I've noticed recently that there are different fu values in general use. Most of the english speaking internet uses values in keeping with [Whitney 1964] and EMA rules. However, JPML, and by extension USPML rules, uses double the value for concealed triplet of honors. (I thought there was another difference, but it was 5 AM...)
So, which value do you play with? Does it matter all that much considering the balance of the game? Any other thoughts?
Fu Values
Moderator: Shirluban
Re: Fu Values
You'd better avoid posting at 5AM, because EMA and JPML (and any other rules I've seen) use the same fu values.
Cats don't do タンヤオ (tan-yao) but タニャーオ (ta-nya-o).
World Riichi Championship Rules 2022
Comparison of riichi rules around the world
World Riichi Championship Rules 2022
Comparison of riichi rules around the world
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Senechal
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Re: Fu Values
^seconded^
Triplet fu points start at 2 points for an exposed triplet of simple tiles.
The points are doubled if they are terminal tiles or a concealed triplet. In the case of a quad, they're multiplied by 4.
ALL THESE MODIFIERS ARE CUMULATIVE
4 points (exposed terminal)
8 points (exposed simple quad)
16 points (exposed quad terminal)
If either of these were concealed, they're worth respectively 4, 8, 16, and 32 points. I don't believe however that you're certain what is standard and what isn't over the internet. Aside from this above, a pair of value tiles is 2pt, self pick is another 2pt, and "single waits" (inner sequence 4_6, single tile for pair, or the pair in an excentric wait 6667 +7) are also 2 points. "Open pinfu" grabs an unspoken 2pt just so the hand doesn't tally to 20 (but you need a yaku anyways). Also, if it wasn't clear, sequences are worth nothing, and "double wind" pairs are effectively worth 4pt.
Other than that, all hands start at 20pt. An extra +10 is awarded for concealed hands (whether in riichi or not) won off a discard.
This is everything. I wouldn't trust a 1964 manual to be the reference of mahjong.
(Referee is right, side waits are 2pt, and 7 pairs is a flat 25pt. everything gets rounded up. Sorry about missing that stuff)
Triplet fu points start at 2 points for an exposed triplet of simple tiles.
The points are doubled if they are terminal tiles or a concealed triplet. In the case of a quad, they're multiplied by 4.
ALL THESE MODIFIERS ARE CUMULATIVE
4 points (exposed terminal)
8 points (exposed simple quad)
16 points (exposed quad terminal)
If either of these were concealed, they're worth respectively 4, 8, 16, and 32 points. I don't believe however that you're certain what is standard and what isn't over the internet. Aside from this above, a pair of value tiles is 2pt, self pick is another 2pt, and "single waits" (inner sequence 4_6, single tile for pair, or the pair in an excentric wait 6667 +7) are also 2 points. "Open pinfu" grabs an unspoken 2pt just so the hand doesn't tally to 20 (but you need a yaku anyways). Also, if it wasn't clear, sequences are worth nothing, and "double wind" pairs are effectively worth 4pt.
Other than that, all hands start at 20pt. An extra +10 is awarded for concealed hands (whether in riichi or not) won off a discard.
This is everything. I wouldn't trust a 1964 manual to be the reference of mahjong.
(Referee is right, side waits are 2pt, and 7 pairs is a flat 25pt. everything gets rounded up. Sorry about missing that stuff)
Last edited by Senechal on Sat May 22, 2010 1:55 pm, edited 2 times in total.
Re: Fu Values
So: 20 points is only for Pinfu hands, 25 for Chitoitsu (seven pairs).
Rest is: Concealed Ron: 30 points. Tsumo (Concealed or otherwise, but it is a yaku only if concealed): 22 points. Otherwise (Open Ron): 20 points.
Plus pair: 2 for dragon, own wind, or round win. A double wind scores 4.
Plus wait: 2 for closed wait (waiting for the middle of a chi), inside wait (waiting for 3 in 123 or 7 in 789), or pair
Plus sets: 2, 4, 8, 16, or 32 each, depending.
Then you round UP to the next 10. Always up.
I'm trying to find a way of doing it faster, but I'm not sure if there is one. Trying to see if there is an easy way to categorize the 30 fu hands.
20 fu 5 han, 40 fu 4 han, 70 fu 3 han, 120 fu+ is Mangan. (I'm not including the 2 han for going out).
Rest is: Concealed Ron: 30 points. Tsumo (Concealed or otherwise, but it is a yaku only if concealed): 22 points. Otherwise (Open Ron): 20 points.
Plus pair: 2 for dragon, own wind, or round win. A double wind scores 4.
Plus wait: 2 for closed wait (waiting for the middle of a chi), inside wait (waiting for 3 in 123 or 7 in 789), or pair
Plus sets: 2, 4, 8, 16, or 32 each, depending.
Then you round UP to the next 10. Always up.
I'm trying to find a way of doing it faster, but I'm not sure if there is one. Trying to see if there is an easy way to categorize the 30 fu hands.
20 fu 5 han, 40 fu 4 han, 70 fu 3 han, 120 fu+ is Mangan. (I'm not including the 2 han for going out).