(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[백 Cho Hye Yeon 9p]
;B[pd]
;W[dd]
;B[qp]
;W[dp]
;B[oq]
;W[qf]
;B[nc]
;W[rd]
(;B[qg]C[Today's topic is Black's attachment! 
]
;W[pg]
;B[qh]
;W[pf]
;B[qc]C[The story begins.
]
(;W[ph]
;B[qj]
;W[qi]
;B[ri]
;W[pi]
(;B[pj]C[This is a contemporary jeongsuk(joseki).
]
(;W[rj]
;B[rk]
;W[rh]
;B[sj]
;W[rf]C[Good for black. Black has sente and is more powerful than in the next variation we will see.])
(;W[rh]C[This is the right direction.
]
;B[rg]
;W[sh]C[This move is good because it takes away eye shape of black
]
(;B[sg]
;W[rj]
;B[si]
;W[rk]
;B[ql]
;W[rl]
;B[qm]
;W[rf]
;B[rm]
;W[sj]C[White wins a race to capture! 

])
(;B[rk]
(;W[rf]
(;B[fq]
;W[cn]
;B[jp]C[This is the new form of the contemporary opening.
]
;W[lc]
;B[fc]
;W[ic]
;B[cc]
;W[dc]
;B[cd]
;W[de]
;B[db]
;W[eb]
;B[cb]
;W[ec]
;B[cf]
;W[rb])
(;B[fc]
;W[cf]
;B[fq]
;W[dn]
;B[jp]LB[fc:A][cf:B]
;W[lc]
;B[ic]LB[lc:A]SQ[nc][qc][pd]C[A is weaker now and that also means the marked group is stronger.]
;W[rb]C[White attacks the corner with this weird jump. Appreciate it!]
;B[rc]
;W[sc]
;B[qb]C[This is a modern sequence. A difficult situation! 
]))
(;W[si]C[White's dansoo(the marked stone) is not recommended. ]
;B[fq]
;W[cn]
;B[jp]C[Later on, the aji(bad potential)of ko in the right side will show up. ]
;W[fc]
;B[sj]C[Big aji here])))
(;W[oj]
;B[ok]
(;W[nj]
;B[nk]
;W[mk]
;B[rk]
;W[lj]C[This is also a jeongsuk.
])
(;W[pk]
;B[rk]
;W[pl]
;B[nj]
;W[oi]
;B[rf]
;W[re]
;B[rg]C[Black seems good, but...]
;W[oo]C[If you are a fierce fighter, you can consider this diagram.
]))
(;W[jq]C[If white plays here...
]
;B[oj]C[This move is worthwhile! The idea is that white can't cut anymore.
]
(;W[rh]
;B[rg]
;W[sh]
;B[sg]
;W[rj]
;B[si]
;W[rk]
;B[ql]
;W[rl]
;B[rm]
;W[rf]
;B[qk]C[White's strategy is not working! 

])
(;W[rj]
;B[rk]
;W[rh]
;B[sj]
(;W[rf]LB[rg:A]C[Black is satisfied with it! 
Appreciate this move, it is so much better than playing at A
]
(;B[sh]C[Note also that white has a nice answer to this atari]
;W[sg]C[Black can't capture - snapback])
(;B[rc]LB[rd:A]C[Now this move does not treaten to capture the stone at A anymore]))
(;W[rg]
;B[rc]LB[re:A]C[After this black endgame move he has a followup at A to capture a stone.]))))
(;B[rf]C[This hane is not good]
;W[rj]
;B[rh]
;W[qk]
;B[re]
;W[fq]C[Look at white's dominant force! 
]))
(;W[pi]C[If white plays here...
]
;B[qj]
;W[qi]
;B[ri]
(;W[ph]
;B[pj]C[Same thing happens, but...
])
(;W[pj]C[White can also choose to play here instead]
;B[qk]
;W[rj]C[This is another jeongsuk(joseki).
]
(;B[rk]C[If black captures one stone...
]
;W[rh]
;B[sj]
;W[rg]C[White is very happy!!
])
(;B[rh]C[Black has to connect here.
]
;W[rk]C[White has to play here, and then...
]
(;B[ql]
;W[rl]
;B[qm]
;W[rm]
;B[rn]C[Black wins a race to capture by one move. 
]
(;W[rf]
;B[sm]
;W[ph]
;B[sl]C[Black captures white stones.
])
(;W[pn]C[White plays here. What does that mean? This is very interesting. I want you to remember it.
]
;B[qn]C[Black should connect here.
]
;W[ph]
;B[rf]
;W[sg]C[White's strategy!
]
(;B[rg]
;W[re]
;B[sm]
;W[sf]C[Black dies! 
])
(;B[re]C[Black has to play here to save himself! 
]
;W[qe]
;B[rg]
;W[qd]
;B[sm]
;W[lc]LB[pn:A][qn:B]C[Even though black captures four white stones, white is ahead due to the influence. Please take notice of the meaning of Q-6. It is an advantage.

Why was A for B a good exchange? White gets a free move at the outside that he can use for aji or a ladder breaker. Blacks stone at B does not influence the position. Black was already strong.])))
(;B[rf]
;W[re]
;B[ph]
;W[oh]C[This is very complicated, but we will dive into it later])))))
(;B[qh]C[Last week we saw this.]))