All Fives, also called Muggins, adds scoring during the round. Every time your play leaves the open ends totalling a multiple of five, you score that total on the spot. It rewards arithmetic as much as tile management, and it is the variant most domino apps implement incorrectly.
A standard double-six set has 28 tiles: every pairing of two numbers from blank to six, with no duplicates. A tile showing the same number twice, like 5|5, is a double.
The tiles nobody was dealt sit face down in a pile called the boneyard. In a four-player game dealt five tiles each, twenty tiles go out and eight stay in the boneyard.
The first double played becomes the spinner. It is laid crosswise, and once both ends of the main line have grown, the chain can also branch off its two sides - so the layout can have up to four open ends instead of two.
After you place a tile, add up the numbers showing at every live open end. If the total divides by five, you score it. A board showing 5 and 5 scores 10. A board showing 6, 4 and 5 scores 15. A total of 13 scores nothing.
A double sitting at an open end counts both of its halves. A 4|4 at the end of an arm contributes 8, not 4. This is the single rule most often implemented wrong.
Once the spinner has arms growing from all four sides, all four ends count toward the total. That is what makes big scores possible, and why controlling the spinner matters so much in All Fives.
Going out scores the pips left in the other players' hands, rounded to the nearest five, exactly as in Draw. Those points are added to whatever you scored during play.
