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Thursday, September 2, 2021

Look to a good form of one before for ready


 








Answer



Commentary

Look to a good form of one before for ready

At a glance,  it is no risk to discard 2m or 4s fixing Ryan-men.

Indeed, discard 6p lose waiting for 4 tiles of 7p.

And discarding 2m or 4s lose 2tiles of each +2 tiles of 9p.

The difference is that  this hand progress.

When you have Ryanmen × 5 parts , We need to get rid of one of them.

If it comes to that way, you should decide 4 Ryanmen first.


How do you do ??
And if you chose  either  Ryanmen,  you have to leave useless tile.




How about this.
you discard 4s, and make perfect one before for ready.
There is no useless tile in this hand.




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Takoyaki is one of my favorite food.

Do you know ??








Wednesday, September 1, 2021

Calculating Expected Value

 









Answer





Calculating Expected Value

Expected value is calculated by score × winning probability.

This hand, discarding 2m is fix "Frat hand"  " All simples" "Triple sequences" but double sided waiting.

Discarding 5m is fix "flat hand" only, but triple sided waiting.

Which is the better option ??  

The winning probability of double sided wait (Ryanmen) is about 70%.

Simplified expected value  is about 70% × 8000 =5600

And that of triple sided wait is about 80%.

Simplified expected value  is about 80% × (1000×1/3(1m)+2000×2/3(4 7m))=1500

The principle is to focus the score

Basically, it is too difficult to double the winning probability.

So if you fix rising one more the role (Yaku), you should fix the role which make your hand's score 
double.

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I tried pasta in Pizza KOZOU where I have often eaten Pizza.

Vongore Bianco is my favorite taste.

Very tasty but I prefer Pizza in this restaurant.







Monday, August 30, 2021

Care for Ryanmen-Kanchan

 










Answer

Safest





Most dangerous





Commentary

Care for Ryanmen-Kanchan

At a first glance, 8m seems relatively safety.

But n case of declaring 2, 8 is dangerous.

Do you remember Ryanmen kanchan??

It is common to leave 2 till ready hand in Ryanmen-Kanchan.

And this hand, there is one more notable point one before declaring round.

North is Obviously "safety tile".

If you have Ryanmen and safty tile like below, you discard north ?? 



So 4m is relatively safe.

Of corse, 1-4 is dangerous, but 1 was discarded.

In this point of view, 3m is more dangerous than 4m.

But this hand, 1m was discarded in 4th round.

It is too early, to discard 1 from 1 1 2 2.

This hand has called for Riich by this hand.




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A spider has moved to the window of my house.

But I have never seen the insect in his nest.

In the first place, is there the nest ......??

I am very worry about his starving.......











Sunday, August 29, 2021

Statistics of mahjong


 








Answer




Commentary

"Perfect" one before for ready

The form composed by complex serial pair +Ryanmen is called  "perfect one before for ready"

In addition to Ryanmen, there is acceptance to make triplet.

There is 4 tiles more than Ryanmen-Ryanmen one before for ready.

But recently, it is calculated that this advantage is too little.    (reffernce ; this book)

Especially, the part of complex serial pair is 4 5 6 like this case exceed the risk of leaving the tile.

If other player call for Riichi, you have to discard 6 (in this case) to the Riich in order to call Riich.

Ryanmen-Ryanmen wait for 16 tiles.

And this perfect one before for ready wait for 20 tiles.

In 16/20 case, Ryanmen is complete first.

And statistics reveal the risk exceed to the merit of leaving dangerous tile till ready hand.

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She really interested in, and smell it , and touch.

Be a nice butterfly.



Saturday, August 28, 2021

The timing of discarding the safety tile

 










Answer





Commentary

The timing of discarding the safety tile

Why this player keep North that had already been discarded at 2 round till ready hand.

This is "safety tile"  in case other player call for Riichi.

Safety tile reduce acceptance of hand, so it must not deal in by the tile.

Choose the most safety tile, for example, the last tile of honors tile.

And the declaring tile is safety tile, the hand is likely to wait by Ryanmen.

If you have Ryan-kan and Ryanmen like



Do you discard 6s in this hand?? 

You can think "Declaring with safety tile means, the hand is Ryamnen"

This hand is below



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Today's Pizza 


















This is very good.

This hard and harf ; margherita and quattro formaggi isn't on menu.

I asked to make, and the stuff readily agreed.

So happy.







See through the cheating line (Suji cheating ; suji hikkake)


Answer





Commentary

See through the cheating line (Suji cheating ; suji hikkake) 

This hand is not so no outstanding feature.

Maybe flat hand or so.

All of the option; 8p , 7s, 5m  are Suji of 5p, 4s, 5m.

Which is the most safety and which is the most dangerous ??

This is very simple, and you have to remember that.

"The later in round, the more dangerous".


All of players would like to wait by Ryanmmmen.

So all players want to complete Kanchan.

Ryankan is not likely to discard till ready hand.

Early discarding 5p imply the player have 2p of 8p, and 1-4 or 6-9.


This hand is below



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Kei-toku-Chin is one of the most delicious restaurant there.

Especially, Mayo-Tohu is really hot and tasty.

You gotta try it.







Thursday, August 26, 2021

Triple sequence (Three colors)


 









Answer





Commentary

River of triple sequence (three color sequence)

All suits are evenly discarded.

But looking well, there are no tiles under 5.

In this pattern, you should suspect of triple sequences of under suits.

Particularly,  Discarding 6, and Kanchan (gut shot) waiting for 3 from 2 4 6 is one of the most fliquentry.

Because, it is line cheating (suji cheating) , 3 is easily to get. 

And, if you draw 5, one of four tiles is red dora.

If you have 5 6 6 , it is too early to discard 7m. 

In this case, you may leave possibility of triple sequence of 5 6 7.


This hand is below




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Today is too hot.

Summer is coming back to yokohama.









single wait or kanchan wait??