Kokushi musou: Difference between revisions

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→‎Development: merge "attempting kokushi" with "kyuushuu kyuuhai"
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Restricted as closed only, this hand must draw at least 12 of the 13 required tile types. If a pair exists within the hand upon [[tenpai]], then naturally, the hand is waiting on the last remaining tile type not yet in the hand. This hand will become [[karaten|impossible]] if all four of any of the tile types are no longer available.
Restricted as closed only, this hand must draw at least 12 of the 13 required tile types. If a pair exists within the hand upon [[tenpai]], then naturally, the hand is waiting on the last remaining tile type not yet in the hand. This hand will become [[karaten|impossible]] if all four of any of the tile types are no longer available.
In order to reasonably develop this hand, your [[haipai|starting hand]] should contain many terminals, generally 9 or more. This gives the option to call [[Tochuu_ryuukyoku#Kyuushu_kyuuhai|kyuushu kyuuhai]], if no tiles have been called by others, and if the ruleset allows. Declining (or not having) this option puts the hand on the path to form the yakuman.


===Attempting kokushi===
===Attempting kokushi===
[[Image:Kokushi real.jpg|thumb|250px|right|Kokushi musou with real tiles.]]
[[Image:Kokushi real.jpg|thumb|250px|right|Kokushi musou with real tiles.]]
In order to for this hand to be reasonable, your [[haipai|starting hand]] should contain many terminals/honors, generally 9 or more. This gives the option to call [[Tochuu_ryuukyoku#Kyuushu_kyuuhai|kyuushu kyuuhai]], if no tiles have been called by others, and if the ruleset allows this [[abortive draw]]. Declining (or not having) this option puts the hand on the path to form the yakuman.
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Kokushi musou juusan menmachi is very rare. Out of all random tile draws that result in tenpai for kokushi, the chance of naturally drawing all 13 tiles without a single duplicate is approximately one in 9500 (~0.0106%). The only "consistent" way to achieve the double yakuman is to complete kokushi via tsumo, but discard the pair and hope to complete the hand while in furiten.
Kokushi musou juusan menmachi is very rare. Out of all random tile draws that result in tenpai for kokushi, the chance of naturally drawing all 13 tiles without a single duplicate is approximately one in 9500 (~0.0106%). The only "consistent" way to achieve the double yakuman is to complete kokushi via tsumo, but discard the pair and hope to complete the hand while in furiten.
===Kyuushu kyuuhai===
{{main|Tochuu ryuukyoku}}
Realistic chances to complete kokushi musou may require a hand to begin with at least 9 yaochuhai.  Even so, at this point, this gives a player the option to defer and abort the hand, rather than trying for kokushi. If a tile has been [[naki|called]] before your first turn, then kyuushu kyuuhai becomes unavailable. Also, some rulesets may disable the abortive draw.


===Discard characteristics===
===Discard characteristics===
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