(;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[dd]
;B[qp]
;W[dp]
;B[oq]
;W[qf]
;B[nc]
;W[rd]
;B[fc]
;W[cf]
;B[qh]
;W[qc]
;B[qe]
;W[re]
;B[pf]
;W[pg]
;B[qg]
;W[rf]
;B[og]
(;W[hc]
(;B[ge]LB[id:B][fe:A]SQ[nc][pd][qe][pf][og][qg][qh]C[Today's topic! 

Black pressures white's stone at the top more than if he would simply play at A.
Black wants to push white to his strong marked group, so that he can make use of his thickness. It's a good strategy to use thickness for fighting instead of trying to make territory with it.
Black aims at the follow-up at B to press white down.]
(;W[ec]
;B[gc]
;W[hd]
;B[he]
(;W[ie]
;B[if]
;W[je]
;B[ee]C[Black is active and good! 
])
(;W[jd]
;B[ie]
;W[lc]
;B[ee]C[Black feels great! 
]))
(;W[he]C[If white attaches here black feels good.
]
;B[hf]
;W[ie]
;B[gf]C[Black prevails! 
]
;W[if]
;B[ig]
;W[jg]
;B[ih]
;W[jh]
;B[ji]
;W[ii]
;B[gd]C[Black can fight! 
])
(;W[kc]C[Not good.
]
;B[id]
;W[ic]
;B[jd]
;W[lb]
;B[kd]
;W[ld]
;B[le]
;W[md]
;B[me]C[White is terrified by black's thickness! 
])
(;W[jd]LB[lc:B][jf:A]C[This move is considered to be a right response. 

It is a very careful move. Now white can either escape with A or make a solid base with B.
]
(;B[jf]
;W[lc]C[White is just fine.
])
(;B[de]C[This move appeared in the modern era.
]
(;W[ee]C[If white plays here...
]
;B[ed]
;W[df]
;B[dc]
;W[ce]
;B[cc]
;W[fd]
;B[ec]
;W[gd]
;B[cl]C[Black takes territory as well as sente(seonsu in Korean). But white is thick.
]
;W[cj]
;B[bj]
;W[bi]
;B[bo]
;W[cq]
;B[bk]
;W[di]
;B[dn]
;W[gq]C[This is possible for both sides.
])
(;W[ce]C[If white responds here...
]
;B[dc]C[Black wants to attach here in combination with the previous attachment.
]
(;W[ed]
;B[ec]
;W[cc]
;B[fd]
(;W[ee]
;B[cb]
;W[bc]
;B[ie]C[White is also fine. And then we can expect a difficult fight.
]
;W[je]
;B[jf]
;W[kf]
;B[kg]
;W[if]
;B[jg]
;W[he]
;B[hf]
;W[id]
;B[ig]
;W[lc]C[A difficult fight!
])
(;W[cd]C[It is also possible for white to connect here.
This is a great move.
]
;B[cb]C[When black now plays hane, white can simply block.]
;W[bb]))
(;W[cc]
;B[ed]
;W[cd]
;B[jf]C[White's 3.3 is very strange.
]))
(;W[ed]
;B[ce]
;W[cd]
;B[bd]
;W[bc]
;B[bf]
;W[fd]
;B[ci]C[This is one of the diagrams we can expect. Black is not bad.
])))
(;W[fd]C[If white attaches here...this is ok for both.
This hits black at the weak spot in his keima shape.
]
;B[gd]
;W[gc]
;B[ed]
;W[fe]
;B[ee]
;W[ff]
;B[ec]C[It is possible for black to play in this way.
]
;W[ef]
;B[de]
;W[ce]
;B[cd]
;W[bd]
;B[cc]
;W[bc]
;B[df]
;W[dg]
;B[cb]
;W[ch]
;B[ie]C[Black can fight! 
])
(;W[dc]C[If white secures the corner like this we get a devision between solid territory for white and influence for black.
]
;B[id]
;W[ic]
;B[jd]
;W[jc]
;B[kd]
;W[fd]
;B[pj]C[White's territory vs. black's moyo.
])
(;W[id]C[If white responds here..
]
;B[ie]
;W[je]
;B[if]
;W[jf]
;B[jg]
;W[ig]
;B[gg]
;W[ih]
;B[kg]
;W[kd]
;B[gc]C[Black can deal with it!
])
(;AE[ge]
(;B[ge])
(;B[fe])))
(;B[cn]
;W[cl]
;B[em]LB[fq:A]C[This move is similar, and can also be played, although it is very uncommon. Here white has no stone yet at A however.])
(;B[db])
(;B[fe]))
(;W[id]C[This move is not common.
]
;B[fe]
;W[if]
;B[fg]
;W[di]C[A difficult opening.
])
(;W[gd]C[If you are a fierce fighter, you can consider this move.
]
(;B[fd]
(;W[ge]
;B[fe]
;W[gf]
;B[ff]
;W[gg]
;B[fg]
;W[gh]
;B[eb]
;W[cb]
;B[ic]C[A difficult fight!
])
(;W[fe]C[If white attaches here...
]
;B[ge]
;W[hd]
;B[dc]
;W[cc]
;B[ee]
;W[ff]
;B[ed]
;W[cd]C[Wow, this is a fierce battle!
]
(;B[ef]
;W[fg]
;B[eg]
;W[fh]
;B[cg]
;W[bg]
;B[ch]
;W[bh]
;B[cj]C[One of the openings
])
(;B[de]C[This move is also powerful.
]
(;W[ce]
;B[dg]
;W[hf]
;B[fg]C[The battle is favorable to black! That is...
])
(;W[bg]C[White should reply with a diagnol move.
]
;B[he]
;W[id]
;B[ie]
;W[jd]
;B[je]
;W[ef]
;B[kd]
;W[gb]C[We just appreciate the sequence what happens next. 
]
;B[gc]
;W[hc]
;B[fb]
;W[hb]
;B[jc]
;W[kc]
;B[kb]
;W[lc]
;B[ib]
;W[ke]
;B[ld]
;W[jf]
;B[kf]
;W[le]
;B[md]
;W[lf]
;B[ig]
;W[lb]
;B[ha]
;W[ga]
;B[ia]C[White is in trouble.
]))))
(;B[dc]C[If black attaches here...
]
(;W[cc]
;B[ed]
;W[db]
;B[de]
;W[ec]
;B[eb]
;W[dc]
;B[fd]
;W[ce]
;B[ge]C[Black is not bad.
])
(;W[fd]
;B[cd]
;W[ec]
(;B[eb]
;W[ed]
;B[cb]
;W[ce]
;B[bd]
;W[fb]C[White is a bit better than black.
])
(;B[de]
;W[ed]
;B[ce]
;W[cc]
;B[bc]
;W[db]
;B[cg]C[Another form of jeongsuk(joseki). 
])))))
