Referee wrote:South 1, turn 7: Riichi?
South 2. Should have thrown my hand instead of riiching in turn 9? (-12000 is a big ouch here)
South 3-2. The hand that started the discussion. Lesson here is how awful my discarding was. Interesting points: Hell wait vs Furiten fresh tanki, and how to gauge what level of hand you need to get out of deep trouble late in the game.
I would have. It's early in the game, you have a good wait, and the hand is weak without riichi and potential bonuses. If you're not going to riichi, I would have folded once the dealer declared riichi rather than cut the 6p you drew and deal into a potential ippatsu. Further, the next turn you draw 4s and discard it, instead of keeping it and dropping 1s. If you had kept the 4s, then you would have had iipeko in this hand when winning off the discarded 2s.
South 2. Should have thrown my hand instead of riiching in turn 9? (-12000 is a big ouch here)
I probably would have declared riichi as soon as I reached tenpai, discarding 2s instead of 5s (since it doesn't have the potential to pair with the red 5s). However, I don't think it would be horrible to not riichi here, since part of your wait (the 9p) is safe against the other guy. Since there are still two 9p live, it wouldn't surprise me to see someone trying to defend discard one. Even though your hand is weak without riichi, you still pick up the other guys riichi stick and set him back further.
Managing to recreate that ittsu wasn't likely due to there only being one 1s left, so if that's why you didn't riichi, I disagree, even though you amazingly got the last 1s the very next turn.
South 3-2. The hand that started the discussion. Lesson here is how awful my discarding was. Interesting points: Hell wait vs Furiten fresh tanki, and how to gauge what level of hand you need to get out of deep trouble late in the game.
After drawing the third 2s, I think I would have discarded the 6m instead, as the [78999]p shape has five waiting tiles to becoming two sets instead of four, and the dots look dangerous. Further, if you keep the dots in your hand, and only break them up after you happen to draw another 7p or 8p, then you don't end up furiten. After drawing the third 8s, I really think you have to discard the 7p and take the sanankou hand if it comes. Ending up furiten on that 7p is no good, that's massively decreasing the chances you can win on it, and although no 7p have been discarded, none of the high numbers of that suit have been discarded at all except from you, so it's not unreasonable to think two or three might already be in the other player's hands. The chances of the 7p turning out well just seem bad enough that it doesn't hold up to a mangan/haneman (with self-draw or red five).
If we assume that you discarded the 7p to wait on 5m, then when you draw the 3m, you improve your wait a bit by discarding, which surprisingly works out for you when you draw the third 2m. While that sounds nice in retrospect, I think it's still more likely than completing the suuankou. Although I do like yakuman, and I don't know if I wouldn't just go for it when it looks like I'm going to lose anyway.
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It seems like there is a way to make a Tenhou replay link go straight to a specific hand (maybe even straight to a specific turn), but I do not know what it is. If anyone does, I'd appreciate being informed.
EDIT: Nevermind. I saw the link to this match in the other thread that goes straight to a given hand, and it's the "ts" parameter that selects the hand (with 0 being the first hand, apparently).