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(mention closed tile groups) |
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This distinction is important for two reasons: | This distinction is important for two reasons: | ||
* Two [[yaku]] (and only two yaku) care about closed tile groups: [[sanankou]] and [[suuankou]]. Every other yaku only checks if the hand is closed. For example, it is possible to score [[iipeikou]] with a hand won by ron, even if the iipeikou was completed by the ronned tile. | * Closed triplets and closed kans are worth more fu than their open counterparts. Sequences are unaffected. | ||
* | * Two [[yaku]] (and only these two yaku) care about closed tile groups: [[sanankou]] and [[suuankou]], which both require closed triplets. | ||
** Every other yaku only checks if the hand is closed. For example, it is possible to score [[iipeikou]] with a hand won by ron, even if the iipeikou pattern was completed by the ronned tile. | |||
Example 1: | |||
* {{#mjt: 55666p11188s666z}} Agari: {{#mjt: 5p}} or {{#mjt: 8s}}. | |||
** On tsumo, the hand scores suuankou, since it has 4 closed triplets (6-pin, 1-sou, Hatsu, the triplet completed by tsumo). | |||
** On ron, the hand instead scores sanankou, since it only has 3 closed triplets (6-pin, 1-sou, Hatsu). | |||
Example 2: | |||
* {{#mjt: 11233m34566p678s}} Agari: {{#mjt: 2p}} | |||
** On both tsumo and ron, the hand scores iipeikou, since whether a sequence is open or closed is not relevant to the yaku; it only matters if the ''hand'' as a whole is open. | |||
==Strategy== | ==Strategy== | ||