You can add leagues, big or small, to Sports Club Stats.
   It's free.
   It's easy.
   Just email import@sportsclubstats.com the:
      structure
      schedule
      and rules
   In a few minutes you'll get back a link to the league.
   Play around, have fun, you won't break anything.
   I look forward to seeing what you create.

Info about the various settings:
   https://docs.google.com/document/d/1-UneDNk6tkOrc_B-WBnGnc5KGiy2kttXC2fW8dR7QzM/edit?hl=en

For example, here is what created this league:

LeagueBegin
  League: St Albans Darts Summer Division 1 (StASummer2019Div1) (ID: 1a1tw) (Sort: Div) (Playoffs: 1)
    Team: Billet                                                (ID: t1h03)
    Team: Black Boy                                             (ID: t1s5x)
    Team: Exiles                                                (ID: t1h04)
    Team: Garibaldi                                             (ID: t1h0m)
    Team: New Greens                                            (ID: t1111)
    Team: Rats Castle                                           (ID: t1h05)
    Team: Sandridge Rovers FC               (Sandridge Rover)   (ID: t1m8h)
  Kind: pro
  Sport: darts
  Gender: male
  Country: England
  State: 
  Level: B
  Season: 20182019 (current: True)
  Author: Tom Higham
  Note: 
  LotteryNote: 
LeagueEnd

SortBegin
Div: Average Points, Average GoalsDelta, Average GoalsFor, Average
Points
HeadToHead, DrawLots
SortEnd

RulesBegin
  PointsForWinInRegulation:  2
  PointsForWinInOvertime:  2
  PointsForWinInShootout:  2
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  0
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0.5
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.6
  WeightType:  Pythagenpat
  WeightExponent:  1.7
  WhatDoYouCallATie:  draw
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  Champions
  Promote:  1
  PromotePlus:  0
  PromotePlusPercent:  0
  WhatDoYouCallDemoted:  Relegation
  Demote:  2
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
6/6/19    Billet            5-3   Garibaldi         (ID: g1z7r0)
6/6/19    Black Boy         2-6   Rats Castle       (ID: g1xsas)
6/6/19    New Greens        6-2   Sandridge Rover   (ID: g1xs9c)
6/13/19   Exiles            3-5   Billet            (ID: g1xs9a)
6/13/19   Garibaldi         2-6   Black Boy         (ID: g1xsap)
6/13/19   Sandridge Rover   3-5   Rats Castle       (ID: g1xsa7)
6/20/19   Black Boy         4-4   Sandridge Rover   (ID: g1xsb3)
6/20/19   New Greens        3-5   Exiles            (ID: g1xs8s)
6/20/19   Rats Castle       6-2   Garibaldi         (ID: g1xs9r)
6/27/19   Billet            6-2   New Greens        (ID: g1xs9s)
6/27/19   Exiles            5-3   Black Boy         (ID: g1xs8y)
6/27/19   Garibaldi         3-5   Sandridge Rover   (ID: g1xsa4)
7/4/19    New Greens        4-4   Garibaldi         (ID: g1xsai)
7/4/19    Rats Castle       3-5   Exiles            (ID: g1xsb7)
7/4/19    Sandridge Rover   1-7   Billet            (ID: g1xsah)
7/11/19   Billet                  Rats Castle       (ID: g1xs8a)
7/11/19   Black Boy               New Greens        (ID: g1xs9x)
7/11/19   Exiles                  Sandridge Rover   (ID: g1xs8b)
7/18/19   Black Boy               Billet            (ID: g1xs8f)
7/18/19   Garibaldi               Exiles            (ID: g1xs9g)
7/18/19   Rats Castle             New Greens        (ID: g1xsam)
7/25/19   Garibaldi               Billet            (ID: g1xs9m)
7/25/19   Rats Castle             Black Boy         (ID: g1xs95)
7/25/19   Sandridge Rover         New Greens        (ID: g1xsaz)
8/1/19    Billet                  Exiles            (ID: g1xsay)
8/1/19    Black Boy               Garibaldi         (ID: g1xs90)
8/1/19    Rats Castle             Sandridge Rover   (ID: g1xs8k)
8/8/19    Exiles                  New Greens        (ID: g1xsad)
8/8/19    Garibaldi               Rats Castle       (ID: g1xsbd)
8/8/19    Sandridge Rover         Black Boy         (ID: g1xs9h)
8/15/19   Black Boy               Exiles            (ID: g1xsag)
8/15/19   New Greens              Billet            (ID: g1xsbf)
8/15/19   Sandridge Rover         Garibaldi         (ID: g1xs8g)
8/22/19   Billet                  Sandridge Rover   (ID: g1xs8x)
8/22/19   Exiles                  Rats Castle       (ID: g1xs9k)
8/22/19   Garibaldi               New Greens        (ID: g1xs8z)
8/29/19   New Greens              Black Boy         (ID: g1xs8d)
8/29/19   Rats Castle             Billet            (ID: g1xs9w)
8/29/19   Sandridge Rover         Exiles            (ID: g1xs9y)
9/5/19    Billet                  Black Boy         (ID: g1xsa2)
9/5/19    Exiles                  Garibaldi         (ID: g1xsb2)
9/5/19    New Greens              Rats Castle       (ID: g1xs91)
GamesEnd