Riichi strategy: Difference between revisions

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'''Do riichi:'''
'''Do riichi:'''
* When first to tenpai, good wait (>= 6 tiles), 1-4 han after riichi. Even a riichi-only hand with a [[ryanmen]] wait is positive value.
* When first to tenpai, good wait (>= 6 tiles), 5200 points or lower before riichi. Even a riichi-only hand with a [[ryanmen]] wait is positive value.
* When first to tenpai, bad wait, 2-4 han after riichi. A 2 han 40 fu hand (e.g. riichi tanyao) is better than damaten.
* When first to tenpai, bad wait, 1000-5200 points before riichi. A 2 han 40 fu hand (e.g. riichi tanyao) is better than damaten.
* When declaring chasing riichi, with a hand worth pushing, if it's at/below mangan post riichi.
* When declaring chasing riichi, with a hand worth pushing, if it's at/below mangan post riichi.


Note: "First to tenpai" also assumes it is before the 3rd row of discards (turn 12 or earlier). Past turn 12, it can still be worthwhile to riichi, but beware of [[dama]]/open tenpai.
Note: "First to tenpai" generally assumes it is before the 3rd row of discards (turn 12 or earlier). Past turn 12, it can still be worthwhile to riichi, but beware of [[dama]]/open tenpai.


'''Don't riichi:'''
'''Don't riichi:'''
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* With a 4 han (before riichi) bad wait hand.
* With a 4 han (before riichi) bad wait hand.
** A 4 han (before riichi) good wait hand should call riichi if its early in the game, but dama when late in the game.
** A 4 han (before riichi) good wait hand should call riichi if its early in the game, but dama when late in the game.
* With an extreme amount of upgrades. The amount of upgrades need to be very high to skip tenpai. In the early game, to delay tenpai there should be: 6 types of tiles (~24 tiles total) for a wait upgrade, or 4 types (~16 tiles total) to double value. As the game proresses, an even larger # of upgrades is needed to beat riichi.
* With an extreme amount of upgrades. The amount of upgrades need to be very high to skip tenpai; don't delay if there are only 2-4 types of tiles you can draw to improve the wait.
* After point standing analysis. You don't need to riichi with a large lead in all last, or if dama would result in you taking 1st during all last.
* After point standing analysis. You don't need to riichi when already 1st in all last, or if dama would result in you taking 1st during all last.


==References==
==References==
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