I actually saw this happen just the other day. Someone was waiting on
the 9B to complete a pure straight, but passed on a 6B - forgetting
(or ignoring) that she could also go 123-456-678 to get the 3 sets
needed. Sure enough, the very next discard was a 9B and she was stuck
not being able to call it.
One more thing to note, don't forget that you can be furiten even if
the tile in question wouldn't give you a yaku; in this instance the
player in question had a dragon pung and a half flush so it didn't
matter, but even if that pure straight was going to be her only yaku
she would have been furiten all the same.
Ron = going out on a discarded tile.
Tsumo = going out on a tile which is self drawn.
Mahjong = The hand fully consist out of combinations, most of the time
this means 4 combinations and the eyes (closing pair).
Yaku = minimum requirement to make a legal Mahjong.
Outs = Normally a pokerterm, but with Outs in this discussion i mean
all your possible tiles which would give you Mahjong, even if one or
more tiles would not give you the mandatory Yaku!
Furiten = By error or own choice but you've given up the right to Ron
and can only Tsumo.
1) You are furiten when one of your Outs is amongst your discards, see
later given examples.
2) You're also furiten when you have declared Riichi but let the first
opportunity go to make Mahjong. Either by mistake - not paying
attention or missing the fact that you could make Mahjong - or by
choice - going for Tsumo or going for a bigger hand.
3) You may always Tsumo, and is the only way if you are (temporary)
furiten.
4) You can be TEMPORARY furiten if you don't have declared Riichi and
when one of your outs is thrown and you you don't make Mahjong. This
can either be by choice - maybe you don't get the mandatory Yaku with
that specific Out, maybe you want a bigger hand, etc - or by mistake -
missing the opportunity -.
5) You're no longer TEMPORARY furiten when you discard the next tile
or somebody melded a combination. You're still TEMPORARY furiten even
if it concerns a different tile as long if you don't have discarded a
tile or no combination has been melded.
Examples:
Furiten 1:
You have discarded C1 early in the game, but ending up with C1-C1 &
Red-Red and get only a Yaku for a pung of Red Dragons.
Furiten 2:
You managed to get a 3 sided wait with B4-B5-B6-B7-B8, but luckily
discover in time you've allready discarded a B9 as the first tile.
Furiten!
Temporary furiten:
You're East and you're waiting with a closed hand and Pinfu wait
containing D1-D2-D3-D4-D5-D6-D7-D8 and you need a 3 Yaku hand (Pure
Straight in concealed Hand + Pinfu) and South discard D3 (giving you
only 1 Yaku). Even if West or North discard the D9 (or D6 for that
matter), you cannot Ron because of being temporary furiten. If a
combination is melded or when you discard your next tile and some
unlucky player decides to discard D9 you can Ron it.
Hope this clarifies the situation.
With regards,
GRDavies
The chombo part should only be applied when it becomes a draw. If
somebody else makes Mahjong, no chombo should be applied. But i say
why don't you consider taken it up with the Mahjongtime staff. I don't
know if they use the feedback from this discussion group.