Illustration No. 14.
In this illustration the player had three one dots in his hand and drew the fourth in his regular turn to draw. This set counts in scoring as much as it would in his hand but must be exposed in order to draw the "loose tile." Therefore the end tiles are turned down to show that in counting the score that the set is counted as if it were held in the hand.
In this illustration the player has one set of 3 one dots punged and completed, and is now trying to match up the rest of his hand. If another player discards a one dot he cannot touch it and must let it go by. However, if he draws the fourth one dot himself, he may add it on to his set of 3, draw a loose tile and discard as usual. As can be seen from the last three illustrations, the rule in the case of four of a kind is as follows:
In any set which a player may have exposed on the table there must not be more than (1) punged tile.
A player having three of a kind in his hand may pung the fourth when it is discarded or having three of a kind on the table and drawing the fourth may add it to his 3 exposed tiles. The rule, however, bars him from appropriating some one else's discard to make a fourth for an exposed set of three of a kind because in order to appropriate this discard he would have to pung it. This he has not the privilege of doing, because he already must have one "punged" tile in his exposed set or it wouldn't be exposed.