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Fu: Difference between revisions
Add a section with shortcuts for quickly counting fu
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This is an open "yakuless" hand. When closed, it resembles that of pinfu. Counting the fu from this hand, it produces 0 fu other than the base 20 fu for every hand. A hand like this can still gain yaku worth 1-han from either [[chankan]], [[haitei]], or [[houtei]]. As far as hands go, this pattern generates an exception to the rule behind counting fu; and as a special case, it is granted 2 fu in order to be rounded up to 30 fu. | This is an open "yakuless" hand. When closed, it resembles that of pinfu. Counting the fu from this hand, it produces 0 fu other than the base 20 fu for every hand. A hand like this can still gain yaku worth 1-han from either [[chankan]], [[haitei]], or [[houtei]]. As far as hands go, this pattern generates an exception to the rule behind counting fu; and as a special case, it is granted 2 fu in order to be rounded up to 30 fu. | ||
== Shortcuts for Counting == | |||
To be able to announce hand scores quickly, it helps to know some shortcuts for counting fu. These shortcuts take advantage of the fact that fu is always rounded up to the next 10. | |||
* [[chiitoitsu]]: fixed at 25 fu | |||
* [[toitoi]]: almost always 40 minipoints (see below) | |||
* [[pinfu]]: ron is always 30 fu, tsumo is always 20 fu | |||
* Closed hand without [[pinfu]]: ron is almost always 40 fu, tsumo is almost always 30 fu | |||
* Open hand: almost always 30 fu | |||
These shortcuts don't work for hands that have quads since those are worth enough fu by themselves to have a significant influence on the total. In that case, it's better to simply count the fu properly. | |||
"Almost always" means that there are a few exceptions which may raise the fu past the shortcut value. In particular, look for these elements in the hand's composition: | |||
* at least one concealed set of terminal/honor tiles | |||
* at least two open sets of terminal/honor tiles | |||
* one open set of terminal/honor tiles and one concealed set of simples | |||
* at least two concealed sets of simples | |||
All of the above are worth 8 fu and thus may raise the total fu count by 10 when combined with the 2 fu for tsumo and for having difficult wait. If none of these elements exist in a non-[[toitoi]] hand without quads, it is ''always'' 40 fu when closed and ''always 30'' fu when open. | |||
Counting fu for [[toitoi]] is a bit trickier but only ''open'' [[toitoi]] hands need to be considered: if you win a closed [[toitoi]] hand by tsumo, it's a yakuman ([[suuankou]]) and if you win a closed [[toitoi]] hand by ron, it's a mangan or higher ([[toitoi]] + [[sanankou]]). Also, a [[toitoi]] hand with only terminals/honors is [[honroutou]], also worth at least a mangan. Thus, an open [[toitoi]] hand with no quads for which counting fu actually matters will almost always score 40 fu. | |||
== External links == | == External links == | ||