(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[baduk]PB[movies]
;B[pd]
;W[qf]
;B[nc]
;W[rd]
(;AB[pp]
;B[qg]SQ[pp]C[In professional games this move is popular. Usually played with another stone in the nearby corner (like the marked stone).
We will focus on the endposition of one of the following josekis: there is magic in the corner. 

White has 2 main answers.


]
(;W[rg]
;B[rf]LB[re:2][pg:1]C[Probe, leaving white 2 choices. 1 requires a favorable ladder for white and leads us to some corner magic. 2 is straightforward.]
(;W[pg]
;B[qh]
;W[rh]
;B[qe]
;W[pf]
;B[re]TR[rd]C[Black takes the corner, but we will see that there is still aji left in the marked white stone.]
;W[qi]C[The ladder.]
;B[dp]C[Black plays a ladder breaker.]
(;W[oj]C[The usual joseki move.]
;B[cn]LB[rd:A]C[Black gets sente again. The result looks way too good for black, so why is this joseki?
The answer is found in the white stone at A. It looks dead, but it isn't!]
;W[qc]C[As so often, the san-san is the vital point in the corner. 
Black can try several things in order to attack whites 2 stones, but none of them work. 
]
(;B[pc]
;W[rb]C[The vital point!]
(;B[pb]
;W[sc]LB[qd:A]C[A is always sente so white is alive!
We attach a progame in the bonus tab, where this position occurs.]
;B[qb]
;W[qd]
;B[pe]
;W[ra])
(;B[sc]C[Desperate attempt to kill white.]
;W[pb]
;B[ob]
;W[qa]
;B[sb]
;W[sd]
;B[oa]
(;W[sa]C[Tesuji.]
;B[ra]
;W[rc]
;B[pa]
;W[qb]C[White is alive.])
(;W[pa]C[A mistake. ]
;B[ra]C[Ko for the corner. ])))
(;B[pb]
;W[pc]C[Pushing through is crucial.
]
;B[oc]
;W[qb]
;B[ob]
;W[sc]C[Vital point!]
(;B[rb]
;W[ra]
;B[sb]
;W[pe]
;B[qd]
;W[od]LB[sc:A]C[Because of the vital move at A, white can cut!])
(;B[ra]
;W[pe]C[Same idea. ]))
(;B[ob]C[The most severe killing attempt of the three. But this severe attack will also create a very severe and beautiful counter tesuji.]
;W[rb]C[Proper shape once again.]
;B[sc]
;W[pb]
;B[sd]
;W[sb]
;B[qa]
;W[pa]
;B[ra]
;W[od]C[The first tesuji.]
(;B[oe]
;W[pe]
;B[qd]
;W[pc]
;B[oc]
;W[rc]
;B[nd]
;W[sf]C[Tesuji number 2! Black has a lack of liberties and whites corner group is connected to the rest. ])
(;B[pc]C[This also fails. ]
;W[oc]
;B[oe]
;W[pe]
;B[qd]
;W[nd]
;B[rc]
;W[nb]
;B[qb]
;W[oa]C[Fantastic for white. ])))
(;W[qk]C[A tricky alternative. ]
;B[ph]C[Black can not escape.]
;W[oh]
;B[pi]
;W[oj]
;B[qj]
;W[pj]
;B[ri]
;W[oi]
;B[qi]
;W[rj]))
(;W[re]
;B[pf]
;W[sf]
;B[qh]
;W[qc]C[Territory for white versus influence for black.]))
(;W[pg]C[The most common answer.]
;B[qh]C[The only move. After this move, White has several options.

1 is the oldest and most common variation.
2 and 3 are new ideas and developed from recent pro-study.]
(;W[ph]
;B[rf]
;W[qe]
(;B[qj]C[Normal joseki, fast. ]
(;W[pi]C[Only move.]
;B[qk]
;W[qc]C[White needs a base and plays on san-san.]
(;B[pc]C[Old variation.]
(;W[re]
;B[kc]C[The end of the most basic josek
i.

])
(;W[dp]C[Mistake.]
;B[qd]
;W[re]
;B[rc]C[Good for black. ]))
(;B[kc]LB[pc:A][re:B]C[Nowadays pro players like to wait with the exchange of black A for white B. ]
;W[dp]
;B[re]C[The reason is that black can later choose to play here instead. ]
;W[qd]
;B[pc]LB[pf:A]C[This can be a strong attack if black is already strong in the centre. 
White has a cutting point at A and is not alive in the corner yet.]))
(;W[dd]C[A big mistake.]
;B[pi]C[Black will not think twice and make a tigersmouth shape.]))
(;B[qi]C[Also possible, but slower. ]))
(;W[pf]C[Black can take the corner, or the right side. ]
(;B[qc]C[Most popular. White can pressure the right side in several ways. 

See Bonus-tab for some progames with variations on this play. ]
(;W[pi]
(;B[qj]C[Correct.]
;W[qi]
;B[ri]C[We will show only 2 variations of many. ]
(;W[pj]
;B[qk]
;W[rj]
;B[rh]C[A complicated fight.]
;W[rk]
;B[ph]
;W[oh]
;B[rf]
;W[re]
;B[og]
;W[ni]
;B[sg]
;W[si]
;B[of]
;W[qe]
;B[rc]
;W[sd]
;B[pe]
;W[ql]C[There is still a huge ko. See bonus tab for sgf file. ])
(;W[ph]LB[rf:A][pj:B]C[Black can tenuki or think about A or B]))
(;B[qi]C[Dubious.]
;W[qj]
(;B[rj]
;W[ph]C[White gets thickness.])
(;B[ph]C[White is in control. ]
;W[oh]
;B[rj]
;W[pj]
;B[rk]
;W[rg]
;B[rh]
;W[sh]
;B[ri]
;W[re]
;B[qn]
;W[lc]C[White is 1 step ahead. ])))
(;W[ph])
(;W[pj]
;B[qj]
;W[pi]
;B[qk]
;W[qi]
;B[ri]
;W[rj]
;B[rh]C[This leads to the same ko situation from before. ]))
(;B[ph]
;W[qc]
;B[kc]))
(;W[rf]
(;B[qc]
;W[ph]
;B[qi]
;W[pi]
;B[qj]
(;W[pe]
;B[pj])
(;AW[pp]C[If there is a white stone in the lower corner, white can think about attacking. ]
;W[qm]
;B[pj]
;W[pe]))
(;B[ph]C[Straightforward.]
;W[qc]
;B[og]
;W[pf]
;B[kc]))))
(;B[qc]C[If black simply responds, we return to the 'perfect base'  position from episodes 4 and 5.]
;W[qi]))