Daburu riichi: Difference between revisions

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== Cancellation ==
== Cancellation ==
Double riichi is not possible when anyone makes a tile call before the riichi call, even if you reach tenpai on your first turn. Therefore, a player's own [[kan]] will deny this yaku. In [[sanma]], [[kita]] calls will also deny this yaku.
Double riichi is not possible when anyone makes a tile call before the riichi call, even if you reach tenpai on your first turn. Therefore, [[kan]], even the player's own closed kan, will deny this yaku. In [[sanma]], [[kita]] calls will also deny this yaku.


== Tenhou and Chihou ==
== Tenhou and Chihou ==
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== Defending against double riichi ==
== Defending against double riichi ==
[[Image:Double riichi denied.png|thumb|right|250px|[http://tenhou.net/0/?log=2016032809gm-0089-0000-19c59dbd&tw=1&ts=7 Double riichi] stopped by [[kyuushu kyuuhai]].]]
[[Image:Double riichi denied.png|thumb|right|250px|[http://tenhou.net/0/?log=2016032809gm-0089-0000-19c59dbd&tw=1&ts=7 Double riichi] stopped by [[kyuushu kyuuhai]].]]
Double riichi's greatest advantage, aside from its speed, is the lack of information regarding [[safe tiles]] at the beginning of the hand. Initially, every tile is considered to be dangerous, as no to few discarded tiles show any indication of safe tiles.   
Double riichi's greatest advantage, aside from its speed, is the lack of information regarding [[safe tiles]]. Initially, every tile is considered to be dangerous, as no to few discarded tiles show any indication of safe tiles.   


However, this advantage can be worn away through the [[furiten]] rule. While a player in riichi, every tile not claimed for a win is considered safe against the riichi caller. If a winning tile does not come soon enough, the other players may themselves reach tenpai. If affordable, a player may employ [[sashikomi]], in the hope of dealing into a cheaper hand.
If you have nothing better, then [[honor tiles]] are the best to discard. Since honor tiles cannot form [[Shuntsu|sequences]], they are the least likely to be a winning tile. Guest winds are better than yakuhai as they do not give an extra han.


For more unusual situations, the threat of a double riichi can be averted by ending the hand via [[Tochuu ryuukyoku|abortive draw]]. [[Kyuushu kyuuhai]] can immediately end the hand before the declarer can claim tsumo.  An even more unusual possibility can end with suufon renta. Eventual means can be provided by [[sanchahou]], [[suu kaikan]], or even a risky [[suucha riichi]].
After a few discards, you can benefit from the [[furiten]] rule. When a player is in riichi, any discarded tile not claimed for a win is safe against that riichi. Therefore, safe tiles will rack up quickly. Eventually, players may reach tenpai and win for themselve.s
 
The threat of double riichi can also be ended via [[Tochuu ryuukyoku|abortive draw]]. [[Kyuushu kyuuhai]] can immediately end the hand before the declarer can claim tsumo, as can suufon renta. The other types of draw (suukaikan, suucha riichi, sanchahou) are usually too dangerous to rely on, but they can get you out of the hand.


== External links ==
== External links ==
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