public bool IsMatch(string s) => (s.Length == 1 && BallReader.IsStrike(s[0]));
public BaseFrame GetFrame(string s) => new Open(
BallReader.GetPins(s[0]),
BallReader.GetPins(s[1])
);
public bool IsMatch(string s) => (
s.Length == 2 &&
BallReader.IsValid(s[0]) &&
BallReader.IsValid(s[1])
);
public bool IsMatch(string s) => (s.Length == 2 && BallReader.IsSpare(s[1]));
public BaseFrame GetFrame(string s) => new Spare(BallReader.GetPins(s[0]));
public BaseFrame GetFrame(string s) => new FinalStrike(
BallReader.GetPins(s[1]),
BallReader.GetPins(s[2])
);
