Mahjong Compendium

Proto-mahjong › Chinese classical › Shanghai / Hong Kong new style › Hong Kong old style › Guangdong style › Guangdong MCR / GMCR

Guangdong MCR / GMCR

2020s

Cross-comparison

corroborated — two or more independent sources agree on the facts that define this variant

SourceTilesHandFlowersScoringPayout
[1]———built only from rules found in historic Guangdong Style rulesets, and teachable as a three-step progression through Clear Chapter and New Chapter HKOS—
  • [2] the same timeline ends: 2020s, the synthetic competitive variant Guangdong Mahjong Competition Rules (GMCR) is made. This corroborates the chart's 2020s date
  • [1] states GMCR was created to promote competitive Guangdong Style, with three goals: true to the game yet simple, easy to learn, and competitive — the last achieved by removing pure-luck wins such as Blessing of Heaven and the self-drawn win. Gives an explicit descent chain: GMCR evolved from Guangdong Style, which evolved from HKOS, which was adopted as a backlash to HKNS, which evolved from Chinese Classical
  • [3] a tournament codification of Guangdong style, showing the parent variant in current competitive use

Reading it

The 2020s date is confirmed by two wiki pages, and the node is now substantive rather than a bare label: GMCR was assembled to make Guangdong Style competitive, drawing only on rules already present in historic Guangdong rulesets and stripping out pure-luck wins like Blessing of Heaven and the self-drawn win. Its own page also states the descent chain in words — GMCR from Guangdong Style, Guangdong from HKOS, HKOS adopted as a backlash to Hong Kong New Style, and that from Chinese Classical — which matches the chart's shape through this whole branch, including the intermediate new-style node.

Sources

  1. Mahjong Wiki. "Guangdong MCR Overview." mahjong.wikidot.com. canonical checked 2026-09-19

    Cited as the source for individual nodes in the chart's node table. Carries no bibliography or per-claim citations of its own; see the appendix on tracing the wiki.

    http://mahjong.wikidot.com/rules:gmcr-overview

    Also cited on: Shanghai / Hong Kong new style, MCR / Chinese official · bibliography #43

  2. Mahjong Wiki. "Guangdong Style Overview." mahjong.wikidot.com. cross-check checked 2026-09-18

    Cited as the source for individual nodes in the chart's node table. Carries no bibliography or per-claim citations of its own; see the appendix on tracing the wiki.

    http://mahjong.wikidot.com/rules:guangdong-style-overview

    Also cited on: Guangdong style · bibliography #42

  3. World Mahjong Tour. Guangdong Mahjong tournament rules. cross-check checked 2026-09-19

    A tournament codification of Guangdong style, showing the variant in current competitive use.

    https://worldmahjongtour.live/tournament-rules-guangdong-mahjong/

    Only cited here · bibliography #74

  4. Mahjong Wiki. "Hong Kong Old Style Overview." supporting

    The 1950s simplification, removal of fu, the 1970s 3-3 system, and the late-1980s split into Taiwanese and Guangdong styles.

    http://mahjong.wikidot.com/rules:hong-kong-old-style-overview

    Also cited on: Hong Kong old style, Modern HKOS, Guangdong style, Taiwanese style · bibliography #8

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