(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
GN[San-ren-sei joseki trick]AW[dd][dp]AB[pd][pj][pp]LB[pd:A][pj:B]C[In this screencast, we will show an interesting "trick"-move that Kim learned when he was studying go in China.
The trick can be used in moyo games when the opponent has two high stones, one positioned on a hoshi starpoint (A) and the other on a centre starpoint nearby (B). A perfect example is the san-ren-sei fuseki formation which you see here. 

Unlike the flexible move we showed you last week, there are some minor drawbacks to the trick play we will show you in this episode.
However, when used at the right moment and under the right circumstances, this move can be powerful and a refreshing addition to your joseki knowledge.]
;W[nc]C[Playing against large influence frameworks such as the san-ren-sei opening requires caution in combination with reduction. 
A normal way of "reducing" blacks influence by preventing black from extending from his moyo, is to approach one of the hoshi stones.]
;B[lc]LB[qc:A][ne:B]C[A black pincer is usual in this situation, aiming to pressure white's lonely stone and at the same time continuing the tactics of large scale influence. 
To such a pincer, whites mosr populair tactic is going into the corner and making life fast: A.
Running out with B is also possible, if you want to prevent black from getting too big of a moyo.
]
(;W[qf]LB[qc:B][nd:A]C[Instead of jumping into the corner, white can also try the tricky double approach.

Now the usual joseki response for black would be to play A: that will lead us to the trick play! 
However, the minor drawback of this situation is the possibility of black playing B instead.
]
(;B[nd]C[A normal way of playing: joseki.]
;W[md]
;B[mc]
(;W[qd]LB[oc:B][qc:A]C[In this kind of shape, there are two possible joseki answers: A and B. 
A is correct now and aims for moyo. B is slack since it's purely territorial and does not cooperate with the other moyo-stones.]
(;B[qc]LB[od:A][qi:B]C[The proper move.
Here, whites normal response which leads to a "standard" joseki is A. 
White B is the trick play!
]
(;W[qi]C[The trick move!

Most players will never have seen this move, which makes it a powerful surprise and therefore useful to memorise. 
Not only is this move tricky and treacherous, at this point there are also no drawbacks for white, which makes it a sort of joseki!]
(;B[qj]C[Wrong. Black is tricked!]
;W[od]C[White goes back to the "joseki" variation, leaving black no choice but to follow: a one-way street.]
;B[ne]
;W[pc]
;B[pe]
;W[oe]
;B[of]
;W[oc]
;B[pf]
;W[nf]
;B[me]
;W[qe]
;B[ph]C[Now this jump (like in the normal joseki) doesn't work as well as it should.]
;W[qb]
;B[rc]
;W[rb]
;B[qg]
;W[rg]
;B[rh]
;W[sf]LB[ld:1][le:A][qh:2]C[Good for white!

In the standard joseki, black has only one major weakness at 1, which he fixes by coming back to A. 
Here however, black has the additional weakness of 2! Black has two problems at the same time, and is forced to watch how one of them will be exploited by white.])
(;B[od]C[Proper response. ]
;W[qj]LB[od:A][pj:B]C[This result is by no means bad for white. Black secured a big corner profit with A, but his B stone is severely hurt. 
On top of that, blacks original plan of creating a moyo has been destroyed.])
(;B[qe]C[Another possibility, which we took from a professional game between Zhou Ruiyang 3p and Niu Yutian 6p from 2006 (see bonus SGF file).]))
(;W[od]C[The normal joseki.]
;B[ne]
;W[pc]
;B[pe]
;W[oe]
;B[of]
;W[oc]
;B[pf]
;W[nf]
;B[me]
;W[qe]
;B[ph]
;W[qb]
;B[rc]
;W[rb]
;B[qg]
;W[rg]
;B[rh]
;W[sf]
;B[le]LB[oa:C][nb:A][ob:B][pb:D]C[The joseki ends here. 
This again is a typical example of a devision between territory and influence: solid points vs. raw strength. White got a big and secure corner territory, while black followed his original opening strategy and created huge influence in the centre.

Black can play the sequence A-D before M15 (now) or keep them as ko threats for later.]))
(;B[oc]C[Wrong, slack.]
;W[qc]LB[pj:A]C[Good for White. 
The reason: blacks A-stone is now positioned inefficiently and on a weird spot. 
Blacks moyo plans have more or less been canceled. ]))
(;W[qc]C[Wrong.]
(;B[qd]C[Correct, black punishes. ]
;W[od]
;B[ne]
;W[oe]
;B[oc]
;W[pc]
;B[nb]
;W[ob]
;B[nc]
;W[pe]
;B[fc]C[Good for Black. 

According to "A dictionary of modern Fuseki - The Korean style", published by the Kiseido Publishing Company in 2004:
"This is slightly better for Black because, even though he has failed to make a moyo on the right side, he has built up strong influence at the top."])
(;B[oc]C[Wrong, black lets white off the hook.]
;W[qd]C[Good for White. ])))
(;B[qc]LB[lc:1][nd:A][pj:2]C[A powerful move. 

When used against an opening like the san-ren-sei, whites double approach can sometimes be a dangerous tactic.
In stead of playing A, black can choose to play on the 3-3 point when he has 2 stones on the outside to help him with the fight.
]
(;W[oe]LB[lc:1][pj:2]C[Wrong. Usually the shape move, but here this leads to a better position for black when black has stones to help him on either side. ]
;B[od]
;W[nd]
;B[ne]
;W[of]
;B[me]C[Black has the advantage in this fight.])
(;W[ld]C["Proper" move for white. However, this also leads to a result which favors black. ]
;B[kd]
;W[md]
;B[oe]
;W[kc]
;B[jc]
;W[kb]
;B[jd]
;W[lb]
;B[fc]
;W[cf]
;B[pg]C[Slightly better for Black. Too "easy".])))
(;W[qc]C[The most standard joseki against the san-ren-sei opening. ]
;B[qd]
;W[pc]
;B[od]
;W[nb]
;B[me]C[White took the territory in the corner and is safe. Black cotinues his plan of influence on the outside and towards the centre.]
;W[nq]C[Since white has sente, he can approach the other corner. ]
;B[lq]C[The same kinds of joseki can follow in this corner. ]
;W[qq]
;B[qp]
;W[pq]
;B[op]
;W[nr]
;B[mo]C[Such fuseki shows two completely different tactics for black and white: influence versus solid territory.
These playing styles often clashed in the professional matches between the two Japanese masters Takemiya Masaki 9p and Cho Chikun 9p.
You can find several games between them - with this opening - in the episodes "bonus" tab.])
(;W[ne]
;B[pf]
;W[kd]C[Another joseki. White will make a strong wall facing the centre, partially negating blacks influence.]))