(;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]PB[흑 my friends 2dan]
(;AW[cn][co][cp][ip][cq][fq][iq]AB[do][fo][ho][io][jo][dp][hp][kq]C[Today's topic: Strong Heongma ]
(;W[fr]C[This move is the one we are going to examine.
])
(;W[gr]
;B[er]C[White's failure.
]
;W[eq]
;B[dq]
;W[dr]
;B[cr])
(;W[er]
;B[gr]C[Diagonal move is not right.
]
;W[gq]
;B[hq]
;W[hr]
;B[ir]))
(;B[cp]C[Start of a joseki.]
;W[ep]
;B[eq]
;W[fq]
;B[dq]
;W[gp]
;B[fo]
;W[go]
;B[fr]
;W[gr]
;B[fp]
;W[gq]
;B[fn]
;W[gm]
;B[fm]
;W[fl]
;B[el]
;W[fk]
;B[gn]
;W[hn]
;B[hm]
;W[gl]
;B[in]
;W[ho]LB[em:A]C[This is all a variation of one jeongseok(joseki).
]
;B[dl]C[This is the tesuji.
]
;W[dj]C[This is the right sequence of jeongseok. Later...
]
;B[pp]
;W[cl]
;B[cm]
;W[ck]
;B[bm]C[White's influence vs. Black's territory
])
(;B[pd]
(;W[dd]
;B[qp]
;W[dq]
;B[oq]C[This is the official match betwwen Kato Masao(Black) and Cho Chi-kun 9p.
In Meijin, 1986
]
;W[qj]
;B[ql]
;W[qg]
;B[qe]
;W[mc]
;B[oc]
;W[jc]
;B[co]
;W[dl]
;B[dn]
;W[fp]
;B[bq]
;W[jq]
;B[cf]
;W[ch]
;B[cc]
;W[cd]
;B[dc]
;W[ed]
;B[bd]
;W[be]
;B[bc]
;W[ce]
;B[fc]
;W[cm]
;B[lq]C[White to play.
]
;W[dp]C[This is the right move.
]
;B[cr]
;W[bp]
;B[cp]
;W[cq]
;B[bo]
;W[br]
;B[ap]
;W[ar]
;B[el]
;W[dk]
;B[em]
;W[fj]C[This is the sequence of the real match - white succeeds.
])
(;W[dp]
;B[qp]
;W[dd]
;B[fq]
;W[cn]
;B[lq]C[This is the micro Chinese opening (mini mini Chinese I coined the term five years ago!) 
]
;W[qj]
;B[qf]
;W[qm]
;B[pn]
;W[qn]
;B[qo]
;W[ol]C[This is the problem.
]
;B[on]C[This is the strong heongma.
]
(;W[oj]
;B[lo]C[Black is satisfied with it.
])
(;W[ip]
;B[pk]C[This is keen!
])))
(;AW[co][bp][cq][dq][eq][fq][gq][hq]AB[in][io][ip][bq][iq][br][ir][fs]C[Black to play.]
(;B[es]C[This is the right move!
])
(;B[ds]C[This is a false answer!
]
;W[gs]
;B[gr]
;W[hr]
;B[hs]
;W[fr]
;B[gs]
;W[es]
;B[er]
;W[dr]C[Black cannot save two stones in the corner.
]))
(;B[co]C[Another variation, this time from the taisha joseki!]
;W[dq]
;B[fp]
;W[do]
;B[dp]
;W[ep]
;B[cp]
;W[eq]
;B[eo]
;W[dn]
;B[cq]
;W[fq]
;B[gp]
;W[hr]
;B[cn]
;W[en]
;B[fo]
;W[fn]C[This is a jeongseok of Taisha.
Black's next move is...
]
(;B[hp]C[This is the strong Heongma.
]
;W[iq]
;B[gr]
(;W[fr]
;B[gn]
;W[gm]
;B[hn]
;W[el]C[This is the right sequence of jeongseok.
])
(;W[gq]C[White can not play like this]
;B[hq]
;W[fr]
;B[ir]
;W[gs]
;B[jq]))
(;B[gn]C[If black plays the hane here...
]
;W[gm]
;B[hn]
;W[hp]C[This is the vital point.
]))
(;B[ep]C[Another joseki variation, starting with 5-4]
;W[cp]
;B[dn]
;W[eq]
;B[dq]
;W[dp]
;B[cq]
;W[bq]
;B[br]
;W[bp]
;B[er]
;W[fq]
;B[fr]
;W[gq]
;B[eo]
;W[ar]
;B[cr]
;W[cm]
;B[dl]
;W[iq]
;B[gr]
;W[hr]
;B[gs]C[This is one of the jeongseoks of Gomoku.
]
;W[cn]
;B[cl]
;W[bl]
;B[bk]
;W[dm]
;B[em]
;W[el]
;B[bm]C[This is a tricky overplay by black]
;W[bn]
;B[al]
;W[fm]
;B[en]
;W[gn]
;B[gp]C[This is the problem.
]
(;W[hp]C[If white responds here...
]
;B[fp]
;W[hq]
;B[fl]
;W[ek]
;B[gm]
;W[fn]
;B[hn]
;W[hm]
;B[ho]
;W[gl]
;B[go]C[White in the left is automatically dead.
])
(;W[ho]
;B[go]
;W[hp]
;B[fl]
;W[ek]
;B[gm]C[White cannot capture black.
])
(;W[hn]C[This is the strong heongma.
]
(;B[go]
;W[hp]
;B[ho]
;W[io]C[Black cannot escape.
])
(;B[ip]C[If white attaches here...
]
;W[hq]
;B[go]
;W[io]
;B[hp]
;W[jp]
;B[jq]
;W[jr]
(;B[jo]
;W[kq]
;B[fl]
;W[ek]
;B[fk]
;W[ej]
;B[in]
;W[fp]
;B[fo]
;W[ho]
;B[gm]
;W[do]C[A very long sequence, and white wins! 
])
(;B[kq]
;W[kr]
;B[lq]
;W[jo]
;B[lr]
;W[fp]
;B[fo]
;W[ir]C[White wins a capturing race by one move.
]))
(;B[fp]
;W[hq]
;B[an]
;W[hp]
;B[bo]
;W[co]
;B[ao]
;W[go]
;B[ap]
;W[fn]C[Black is dead!!
])))
(;B[pp]
(;W[nq]
;B[qm]
;W[qq]
;B[pq]
;W[qp]
;B[po]
;W[qo]
;B[qn]
;W[pr]
;B[or]
;W[qr]
;B[oq]
;W[no]
;B[nn]
;W[mo]C[This is one of the jeongseoks in the corner.
]
;B[nm]C[This is the right move, a strong heongma.
])
(;W[pd]
;B[qm]
;W[nc]
;B[kq]
;W[pq]
;B[qq]
;W[oq]
;B[qr]C[At this point...
]
;W[no]C[White plays the knight's move.
]
(;B[po]C[A strong heongma and the right move.
])
(;B[]
;W[po]
;B[qo]
;W[pn]))))
