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: Taca Guanabara                                (ID: 1a1rg) (Sort: Div) (Playoffs: 1)
    Team: Bangu Atletico Clube          (Bangu)         (ID: t16dq)
    Team: Boavista Sport Club           (Boavista)      (ID: t16dr)
    Team: Botafogo de Futebol e Regatas (Botafogo)      (ID: t11hg)
    Team: Clube de Regatas do Flamengo  (Flamengo)      (ID: t11hk)
    Team: Fluminense Football Club      (Fluminense)    (ID: t11hm)
    Team: Madureira Esporte Clube       (Madureira)     (ID: t16dy)
    Team: Club de Regatas Vasco da Gama (Vasco da Gama) (ID: t11i2)
    Team: Volta Redonda Futebol Clube   (Volta Redonda) (ID: t16e4)
  Kind: pro
  Sport: soccer
  Gender: male
  Country: Brazil
  State: Rio de Janeiro
  Level: A
  Season: 2016 (current: False)
  Author: Marcos Vilhena
  Note: 
  LotteryNote: 
LeagueEnd

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

RulesBegin
  PointsForWinInRegulation:  3
  PointsForWinInOvertime:  3
  PointsForWinInShootout:  3
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  0
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0.24
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.52
  WeightType:  Pythagorean
  WeightExponent:  1.4
  WhatDoYouCallATie:  empate
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  Semi-Final
  Promote:  4
  PromotePlus:  0
  PromotePlusPercent:  0
  WhatDoYouCallDemoted:  Serie B
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
3/12/16   4:00 PM   Flamengo        1-0   Madureira       (ID: g1ypx2)
3/13/16   3:30 PM   Boavista        1-0   Volta Redonda   (ID: g1w0s4)
3/13/16   4:00 PM   Vasco da Gama   2-0   Bangu           (ID: g1ypx3)
3/13/16   6:30 PM   Fluminense      1-1   Botafogo        (ID: g1ypx4)
3/19/16   4:00 PM   Boavista        0-1   Vasco da Gama   (ID: g1ypx5)
3/19/16   4:00 PM   Volta Redonda   3-1   Bangu           (ID: g1ypx6)
3/20/16   4:00 PM   Flamengo        0-0   Fluminense      (ID: g1ypx7)
3/20/16   6:30 PM   Botafogo        1-0   Madureira       (ID: g1ypx8)
3/26/16   3:30 PM   Madureira       3-2   Bangu           (ID: g1ypx9)
3/26/16   6:30 PM   Volta Redonda   1-0   Flamengo        (ID: g1ypxa)
3/27/16   4:00 PM   Vasco da Gama   1-0   Botafogo        (ID: g1w0sm)
3/27/16   6:30 PM   Fluminense      3-0   Boavista        (ID: g1ypxb)
3/30/16   3:30 PM   Boavista        1-0   Madureira       (ID: g1w0ru)
3/30/16   7:30 PM   Bangu           0-1   Fluminense      (ID: g1ypxc)
3/30/16   7:30 PM   Botafogo        2-0   Volta Redonda   (ID: g1ypxd)
3/30/16   9:45 PM   Flamengo        1-1   Vasco da Gama   (ID: g1ypxe)
4/2/16    3:30 PM   Bangu           2-1   Boavista        (ID: g1ypxf)
4/2/16    4:00 PM   Botafogo        2-2   Flamengo        (ID: g1ypxg)
4/2/16    6:30 PM   Madureira       1-3   Fluminense      (ID: g1w0rr)
4/3/16    4:00 PM   Vasco da Gama   1-1   Volta Redonda   (ID: g1w0rn)
4/9/16    4:00 PM   Flamengo        3-0   Boavista        (ID: g1w0r5)
4/9/16    6:30 PM   Vasco da Gama   1-0   Madureira       (ID: g1w0r7)
4/10/16   4:00 PM   Volta Redonda   0-2   Fluminense      (ID: g1w0r9)
4/10/16   6:30 PM   Botafogo        1-0   Bangu           (ID: g1ypxh)
4/17/16   4:00 PM   Bangu           0-3   Flamengo        (ID: g1ypxi)
4/17/16   4:00 PM   Boavista        0-1   Botafogo        (ID: g1w0ss)
4/17/16   4:00 PM   Fluminense      0-1   Vasco da Gama   (ID: g1ypxj)
4/17/16   4:00 PM   Madureira       1-1   Volta Redonda   (ID: g1ypxk)
GamesEnd