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Fu: Difference between revisions
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* An open hand won by ron without any fu from koutsu or the waiting pattern (i.e. 20 fu) is forced to 30 fu. This is often described as being worth 2 fu for an open pinfu. | * An open hand won by ron without any fu from koutsu or the waiting pattern (i.e. 20 fu) is forced to 30 fu. This is often described as being worth 2 fu for an open pinfu. | ||
== | == Extreme hands == | ||
A hand with 1 han and 110 fu is an exceptionally rare hand. Its requirements are particularly limited, because the hand must be composed of all, not just some, the conditions in the following example. | A hand with 1 han and 110 fu is an exceptionally rare hand. Its requirements are particularly limited, because the hand must be composed of all, not just some, the conditions in the following example. | ||
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South player at South round: | South player at South round: | ||
{{#mjt:456m11z22z}} {{#mjt:0z11s0z}} {{#mjt:0z77z0z}} Ron: {{#mjt:1z}} | :{{#mjt:456m11z22z}} {{#mjt:0z11s0z}} {{#mjt:0z77z0z}} Ron: {{#mjt:1z}} | ||
* 1 han from [[yakuhai]] {{#mjt:7z}} | * 1 han from [[yakuhai]] {{#mjt:7z}} | ||
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Total 102, round up to 110 | Total 102, round up to 110 | ||
This is the greatest fu count for any hand | This is the greatest fu count for any hand worth 1 han, and is only attainable if double winds score 4 fu. If the hand is won by tsumo, then [[sanankou]] and [[mentsumo]] will be scored; if the triplet of [[ton|east]] is closed, then [[sanankou]] will still be scored. Finally, the last group must be a sequence, or [[toitoi]] would be scored. In these cases, this would add han to the hand. | ||
A hand with 2 han and 110 fu is also possible, as in the following for the East player in the East round: | |||
:{{#mjt:234s1z}} {{#mjt:9999'm}} {{#mjt:0330z}} {{#mjt:0z11p0z}} Tsumo: {{#mjt:1z}} | |||
* 2 han from [[sanktansu]] | |||
* base fu: 20 | |||
* tsumo: 2 | |||
* pair wait: 2 | |||
* composition of hand: | |||
** {{#mjt:9m}} open quad: 16 | |||
** {{#mjt:3z}} closed quad: 32 | |||
** {{#mjt:1p}} closed quad: 32 | |||
** {{#mjt:1z}} double wind pair: 4 | |||
Total 108, round up to 110 | |||
This is the greatest fu count for any hand worth 2 han. The third quad means that [[sankantsu]] must be the only yaku, but one must still be open in order to avoid [[sanankou]]. Unlike the 1 han 110 fu example, there is a little bit of leeway: for instance, the hand could be completed on a ron without a double wind pair and still score 110 fu. | |||
With the [[mangan]] limit applied, counting this many fu for anything 3 han or higher is no longer relevant, because any han with 70 fu or more is capped at mangan. If the [[aotenjou]] scoring system is used however, high fu counts remain relevant towards point calculation. | |||
== Open "pinfu" == | == Open "pinfu" == | ||