public static int Sixes(this YatzyDice dice) { return(dice.FilteredSumBy(6)); }
public static int Fives(this YatzyDice dice) { return(dice.FilteredSumBy(5)); }
public static int Fours(this YatzyDice dice) { return(dice.FilteredSumBy(4)); }
public static int Threes(this YatzyDice dice) { return(dice.FilteredSumBy(3)); }
public static int Twos(this YatzyDice dice) { return(dice.FilteredSumBy(2)); }
public static int Ones(this YatzyDice dice) { return(dice.FilteredSumBy(1)); }