(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[Baduk]PB[Movies]
;B[dc]
;W[cp]
;B[pp]
;W[pd]
;B[eq]
;W[do]
;B[ce]
;W[hq]
;B[mq]
;W[fp]
;B[qf]
;W[nc]
;B[rd]
;W[qc]
;B[qi]
;W[cj]C[Black to play. What would you do?]
;B[lc]LB[dc:1][rc:A][ce:2]C[Today's episode is a sequel to last weeks episode "a perfect base?". Last week we showed some techniques that can be used against the formation of the three black stones in the top right corner: how white could press down or attack black. 
Today however, we will show that same position from another perspective: how can black pressure white instead? Payback time.

Here you see a snapshot from a game from 2008 where black was played by Gu Li 9p. 
Black makes a very wide extension from his shimari. This move is almost sente, since it threatens to attack at A.
]
(;W[rc]LB[lc:A]C[Gu Li's opponent responded here. In response to Black A, White has several options. This is the most common one. 



]
;B[nb]C[Probe. Main idea: sacrifice the stone and gain strength on the outside.]
(;W[ob]C[Normal response. ]
;B[nd]
(;W[oc]C[The correct move. 
Black usually tenukis now. Or reinforces if the upper side is important.]
;B[mc]C[Gote.])
(;W[od]C[Wrong. ]
;B[mc]
;W[oc]SQ[od]C[Similar position as the previous diagram. But black has sente. 
The marked stone is in an awful position.])
(;W[mb]C[Usually wrong. ]
;B[mc]LB[na:B][oc:A]C[White A or B, but both are normally submissive and good for black. ]
(;W[oc]C[Black can tenuki. ])
(;W[na]
;B[oc]
;W[nb]LB[od:A]C[Black can play A sooner or later. It spoils whites shape and threatens to cut white. ])))
(;W[mb]C[Wrong. Goes back to the other variation. ]
;B[mc]
;W[ob]
;B[nd]LB[na:B][oc:A]C[White A or B again. ]))
(;W[cg]LB[lc:A]C[If White plays tenuki in response to A.]
;B[rc]C[Black takes away whites base. 
What would you do as white? 

]
(;W[rb]C[Wrong. ]
;B[pb]C[The vital shape point!

]
(;W[qb]
;B[oc]
;W[od]
;B[nb]C[White has a weak group. Great for black. ])
(;W[ob]C[A countermeasure. Usually good for black.]
;B[qb]
;W[ra]
;B[pc]
;W[qd]
;B[od]
;W[pe]LB[oc:A][oe:B]C[Black has two options: A or B. 
A is good enough, but B is better when the ladder is good for black. 
]
(;B[oc]
;W[re]
;B[of]LB[oe:A][pf:B]C[Tesuji! This creates a strong wall for black on the outside. He can get A and B in sente. ]
;W[eg]
;B[oe]
;W[sd]
;B[pf]
;W[sc]C[Blacks wall is magnificent. 
])
(;AB[ho]LB[ho:A]C[A breaks the ladder. ]
;B[oe]
;W[pf]
;B[qe]C[White is in trouble. ]
(;W[oc]
;B[pg]C[Ladder. ])
(;W[pg]
;B[oc]C[Black simply connects and kills the entire corner. ]))))
(;W[nf]C[Professional move. Light and flexible. 
])
(;W[pf]C[Another technique seen in professional games. ]
;B[pg]
;W[nf])
(;W[mc]C[A vulgar move. For if you absolutely don't want to run and need to live in the corner. ]
;B[ld]C[Locally a good exchange for black. ]
;W[rb]C[See the episodes bonus tab for a professional game with this position. ])))