(;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[badukmovies]C[Today's topic: The attachment underneath!
]
(;B[qd]C[This is a game between Kang Dongyun 9p playing white and Kim Daeyoung 4p playing black from 2011]
;W[dc]
;B[dp]
;W[pq]
;B[ce]
;W[di]
;B[fe]
;W[ee]
;B[ef]
;W[ed]
;B[cg]
;W[ff]
;B[eg]
;W[gf]
;B[fc]
;W[fd]
;B[ge]
;W[hf]
;B[gd]
;W[gc]
;B[hc]
;W[gb]
;B[ie]
;W[hb]
;B[jc]
;W[if]
;B[je]
;W[ic]
;B[he]
;W[jf]
;B[ib]
;W[hd]
;B[id]
;W[hc]
;B[ke]
;W[lg]
;B[kb]
;W[ia]
;B[jb]
;W[fb]
;B[od]
;W[gi]
;B[bi]
;W[qn]
;B[jp]
;W[hq]
;B[ho]
;W[qc]
;B[rd]
;W[fp]
;B[fo]
;W[me]
;B[md]
;W[io]
;B[ip]
;W[pe]
;B[pd]
;W[eo]
;B[ep]
;W[go]
;B[fn]
;W[gn]
(;B[fq]C[So black has to play atari from side]
;W[gp]
;B[fm]
;W[in]
;B[gm]
;W[hn]
;B[nq]
;W[lq]
;B[po]
;W[qo]
;B[pr]
(;W[qq]
;B[no])
(;W[qr]
;B[pp]
;W[qq]
;B[no]C[Also joseki])
(;W[pp]C[White can also play here for thickness.]
;B[qr]
;W[np]
;B[oq]
;W[op]
;B[lr]
;W[mr]
;B[mq]
;W[mp]
;B[kq]
;W[lp]
;B[nr]
;W[kr]
;B[ms]
;W[jr]C[Black takes territory and seonsu(sente) and white takes thickness.]))
(;B[gp]
;W[hp]
;B[hn]
;W[gm]
;B[fq]
;W[in]C[This is the ladder. A is a wonderful ladder breaker.]
;B[hm]
;W[hl]
;B[im]
;W[jm]
;B[il]
;W[ik]
;B[jl]
;W[kl]
;B[jk]
;W[jj]
;B[kk]
;W[lk]
;B[kj]
;W[ki]
;B[lj]
;W[mj]
;B[li]
;W[lh]
;B[mi]
;W[ni]
;B[mh]
;W[mg]
;B[nh]
;W[oh]
;B[ng]
;W[nf]
;B[og]
;W[pg]
;B[of]
;W[oe]
;B[pf]
;W[qf]))
(;AW[pc][po][nq]AB[qn][qo][lq][pq]C[White to play.]
;W[pr]C[This is the attachment underneath!
]
(;B[qq]
;W[no]C[You know well about this variation.
])
(;B[qr]
;W[pp]
;B[qq]
;W[no]C[This is one of the jeongseoks !
])
(;B[pp]C[Sometimes black plays here if he wants thickness.
]
;W[qr]
;B[np]
;W[oq]
;B[op]
;W[lr]
;B[mr]
;W[mq]
;B[mp]
;W[kq]
;B[lp]
;W[nr]
;B[kr]
;W[ms]
;B[jq]C[White takes territory and seonsu(sente) and black takes thickness.
]))
(;AW[ko][oo][qo][np][kq]AB[pd][mn][mp][mq][pq][lr]C[White to play - remember the attachment underneath tesuji.]
(;W[pr]C[This is the one we should remember.
]
(;B[qq]
;W[oq]C[Black is separated.
])
(;B[qr]
;W[nr]C[The second tesuji!
]
;B[or]
;W[nq])
(;B[or]
;W[qr]
(;B[qq]
;W[oq]C[Black is ruined!
])
(;B[oq]
;W[qq]C[White takes territory in the corner!
]))
(;B[oq]
;W[qq]C[White succeeds!
]))
(;W[nq]C[This is a serious mistake.
]
;B[nr])
(;W[qq]
;B[qr]
;W[rq]
;B[or]C[Not enough for white!
]))
(;AW[pb][qb][qc][nd][pd][ne][qe][lf][mf][qn][eo][dp][pp][bq][cq][eq][oq]AB[ob][kc][nc][oc][pc][md][me][nf][ng][qg][mh][fm][bn][dn][gn][do][bp][cp][hp][gq]C[Black to play. 

Let's start with the lower left.

What about the upper right? It looks like it's a similar problem (added by Kim).]
(;B[dr]C[This is a false vital point!
]
;W[er]
(;B[dq]
;W[ep]
;B[br]
;W[cr]
;B[aq]
;W[ds]
;B[gr]
;W[ar]
;B[as]
;W[bs]C[White makes a ko-fight!
])
(;B[br]C[If black attaches here...
]
;W[ar]
;B[dq]
;W[cr]
;B[ep]
;W[ds]
;B[dp]
;W[fq]
;B[gr]
;W[bs]C[White succeeds!
]))
(;B[er]C[The beneath attachment!
]
(;W[dr]
;B[fr]C[White is dead!
])
(;W[fr]
;B[dr]
;W[fq]
;B[dq]C[White cannot live!
]))
(;B[re]C[Here however, this is wrong. ]
;W[rf]
;B[rd]
;W[qf]
;B[qd]
;W[pe]
;B[rc]
;W[rb]
;B[sb]
;W[se]C[Black is dead. ])
(;B[rd]C[In this case, this IS the vital point!]
;W[re]
;B[pe]C[Then followed up by a beautiful shape move. ]))
(;C[This is from a game that Kim played in the Dutch Championships 2013. His oponent is Willem-Koen Pomstra 5dan and plays black. ]
;B[dp]
;W[pp]
;B[dc]
;W[pd]
;B[nc]
;W[qf]
;B[kd]
;W[cf]
;B[de]
;W[bd]
;B[dh]
;W[df]
;B[ef]
;W[eg]
;B[ff]
;W[dg]
;B[ch]
;W[eh]
;B[dj]
;W[ei]
;B[bc]
;W[dl]
;B[ek]
;W[dn]
;B[gk]
;W[hh]
;B[hf]
;W[fp]
;B[gi]
;W[gh]
;B[ik]
;W[ii]
;B[dq]
;W[eo]
;B[go]
;W[fq]
;B[bo]
;W[bn]
;B[co]
;W[ip]
;B[kk]
;W[fk]
;B[fl]
;W[fj]
;B[el]
;W[gl]
;B[gm]
;W[hl]
;B[hk]
;W[im]
;B[hm]
;W[il]
;B[in]
;W[km]
;B[dm]
;W[em]
;B[cm]
;W[cn]
;B[fm]
;W[en]
;B[kn]
;W[kl]
;B[lk]
;W[ml]
;B[cl]C[White to play (lower left corner).]
;W[dr]C[Tesuji!]
;B[cr]
;W[er]
;B[bq])
(;AW[dd][pd][gm][qn][fo][go][pp][fq][hq][iq][dr][jr]AB[fk][hk][im][cn][dp][ep][hp][ip][jp][cq][kq][kr]C[Black to play. ]
(;B[fr]C[The beneath attachment!
]
(;W[eq]
;B[gp]
(;W[fp]
;B[gq]C[Black succeeds!
])
(;W[gq]
;B[fp]C[Black succeeds!
]))
(;W[er]
;B[gp]
;W[fp]
;B[gq]
;W[gr]
;B[hr]
;W[fs]
;B[ir]C[Black is satisfied with it!
])
(;W[gr]
;B[fp]
;W[gp]
;B[er]C[Black can capture one stone and maybe even the whole group.]))
(;B[gp]C[This is a serious mistake!
]
;W[fp]
(;B[fr]
;W[gr]
;B[gq]
;W[hr]
;B[er]
;W[eq]C[blacks stones are capture, the tesuji comes too late.])
(;B[gq]
;W[gr]
;B[fr]
;W[hr]C[Black's effort becomes effortless.
])))
(;AW[gn][co][ho][cp][fp][ip][jq]AB[cl][cn][dn][do][dq][fq][gq]C[White to play. ]
(;W[cq]C[This move is not working.
]
;B[dr]
(;W[br]C[If white plays here...
]
;B[an]C[This move is the tesuji.
]
(;W[bo]
;B[bs]
;W[cs]
;B[cr]
;W[as]
;B[aq]C[White is dead!
])
(;W[aq]
;B[cr]
;W[ao]
;B[bp]
;W[bo]
;B[bs]C[White is dead!
]))
(;W[cr]C[This dies.]
;B[bo]
;W[bp]
;B[bn]
;W[ar]
;B[bs]
;W[cs]
;B[ap]
;W[aq]
;B[br]))
(;W[dr]C[This is the beneath attachment!
]
(;B[cq]
;W[ep]
(;B[dp]
;W[eq]C[White succeeds!
])
(;B[eq]
;W[dp]C[White succeeds!
]))
(;B[eq]
;W[cq]
(;B[br]
;W[cr]
;B[bo]
;W[ap]C[White is alive!
]
;B[bn]
;W[bs])
(;B[bo]
;W[bp]
;B[br]
;W[cr]
;B[bn]
;W[bs]C[White can live!
]))
(;B[er]
;W[cq]
;B[dp]
;W[cr]
;B[bo]
;W[bp]
;B[bn]
;W[ar]C[White succeeds!
])))
(;AW[cl][dm][co][do][dq][fq][gq][hq]AB[fl][en][eo][go][ho][ep][ip][jq]C[Black to play. ]
(;B[cq]C[This is a false tesuji.
]
;W[dr]C[Black can do nothing.
])
(;B[dp]
;W[cq]
;B[eq]
;W[er]
;B[cp]
;W[bp]C[Black cannot afflict white.
])
(;B[dr]C[The beneath attachment!

]
(;W[eq]
;B[cq]
(;W[bq]
;B[cp]
;W[dp]
;B[bp]
;W[br]
;B[cr]
;W[bs]
;B[bo]
;W[bn]
;B[ar]
;W[ao]
;B[aq]
;W[er]
;B[ds]C[Black is alive!
])
(;W[dp]
;B[bp]C[Black succeeds!
]))
(;W[cq]
;B[eq]C[Black can cut through.
])
(;W[cr]C[If white plays here...
]
;B[cq]C[This move is great!
]
;W[er]
;B[dp]
;W[ds]
;B[cp]C[Black succeeds!
])))
(;AW[ol][ql][no][mq][nq][oq][mr]AB[pc][qe][qn][pp][nr][or][pr]C[White to play. ]
(;W[pq]
;B[qq]
(;W[qr]
;B[rr]
;W[qp]
;B[rq]
;W[po]
;B[rp]C[This is not enough for white.
])
(;W[qp]
;B[rp]
;W[qr]
;B[rq]
;W[ps]
;B[rr]
;W[rs]C[Also this is not enough for white.
]))
(;W[qp]C[This is the beneath attachment.
]
(;B[qo]
;W[pq]
;B[qq]
;W[qr]
;B[rp]
;W[rr]C[White succeeds!
])
(;B[pq]
;W[qo]
;B[po]
;W[rn]
;B[rq]C[White succeeds!
])
(;B[qq]
;W[qo]
;B[po]
(;W[rn]C[White is just fine!
])
(;W[rq]C[This move is much better!
]
(;B[rr]
;W[pq]
;B[qr]
;W[rn]C[White succeeds!
])
(;B[rn]C[If black plays here...
]
;W[pq]
;B[qr]
;W[rp]
(;B[rr]
;W[pn]
;B[on]
;W[pm]
;B[oo]
;W[nn]C[Black is dead!
])
(;B[pm]
;W[rr]
;B[rs]
;W[ns]C[White wins a capturing race!
]))
(;B[pq]C[Black should connect here.
]
;W[rn]
;B[rr]
;W[rp]
;B[sr]C[This is the best thing black can do.
]))))))
