or melding one or more tiles from hand by placing them on the table. 

The first meld made by each player must consist of one or more combinations formed entirely from that player's hand, where the total numbers of the tiles used
adding up to 30 or more. If a joker is used, it counts as the number of the tile it represents. 

Having placed an initial meld, in the same or subsequent turns a player can meld by rearranging the tiles on the table to form new combinations provided that
by the end of the turn at least one tile has been added from hand, and all the combinations on the table are valid. 

A combination which contains a joker can have further tiles added to it, but nothing can be taken from it, nor can it be rearranged into other melds while there
is a joker in it. However, a player who has in hand the tile which the joker represents can substitute the real tile for the joker and then use the joker in some
other combination on the table. 

Because of the complexity of the possible rearrangements, some players set a time limit for a turn, for example one minute. At the end of your turn you say
"pass", and the next person can play. 

The first player who manages to play all their tiles wins. The other players add up the numbers on the tiles remaining in their racks, counting jokers as 30. They
each score minus the total of their remaining tiles, and the winner scores plus the total of all the losers' tiles.