single wait or kanchan wait??

Dropping one sequence is 7 pairs

Answer

safer

Dangerous

Commentary

Dropping one sequence is 7 pairs

It's been a while since I've done any river reading.

It's almost all in the title, but this hand is dropping 5 6 7 and one element. 

This is  a sign of 7 pairs.

n other hands, one element is rarely discarded from the hand, except in flash.

So North is the most dangerous.

And In rules with red dora, it is quite common to wait for 5.

But, waiting on 5 in 7 pairs is not recommended.

In this hand

It's been a while since I've done any river reading.

How to discard Penchan

 

Answer

Commentary

How to discard Penchan

The choice was between Penchan and Kanchan, and everyone may choice to dropp Penchan.

So, which should you discard first, 8 or 9??

The theory is to discard the dangerous tile first, but in this case, you had better to discard 8 first.

The reason for this is the form when the 6 is drawn.

The following is the form when 6 is drawn, and this form is "strong" with a lot of variation. In this case, it is rather 6 8 that should be discarded

.

This is a bit similar to the previous article, but to summarize

when dropping a penchan, imagine a form with 4 and 6, and then discard!

Priorities of discarding Penchan

 

Answer

Commentary

Priorities of discarding Penchan

In the first game of East, it is double East, an opportunity hand.

In the first game of East, it is double East, an opportunity hand.

Even if the hand becomes ready hand, there is a high possibility that it will only be waiting for Penchan.

In this case, I would like to drop the penchan and look to  multi-wating around 6p (preferably dora) or by drawing Sozu.

So which penchan should be dropped??

In Wanzu, there are only 1 valid tiles (3m), but in Pinzu, there is RyanKan by drawing 4.

Dropping the Penchan also has its own priorities.

It's a small detail, but it's worth remembering.

7 pairs is the last card.

 

Answer

Commentary

7 pairs is the last card

Basically, it is a special role that exists as the last hop.

 It is a special role that allows you to make Haneman (Riichi, self draw, 7 pairs, dora x 2) with any hand.

However, you need to remember that the probability of that winning rate is extremely low.

The occurrence rate in Tenhou is only 2%.

If you have another role to aim for, don't hesitate to prioritize that one.

In this case, it is the valuable tile x 2.

With the same 2 roles, the winning ratio will increase overwhelmingly.

If 3s is not a dora, then 3m or 5s for all ttriplets is also possible.

However, I don't look to discard Dora here.

Which is more advantageous, 4 or 6?

If you discard the 6, you won't be able to use it when you draw a dora.

34566 → 33456

Always keep in mind the change from 34566 to 33456.

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The city has been completely transformed into Halloween.

But the weather is great and it's still hot in Japan.

Today I'm wearing short sleeves and eating a pumpkin pie from Halofin.

Answer

②Concealed

Commentary

In the last article, I said that if you wait  Ryanmen, you should  call for following Riichi basically.

How about this case ??

Using the statistical possibliity from the last article, let's calculate the rough expected value.

Right side player has 5 dora. Hanneman is confirmed　(Riichi ＋Dora 5).

Following Riichi in the 14th round, the deal in ratio is approximately 15%.

Expected value of Deal in is roughly 13,000 (Haneman + Riichi fee) x 15%＝1950.

Win ratio is roughly 45% x 2700 points (average score for Riichi only in case of hided dora x 3) is 1215.

The rest is the probability of your opponent's self-draw x 3000 or 4000, but this can vary greatly depending on how your opponent waits.

If the opponent wait for Ryanmen , the self drawing probability is 17%, so the probability is approximately 4000 (30% chance of having a concealed dora x 3, which means there is at least one concealed dora) x 17%,= 680.

In addition, this hand has a large number of safty tiles for the Riichi, so we can decide that fold is better for this hand.

However, 

① If you really don't want to be won by the right side player.

② I don't have a safety tile.

If you have such conditions, it is acceptable to go to Riichi even in such an extreme situation.

Even if you can see Dora 5, the difference in numbers is about this much, so you can see how strong Ryanmen following Riichi is. 

Ryanmen ready hand is following Riichi in any situation.

 

Answer

①Riichi

Commentary

Ryanmen ready hand is following Riichi in any situation

The theory of flat hand is always Riichi, but what if another player has already called Riichi first??

With or without a flat hand, following Riichi is the rule for Ryangmen ready hand.

The figure below shows the win ratio and deal in ratio of following Riichi.

The approximate win ratio is always three times the deal in ratio, regardless of the round.

In this case, in particular, I am the dealer, and dealer's score is always 1.5 times higher.

However, even if the player who Riichi'd first is the dealer, the basic rule is following Riichi.

This is because there is an overwhelmingly high possibility that you will win.

Mangan waiting for Ryanmen is basically concealed

 

Answer

②concealed

Commentary

In this hand, it seems that many people think if I call for Riichi and self draw, I can get Heinemann!!

What do the statistics say??

Not only was there no difference regardless of the round, but in the 12th round, the expected score was higher for concealed.

Especially at the end of the game, Mangan waiting for Ryanmen is basically concealed.

Conceal your 5200 hand

 

Answer

②　Concealed

Commentary

 Last article said that the hand only flat hand is always Riichi.

How about all simples without flat hand ??

In this case, Riichi is bad choice.

On the far left column is the average score of winning.

The others are the statistical balance for each round.

There is almost no differences between calling riichi and concealed hand.

One of the reasons is the peculiarity of the score of 5200.

If you call for  Riichi from 5200, the score would not be doubled.

 you would only be paid 1000 points for Riichi fee and 2800 points would be added.

When it comes to round 12, the difference is only 100 points.

Still, even at 500 points, Riichi is still statistically ahead, so I think it's worth considering until round 8. Basically, concealed is the way to go.

Ready hand only Flat hand is always Riichi

 

Answer

①　Riichi

Commentary

Ready hand only Flat hand is always Riichi

This is a Flat-hand-only in the 12th round.

Whether to pay 1000 points riichi fee in order to get  more 1000 points of the hand of 1000 points.

Just remember this.

Flat hand only is always riichi !!

On the far left column is the average score of winning.

The others are the statistical balance for each round.

In the 12th round, even if you keep concealed, in the long run, you will end up in the negative.

Even if you don't win the hand, the effect of letting other players folding is tremendous.

You should also reach at the end of the game to reduce the possibility of your hand dealing in and to increase your chances of getting a no ready hand fine.

Patterns that should be back from ready hand even if it breaks the completed elements

 

Answer

Commentary

Patterns that should be back from  ready hand even if it breaks the completed elements

If you are an advanced player, you don't need an explanation, and most people will discard the 1m.

It is ready hand whether you discard 2m or 4s.

Moreover, drawing 1m,5m, 7m, 3p, 5p, 3s, and 5s gives this hand Flat hand.

And 4m, 8m, 2p, 6p, 2s, and 6s is good form to call Riichi.

Still, we should discard 1m  here.

The reason are that, 

①　Score

②　Whether or not you can call

If you discard 1m, you can back to ready hand by drawing 4m, 8m, 2s, 5s, 3s, 6s.

This can clear  the criteria (6 or more types) for baking from ready hand.

 And, you can call for Riichi by twice or Four times the score ( flat hand, and all simples).

If you draw 4m or 8m, you can get triple sequences.

Next merit is that whether or not you can call.

You don't need to draw 4m, 8m, 2s, 5s, 3s, 6s yourself.

If left side player discard it, you can call for chow for the same amount of points as if you had discarded 2m and 4s.

Acceptance of 6 or more types can back from ready hand.

In addition, if your hand is the above two conditions , you 'should'  back.

Kanchan of 3 tiles left vs Penchan of 4 tiles left

 

Answer

Commentary

Kanchan of 3 tiles left  vs  Penchan of 4 tiles left

Probably many players will drop the Penchan and keep the Kanchan.

The reason for this is that Kanchan can change to Ryanmen.

In reality, however, the possibility of Kanchan changing into Ryanmen is not that high.

The change to Ryanmen requires drawing one of the basic 4 or 5 or 6, and the possibility of drawing the remaining 4 tiles of Penchan is actually much higher.

With 3 7 "not even a single tile in the river", the odds of winning a Penchan are not that low.

If even one tile is visible, the win rate is drastically reduced.

In the case of only one tile of wait, remember that the difference between heaven and hell is whether there is only one in the river or not.

The way to take temporary ready hand

Answer

Commentary

The way to take temporary ready hand

Discard 9p　　　 →wait for Shanpon

Discard 7p or 8p    →wait for Single wait

Discard 1s 　　　 →wait for one before for ready

First, discarding 1s is bad choice.

If you draw 2s or 3s, you can wait 6-9p.

But the possibility of drawing 2s or 3s is only 6% per one rounds.

This is no way to compete.

So which is more advantageous, a single wait or a shannon wait ??

Shannon wait can not change to wait.

But single wait is very flexible.

If you draw 2m, 4m, 6m, 8m, and 1s, you can wait Ryanmen and complete Flat hand.

If you draw 5m, you can wait triple wait, 2-5-8m.

Of curse,  you can wait Dora, if you draw North.

8p is superior to 7p because 8p is safer to 7p.

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Burn your heart

Today, Demon slayer the movie is on TV.

I am writing this while watching it.

This is the first time for me to watch this.

The film was the best-selling film in Japanese film history, grossing over 30 billion yen (300-million USD).

Rengokusan-so called " the man of 30 billion" is very reliable and cool.

Criteria of backing to one before for ready

Answer

Commentary

Criteria of backing to one before for ready

If you discard 5m, this hand is ready.

And if you call Riichi, this hand has Mangan ; riichi, All simples, double sequence, and dora, it's not bad.

Statistically, you may call riichi.

But this Kanchan is too difficult to win experimentally.

Many player wants to back to one before for ready.

 When  would you be allowed to retrogress??

One criteria is 

"Back to one before for ready  if there are more than six tiles of valid alternatives"

Why 6??

The probability of drawing the desired tile in one round is approximately 3%  (1/34).

If there are 6 types, that's about 20% per one drawing.

 There's a good chance you'll get one of these tiles within 5 rounds (20×5＝100)

If it takes longer than five rounds, it's better not to wait in most cases.

→Reference past article

In this hand, 1m, 4m, 7m, 4s, 5s, 7s, 8s, is valid to wait Ryanmen.

If you draw Souzu, you can wait triple sided, and look to triple sequences of 4 5 6.

You should back in such a case.

-------------------------------------------------------

This Shochu (Japanese liquor similar to vodka) is aging with the sound of Mozart.

Sound Ripenin is that means.

I don't know the reason, but the The frequency of Mozart's music is said to be the most mellow.

In fact, it's pretty good.

When Kanchan is favorable

 

Answer

Commentary

The case of Kanchan is favorable

As mentioned in the last article, it should be remembered that, basically, Shanpon is more advantageous than Kanchan.

If you remember even the reasons for this, you can see the exceptions.

The biggest advantage of Shanpon is that "it's likely to be a trick riichi."

So, naturally, Kanchan is more advantageous for Shannon, which is difficult to trick riichi.

In this case, you have to draw 4 tiles that are 1p,7p, 3s, 9s. 

 Of course, in reality, there are other factors as well, so this is not the only factor to consider.

6p 6p 8p ＋3s 3s 

From this form, kanchan is statistically favored, though by a small margin.

In the case of 6 6 3 3, 3 is actually much more likely to come up, so the comparison is between 3 and 7.

If that is the case, kanchan with more 7's has the advantage.

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Since September, the duty room has been changed to a room with a very beautiful night view.

I sleep with a view of Yokohama and Minato Mirai late at night.

Shanpon is superior to kanchan

Answer

Commentary

Shanpon is superior to kanchan

Basically, shanpon wait is superior to kanchan.

In this case, Kanchan wait  of 3m is 4 tile, and shanpon wait of 2m and 3s are 4 tile, it is square.

Difference is possibility of making "trick Riichi".

If you draw 5m or 6s after call for Riichi, this hand chage to "trick Riichi" .

But if you want to make trick Riichi when you wait Kanchan, you have to draw only one tile in this case it it 6m .

Therefore, if you have already discarded 6m, discarding 2m and waiting 2m is superior in this hand.

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I love tom yum kung.

I ate lunch Yabin today.

It's delicious, but when I think about it, why would an Indian restaurant serve Tom Yum Kung....??

Calling for chow and giving up winning , or wait until the end on your own

 

Answer

②　Ignore

Commentary

When is the timing for calling to ready hand without a role ??

Ready hand just a formality means ready hand without a role.

It almost means giving up on winning except for the last tile.

But, If your hand are not ready hand, it means the same thing.

Moreover, if your hand is still one before for ready, you have to pay 1500 point.

 And if you are dealer, your turn is over.

Calling for chow and giving up winning , or wait until the end on your own.

Which is more advantageous ??

The answer depends on the round.

It's better to wait until round 14.

From round 15, it is advantageous to call in all forms regardless of the number of dora.

So in this hand, you had better to ignore.

---------------------------------------------------------

It was a beautiful day yesterday, so I went to the zoo.

Surprisingly, there are many free zoos in Yokohama.

The squirrels were eating oranges, which was very cute.

The way to choice of three pairs

 

Answer

Commentary

The way to choice of three pairs

As I mentioned in my last article, three paris is the weakest form so you have to break up one of the three pairs.

① Including complex serial pairs → Fix it Ryanmen.

How about this case ??

Looking for 5 blocks, Manzu ; 2 elements, Pinzu; 1 elements, Souzu ; head ＋1 elements.

From this form, you had better not to touch Pinzu and Souzu.

Manzu can change form, if you draw 5 6 8 9, so you are not likely to be gotten backfire.

So the next theory of handling of three pairs is 

② Discard the tiles of the pairs close to consecutive tiles. 

     Otherwise, you remember " don't discard the isolated pairs."

---------------------------------------------------------------

Today's lunch is PizzaToast of KOMEDA coffee.

This shop is very famous as Contra-photography fraud.

Often, what looks like an ordinary menu in the picture turns out to be ridiculously large when it comes out.　

Be careful, and you had better not to order Katsu Sand with side menu.

Three pairs is the weakest form

 

Answer

Commentary

Three pairs  is the weakest form

In mahjong, three pair is the weakest form.

If you have four pairs, you can look to 7 pairs, all triplets, and so on.

If you e calculate, you can tell three pairs will be the most narrowly accepted in almost all of the situation.

Thus, when you have three pairs, you have to crush the one of the pairs.

So which pair to break??

There is an order to this.

The most priority to break up is the complex serial pair.

If you have three pairs including complex serial pairs, You should be trained to discard this  as a spinal reflex.

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It was a beautiful autumn day today, as if the typhoon we had yesterday was a lie.

It looks like it will be another fine day tomorrow, making it a perfect day to go out.

Tomorrow is a national holiday in Japan, and work will be closed.

Straight vs triple sequences part2

 

Answer

Commentary

I will tell you again and again, basically, triple sezuences is more advantageous than straight.

But last article said the exception of this rule.

How about this pattern ??

In this case, to begin with, 2 tiles are needed in each roles. 

Triple sequences needs 1m and 3p.

Straight needs 5s and 8s.

But score is quite different.

Triple sequences can add the terminal in every group.

So you should give up straight and discard 4 to fix 1 2 3.

If you draw 5s, you had better not to discard 9s, but directrly discarding 5s.

And  if your left player discard 8s, you should  call for chow.

Of course, 1m must call for chow.

3p is controversial.

Because if you call 3p, very little chance for any player to discard 1m.

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