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'''Space mahjong''' is a modified set of rules to [[mahjong]] originally conceived by the R18 game Itadaki jan-gari-anR. In space mahjong, terminals may "wrap around", so sequences of 912 and 891 become possible. In addition, honor tiles may be used in sequences. Another big difference in this ruleset is that you can call Chii from any player just like if you were calling Pon. | |||
'''Space mahjong''' is a modified set of rules to mahjong. | |||
== Tile groupings == | == Tile groupings == | ||
Due to the wrap around effect, | Due to the wrap around effect, terminals and honors have much better [[tile efficiency]] than normal. | ||
=== Numbered tiles === | === Numbered tiles === | ||
In regular mahjong, 1 and 9 cannot be part of the same sequence. In space mahjong, 9 may connect to 1 like any other number tile. Therefore, the terminals are no worse for tile efficiency than the middle tiles. | |||
=== Honor tiles === | === Honor tiles === | ||
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* {{#mjt:1234z}}, tanki waiting for {{#mjt:1234z}}. | * {{#mjt:1234z}}, tanki waiting for {{#mjt:1234z}}. | ||
== | == Yaku == | ||
=== Tanyao === | === Tanyao === | ||
Tanyao is scored as normal. (Because terminals/honors are easier to use, though, it is less important than usual.) | |||
=== Chiitoitsu === | |||
This yaku is not allowed in this ruleset. | |||
=== Chanta / Junchan === | === Chanta / Junchan === | ||
Aside from honor-tile shuntsus, there | Aside from honor-tile shuntsus, there are two more available combinations of numbered-tile shuntsus: 891 and 912. This makes chanta and junchan become much easier than in regular rules. | ||
:{{#mjt:912m891p11s56z}} {{#mjt:1'24z}} Agari: {{#mjt:7z}} | :{{#mjt:912m891p11s56z}} {{#mjt:1'24z}} Agari: {{#mjt:7z}} | ||
=== Honroutou === | === Honroutou === | ||
Honors may be used in sequences, so it is possible to gain honroutou without toitoi or chiitoi. | |||
The following hand shows how it is possible with Honroutou-nomi. | The following hand shows how it is possible with Honroutou-nomi. | ||
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=== Kokushi Musou === | === Kokushi Musou === | ||
Opened kokushi is | Opened kokushi is now possible, as honor tiles can be grouped as shuntsus. | ||
:{{#mjt:19m19p119s}} {{#mjt:2'34z}} {{#mjt:6'57z}} Agari: {{#mjt:1z}} | :{{#mjt:19m19p119s}} {{#mjt:2'34z}} {{#mjt:6'57z}} Agari: {{#mjt:1z}} | ||
However, open kokushi is greatly reduced in value (e.g. 2 ~ 3 han) for balancing purposes. | |||
=== Junsei Chuuren Poutou === | === Junsei Chuuren Poutou === |
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