Totsugeki's Problems No. 2

Discussions about the What Would You Discard/Do from the main page.
Your own WWYD are also welcome.

Moderator: Shirluban

Post Reply
Renzo
Fresh Reacher
Fresh Reacher
Posts: 6
Joined: Thu Dec 01, 2011 11:02 am

Totsugeki's Problems No. 2

Post by Renzo » Tue Dec 06, 2011 11:16 am

Difficulty: 2-star
Comment: Another basic problem. Should we be cautious of West two calls?
Round: East 1, 0 honba, dora 7-dot

Scores: Everybody is 27,000. You are East.

East: You have discarded
1-crak :south :west :east 1-bam white-dra
Your hand
7-crak 7-crak 7-crak 1-dot 1-dot 2-dot 4-dot 7-dot 8-dot 9-dot 8-bam 9-bam red-dra red-dra

South: discards
:north :south :east green-dra 9-crak 8-crak
The 8-crak has been called by West for a 789 straight.

West: has called twice 789-crak and pon on white dragon. Discards
:south 1-crak 1-crak :east green-dra 5-dot 4-dot

North: has discarded
1-bam 1-crak 6-bam 6-bam white-dra 9-crak :west
The white dragon was ponned.

Citation: Totsugeki Touhoku, Oshiete! Kagaku suru maajan, Yousensha (2009), page 106.

Edit: Fixed the 15 tile problem and added the citation.
Last edited by Renzo on Wed Dec 07, 2011 8:00 am, edited 1 time in total.

User avatar
Shirluban
Moderator
Moderator
Posts: 780
Joined: Thu Jan 22, 2009 1:53 pm
Location: Svartalfheim
Contact:

Re: Totsugeki's Problems No. 2

Post by Shirluban » Tue Dec 06, 2011 12:23 pm

"Should we be cautious of West two calls?"
Considering his five first discards, it's unlikely he have half-flush, chanta, or shousangen. But he may have sanshouku (and dora).
It's also unlikely he'd open his hand for haku only.
So his hand range from 2 to 5 han.

Our riichi + dora hand don't really worth taking much risks, especially because it's a dead hand (15 tiles :roll: ).
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

sasuraiger
Fresh Reacher
Fresh Reacher
Posts: 34
Joined: Sat Feb 06, 2010 12:25 am
Contact:

Re: Totsugeki's Problems No. 2

Post by sasuraiger » Tue Dec 06, 2011 6:45 pm

Two calls and West abruptly begins to throw middle tiles, starting with one close to the dora. He's got to have what he needs already: either one tile away or tenpai. I doubt that it's a big hand. I have more sets than I need, and this isn't an amazing hand. I'm getting rid of 4-dot and working my way down the pin suit from there.

Iapetus
Senior Reacher
Senior Reacher
Posts: 195
Joined: Sat Jul 16, 2011 1:00 am

Re: Totsugeki's Problems No. 2

Post by Iapetus » Tue Dec 06, 2011 11:42 pm

4-pin is both safe and the most efficient discard, so it's kind of a no-brainer for this turn. Those discards don't really say chanta or honitsu, but 789 sanshoku with the dora for 4000 is possible. The 889 shape discard will be the most risky one. However, we have 3 7-man so west's probably screwed on that too. Riichi chun dora 1 scores high enough to go for, but the shape isn't that good. Sanankou tsumo->haneman is a remote possibility.

xKime
Expert Reacher
Expert Reacher
Posts: 300
Joined: Mon Mar 29, 2010 1:16 am
Location: Buenos Aires, Argentina
Contact:

Re: Totsugeki's Problems No. 2

Post by xKime » Wed Dec 07, 2011 8:53 pm

I figure it would be cheating if I answer to this, given that not that long ago I've bought and pretty much memorized Totsugeki's book, including the problems. This book is seriously the best one out there, IMO.

Anyway, this is one of the few problems I actually got wrong the first time!

Renzo
Fresh Reacher
Fresh Reacher
Posts: 6
Joined: Thu Dec 01, 2011 11:02 am

Re: Totsugeki's Problems No. 2

Post by Renzo » Sat Feb 11, 2012 5:56 am

Apologies for being away. I came back from X-mas and my supervisor wanted me to rewrite a lot of my thesis.

Answer is 4-dot

I you have 1-dot 1-dot 2-dot then you can accept 3-dot making 4-dot redundant.

From here you don't want to try to hope to draw 5-dot. If you wanted that you should have discarded 8-bam 9-bam to begin with.
What you should aim for is pon red-dra dora 1, riichi dora 1 or riichi red dragon. But to get to menzen tempai is on average 10 turns so if the red dragon is discarded you should immediately call.

Post Reply