Space mahjong: Difference between revisions

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'''Space mahjong''' is a modified set of rules to [[mahjong]] originally conceived by the R18 game Itadaki jan-gari-anR. Here, the limitations on terminal tiles and honor tile are removed.  Normally, the 1-9 scale ends with 1 and 9 as terminals. In this set of rules, the number sequence is given the wrap around effect when it comes to the formation of tile groupings. 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]] 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.


== Tile groupings ==
== Tile groupings ==
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=== Numbered tiles ===
=== Numbered tiles ===
In regular mahjong, 1 and 9 are the ends of a sequence. In space mahjong, 9 may connect to 1 like any other tile. Therefore, terminals are no worse for [[tile efficiency]] than middle tiles.


=== Honor tiles ===
=== Honor tiles ===
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=== Tanyao ===
=== Tanyao ===
There's no more special combination generated by this ruleset. Everything works as still.
Tanyao is scored as normal.


=== Chiitoitsu ===
=== Chiitoitsu ===
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=== Chanta / Junchan ===
=== Chanta / Junchan ===
Aside from honor-tile shuntsus, there're two more available combinations of numbered-tile shuntsus: 891 and 912. This makes chanta and junchan become much easier than in regular rules.
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 ===
The restriction of Toitoi / Chiitoi-based hand no longer applies, as honors can be used for shuntsus.
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 no longer unavailable since honor tiles can be grouped as shuntsus.
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}}


Though the value of such opened hand is usually reduced for balancing purpose (e.g. 2 ~ 3 hans), since it makes kokushi musou significantly easier than menzen one.
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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