Tile Efficiency 101 (Part 4)

The more I've been playing lately, especially on fast tables, the more I see how you need to have tile efficiency theory very in mind. Especially in nashi-nashi games, where you can't just kui-tan your way to a full hand. So, I decided we should go on. Let's resume from where we last left off.

This time it's only short theory, with tile images and all, as next post will have a lot of hard-text theory (more like brainwashing, in the good way). This is more like a continuation of last time, so, yeah, if you don't like posts that tell you "Hey, you're discarding good shapes!" feel free to skip this and wait for the next part (if you want me to resume this chapter in a single sentence: "when in doubt, matagi").

Source: http://beginners.biz/h_06.html

Taatsu Theory

About complex taatsu and their application.

１．"Ryanmen + Kanchan" Shape

Here let's abord the 6 tiles pattern
.

Not only , it's a shape with uke-iru for the as well.

As this is a shape that comes out rather frequently, let's be careful as to not overlook the kanchan shape in an actual game.

Ex1

Tsumo:

Example 1 is a very famous "WWYD" problem. Discarding leaving the uke-ire for is correct.

Ex2

Tsumo: Dora:

In the case of example 2, discarding it becomes a "ryanmen + kanchan" shape, and we can use the dora.

If the dora wasn't , discarding leaving the possibility for ii pei kou is also efficient.

２． Other complex shapes

Tsumo: Dora:

Getting fixated on san an kou or ii pei kou discarding is a waste.

Since we get to tenpai even by drawing , here we must be serious.

Discarding is an extremely superior discard.

Ex4

Tsumo: Dora:

Discarding and leaving the kanchan ukeire for is a good move.

Of course, if we complete the side of the souzu (bamboos) first, we take the wait, but rather than taking he shanpon uke-ire tiles, it's better to have a higher pinfu probability.

There are many 8 tiles patterns like the following:

3m, 4-7m

2m, 3m, 1-4-7m

6m, 1-4m

1-4m, 5-8m

They don't have a high probability of occurrence, but because it's easy to overlook the uke-ire let's be careful.

Ex5

Tsumo:

Discarding has the widest uke-ire .

Drawing gets us to tenpai.

Discarding or reduces the uke-ire by 4 tiles and is uneffective.

Anyways, this post and the next one aren't published "live." I just used the "scheduled publishment" option. They were written with anteriority, and auto-published at a set date. Meaning that if you want to contact me about this, you'll have to wait. The day this post is published, my girlfriend will have arrived from Japan, so I'll be spending a lot of time with her before she goes back. Don't search for me, for I won't answer. Thank you~ See you guys in January.