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* [http://tenhou.net/0/?log=2014030918gm-0089-0000-22ae5fde&tw=2&ts=6 Ittsuu] as [[kazoe]] | * [http://tenhou.net/0/?log=2014030918gm-0089-0000-22ae5fde&tw=2&ts=6 Ittsuu] as [[kazoe]] | ||
}} | }} | ||
'''Ikkitsuukan''' {{kana|一気通貫}}, or '''ittsuu''' {{kana|一通}} for short, is a [[List of yaku|yaku]], defined as three distinct [[mentsu|tile groups]] containing 123, 456, 789 of one suit. | '''Ikkitsuukan''' {{kana|一気通貫}}, or '''ittsuu''' {{kana|一通}} for short, is a standard [[List of yaku|yaku]], defined as three distinct [[mentsu|tile groups]] containing 123, 456, 789 of one suit. This forms a single suit "straight" of 123456789, similar to the poker hand. This yaku can be scored open or closed, but if in an open hand, it [[kuisagari|loses 1 han]] of value. | ||
==Tile diagram== | ==Tile diagram== | ||
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===Counter example=== | ===Counter example=== | ||
Having all the tiles from 1-9 in one suit is not sufficient to compose this yaku - they must form as sequences of 123, 456, 789. | Having all the tiles from 1-9 in one suit is not sufficient to compose this yaku - as mentioned above, they must form as sequences of 123, 456, 789. | ||
{{#mjt:12344m56p}} {{#mjt:5'677'89m}} Waiting for: {{#mjt:4p}} or {{#mjt:7p}} | {{#mjt:12344m56p}} {{#mjt:5'677'89m}} Waiting for: {{#mjt:4p}} or {{#mjt:7p}} | ||
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Despite being easy to memorize, ittsu is one of the more difficult yaku to obtain. | Despite being easy to memorize, ittsu is one of the more difficult yaku to obtain. | ||
[[Sanshoku]] is worth the same (2 han) and has a similar requirement (3 | [[Sanshoku]] is worth the same (2 han) and has a similar requirement (3 specific sequences). However, sanshoku occurs in winning hands more than twice as often as ittsu. This is likely because ittsu's 123 and 789 sequences are harder to form than other sequences. | ||
==External links== | ==External links== |
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