DiceGrouptype

How many dice: at least 1, and no more than MAX_DICE over the whole roll.

The kind of die: 2 to 1000 sides, or "F" for a Fate die.

Which dice count towards the total.

How many dice highest or lowest keep. Left out when it is one.

A die showing its highest face throws another, which may do the same. Left out when the dice do not explode.

A die showing this face or lower is thrown again, once, and the new face stands: ro< in notation. Left out when nothing is rerolled once.

A die showing this face or lower is thrown again until it shows more, up to MAX_REROLLS times: r< in notation. Left out when nothing is rerolled until clear.

A die meeting this is thrown again, once: ro>=5, ro=3. For the comparisons reroll cannot say; left out otherwise.

A die meeting this is thrown again until it does not, up to MAX_REROLLS times: r=3, r>=5. For the comparisons rerollUntil cannot say; left out otherwise.

With explode: the faces that explode, when they are not just the highest. !>=5 in notation. Left out when only the highest face explodes.

With explode: how the extra dice are added up. Left out for ordinary explosions.

The least a die counts for: a face below it counts as it. min2 in notation.

The most a die counts for: a face above it counts as it. max5 in notation.

The dice are counted, not added: each die meeting this is one success, and the total is how many. >=8 in notation.

With success: each die meeting this takes one success away. f=1 in notation.

Dice meeting this are marked as critical successes. Only a mark: the total is the same. cs>=19 in notation.

Dice meeting this are marked as critical failures. Only a mark. cf<=2 in notation.

The order the dice are shown in: sa ascending, sd descending. The order thrown is kept in the roll.

The dice all show different faces: each is thrown from the faces not yet showing, which comes to the same as rerolling any duplicate until there is none. u in notation.

A custom die: its faces, in order, and sides is how many there are. A face written twice comes up twice as often. A roll records a custom face by its place, from 1. Left out of a numbered die and a Fate die.

A loaded die: how heavily each face is weighted, from the lowest face up, where a fair die has every face at 1. [1, 1, 1, 1, 1, 3] is a d6 that shows its 6 three times in eight. Left out of a fair die, and never present by accident: isFair is false for any roll that has it.