{
  "schemaVersion": 1,
  "reviewedAt": "2026-08-25",
  "sources": [
    {"id":"whw-practice-table","publisher":"Wong Hong Wei","title":"Singapore Mahjong practice-table specification","sourceType":"software-implementation","url":"https://wonghongwei.com/singapore-mahjong-guide/#sec-21-specification","accessedAt":"2026-08-25","coverage":"The exact rules implemented by the current game and companion.","limitation":"A named practice-table profile, not a universal Singapore rulebook."},
    {"id":"singaporemahjong-reference","publisher":"SingaporeMahjong.com","title":"Singapore Mahjong rules","sourceType":"established-reference","url":"https://singaporemahjong.com/rules/","accessedAt":"2026-08-25","coverage":"Long-standing public descriptions of Singapore Mahjong play and scoring.","limitation":"Describes its own reference rules and does not establish one nationwide code."},
    {"id":"spgg-competition","publisher":"Singapore Polytechnic Graduates Guild","title":"Mahjong competition rules","sourceType":"competition-rules","url":"https://www.spgg.org.sg/web/content/114907/","accessedAt":"2026-08-25","coverage":"A published competition ruleset useful for identifying institutional variants.","limitation":"Competition scope; it must not be silently substituted for a household profile."},
    {"id":"tabletopia-sg-scoring","publisher":"Tabletopia","title":"Singaporean Mahjong scoring rules","sourceType":"software-implementation","url":"https://c.tabletopia.com/games/singapore-mahjong/rules/singaporean-mahjong-scoring-rules/en","accessedAt":"2026-08-25","coverage":"A public implementation-oriented scoring comparison.","limitation":"Its choices describe that implementation and are not treated as universal."}
  ]
}