(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[Park Junghwan]PB[Cheon Yaoye ]C[2013 Chinese A-League Round 21

2013-11-23

B: Cheon Yaoye
W: Park Junghwan]
;B[qd]
;W[dd]
;B[pq]
;W[dq]
;B[nc]C[Cheon Yaoye's way of playing
]
(;W[qn]C[This move is more popular than the previous approach these days 
]
;B[qp]
;W[pj]C[the sequence of the actual match
]
;B[qh]
(;W[op]C[Incredible! Park Junghwan's challenge
]
;B[oq]
;W[mp]
(;B[do]C[So black plays tenuki]
;W[co]
;B[cn]
;W[cp]
;B[cf]
;W[di]
;B[dm]
(;W[fp]LB[nq:A]SQ[dm][cn][do]C[A becomes a big move and black is still weak on the left side.]
;B[fc]
(;W[ef]C[White did not choose the attachment with following reasons.
]
(;B[cd]
;W[cc]
;B[dc]
(;W[ec]
(;B[ed]C[That was why black chose to play here.
]
;W[db]
;B[de]
;W[dc]
;B[ee]
;W[fd]
;B[fb]
;W[fe]
;B[ic]
;W[dg]
;B[ff]
;W[gf]
;B[fg]C[A difficult fight appeared in the game.
In the end white resigned.
]
;W[gg]
;B[fh]
;W[gh]
;B[fi]
;W[df]
;B[ce]
;W[cg]
;B[bc]
;W[bb]
;B[ad]
;W[bf]
;B[be]
;W[af]
;B[ae]
;W[bh]
;B[ab]
(;W[hd]C[This is a natural move. White needs to prevent the cut.
]
(;B[gi]C[A good point.
]
(;W[ba]
;B[id]C[again a good point for black
]
;W[ie]
;B[je]
;W[aa]LB[id:B][gi:A]C[White has a great burden in the corner.
Black already profited at A and B, while white still has to win the ko to gain anything here.
]
;B[eq]C[A way of making a bigger ko threat
]
;W[ep]
;B[eb]
;W[ac]
;B[dp]
;W[cq]
;B[ab]
;W[ea]
;B[fq]C[Black again tries to make the ko threats bigger. White can not fight back severely, because this wil give black more and bigger ko threats.]
;W[gp]
;B[ca]
;W[ac]
;B[dr]
;W[bd]C[White needs to take, he has no good ko threats]
;B[cr]
;W[bn]
;B[bm]
;W[br]
;B[bo]
;W[bp]
;B[an]
;W[aq]
;B[gq]
;W[hp]
;B[hq]C[Black feels good.
]
;W[ip]
;B[bs]
;W[er]
;B[fr]
;W[as]
;B[ar]
;W[eo]
;B[dn]
;W[as]
;B[jq]
;W[cs]
;B[es]LB[ap:A]C[Still, there is aji to start a ko at A.
]
;W[jp]
;B[kq]
;W[kp]
;B[gm]
;W[oh]C[A good point to limit blacks moyo
]
;B[no]C[This move forces white to connect one stone.
]
;W[qf]C[But white resists! He is behind and trying to fight.]
;B[pg]
;W[pd]
;B[pc]
;W[pe]
;B[od]
;W[og]
;B[oe]C[Good strategic movements~!
]
(;W[qc]
;B[rc]
(;W[qg]
;B[re]C[Ouch! White is in pain.
]
;W[ph]C[White needs to take gote]
;B[np]SQ[ip][kp][mp]C[Black ended in sente. This is huge. The marked stones are weak now]
;W[il]C[White needs to run.]
;B[in]
;W[hn]
;B[hm]
;W[im]
;B[jn]
;W[mo]
;B[gn]
;W[nn]
;B[on]
;W[om]
;B[mn]
;W[nm]
(;B[lo]C[What it means is...
]
;W[lp]
(;B[lm]C[Black chose this move however

]
;W[ho]
;B[kl]
;W[fm]C[W's challenge
]
(;B[gk]
;W[jk]
;B[kj]
;W[ji]
;B[ki]
;W[jh]
(;B[kk]C[This move is the only move.
]
;W[kh]
;B[jm]C[Black tries to make two eyes.
]
;W[fl]
;B[ik]
;W[hk]
;B[ij]
;W[hl]
;B[gl]
;W[hj]
;B[ek]
;W[jl]
;B[jj]
;W[hi]C[A difficult fight but it is not hard to read for the players.
Both black and white read 30 moves ahead.
]
;B[gj]
;W[li]
;B[lh]
(;W[lg]C[This move is a natural move..
]
;B[mh]
;W[mi]
;B[ii]
;W[hh]
;B[ih]
;W[jf]
(;B[kn]
;W[lq]
;B[nr]C[Black captures white with eye vs. no eye situation.

]
(;W[ig]
;B[mj]C[The actual game
]
(;W[kr]
;B[iq]C[White resigned at this point.
])
(;W[ni]
;B[ml]C[Black is alive!
]))
(;W[ml]
;B[ig]
;W[if]
;B[ll]
;W[lr]
;B[iq]
;W[lj]
;B[en]
;W[mm]
;B[ln]
;W[lk]
;B[fo]
;W[jg]
;B[kr]
;W[hg]
;B[mr]C[White is dead.
]
;W[ls]
;B[ks]
;W[ko]
;B[ms]
;W[jo]
;B[mq]))
(;B[hf]C[This move doesn't work now.
]
;W[he]
;B[hg]
;W[ge]LB[jg:B][lg:A]C[After white A tthe black wedge at B does not work
]))
(;W[mi]C[Not possible]
;B[ii]
;W[hh]
;B[ih]
(;W[ig]
;B[jg]
;W[kg]
;B[jf]
;W[lg]
;B[if]C[White is in despair.
])
(;W[jf]
;B[hf]C[Brilliant!!
]
(;W[ge]
;B[jg]
;W[kg]
;B[kf]
;W[ig]
;B[lg]
;W[jg]
;B[hg]C[Black's success
])
(;W[if]
;B[ge]C[Ruined
])
(;W[he]
;B[hg]
;W[ge]
;B[jg]
;W[kg]
;B[kf]
;W[ig]
;B[lg]C[White's failure
])
(;W[ig]
;B[hg]
;W[ge]
;B[kg]
;W[jg]
;B[kf]C[Again black wins]))))
(;B[kh]C[If black pushes here...
]
;W[kk]
;B[lk]
;W[lj]C[White will cut like this.
]
;B[mj]
;W[li]
(;B[mh]
;W[mk]
;B[ml]
;W[ll]C[Black is in crisis.
])
(;B[kg]
;W[mk]
;B[ll]
;W[mi]
;B[jj]
;W[ij]
;B[hi]
;W[ii]
;B[ig]
;W[jg]
;B[jf]
;W[hh]C[Black fails to attack white.
])))
(;B[fn]C[Black could cut]
;W[en]
;B[em]
;W[fl]
;B[hk]
;W[ik]LB[hk:2][kl:1]C[White can use his two cutting stones to create a complicated situation. The two black groups both have to survive.]))
(;B[ln]
;W[ho]
;B[kl]C[White is in danger.
]))
(;B[ln]
;W[kn]C[Tesuji!]
(;B[ko]
;W[km]
;B[lo]
;W[jo]LB[jn:A][lo:B]C[White wedges like this and either captures A or B
])
(;B[km]
;W[ko]
;B[ll]
;W[jm]LB[ll:A][ho:B]C[Things become complicated. Which is what white wants. Attacking A or connecting at B becomes miai.
])))
(;W[qb]C[This move doesn't work.
]
;B[pf]
;W[qe]
;B[rd]
;W[qg]
;B[rh]C[White is killed.
]))
(;W[pf]C[White can not block here]
;B[qk]
;W[qj]
;B[pk]SQ[qn][kp][mp][op]C[Black uses the sacrificing strategy and aims at the whole lower side.
]))
(;W[id]C[I think white should have pushed here.
]
;B[jc]
;W[jd]
;B[kc]
;W[ba]C[This seems much better than the real game.
]))
(;B[ba]C[Black could try and capture, but it is not so good.]
;W[ca]
;B[cb]
;W[gi]C[Black shouldn't start a ko fight. White has many threats here
]
;B[fj]
;W[bb]
;B[eq]
;W[ep]
;B[cb]
;W[gj]
;B[fk]
;W[bb]
;B[dp]
;W[cq]
;B[cb]
;W[gk]C[White can continue pushing. White gains strength while doing good ko threats]))
(;W[ba]C[It is not good for white to try and capture immediately]
;B[ge]
;W[gd]
;B[he]
;W[hd]
;B[ie]
;W[aa]
;B[id]
;W[ac]
;B[eq]C[A great ko threat
]
;W[bd]
;B[ep]C[Black is much better.
]))
(;B[db]
;W[ce]
(;B[de]
;W[bd]
;B[ed]
;W[cd]
;B[ee]
;W[df]
;B[ff]
;W[cg]
;B[ge]
;W[fm]C[White is better than black.
])
(;B[bd]
;W[ed]
;B[be]
;W[eb]
;B[cb]
;W[fm]C[Good for white])))
(;W[ce]SQ[nc][qd]C[The reason white didn't play here in this game is related to the upper right corner
]
(;B[de]C[First of all black can not play like this. It is a mistake]
;W[bd]
;B[ed]
;W[cd]
;B[ee]
;W[df]
;B[ff]
;W[cg]C[White is better.
])
(;B[bd]C[Black has to extend here]
(;W[ec]C[Not good for white]
;B[ed]
(;W[db]
;B[de]
;W[dc]
;B[ee]C[White is ruined.
])
(;W[de]
;B[eb]
;W[be]
;B[bc]C[It doesn't make any sense for white.
]))
(;W[de]
;B[be]
;W[ec]
;B[db]
;W[cg]
(;B[bf]
;W[eb]
;B[cb]
;W[fd]
;B[gn]SQ[nc][qd]C[Black secures a lot of territory. With the two strong marked stones in place the thickness white builds is difficult to use. If the upper right would be white it would be playable. See the recent kisei final in the bonus tab.
])
(;B[eb]C[Not good]
;W[bf]
;B[bc]C[Good for white]
;W[fm])))))
(;B[cc]C[Also possible]
;W[cd]
;B[dc]
;W[ed]
;B[bc]C[Black gains territory but white gets sente]
;W[fm]C[And attacks the lower right]))
(;W[df]C[What black wants is...
]
;B[dg]
;W[ef]
;B[ce]
;W[cd]
;B[eg]
;W[fd]
;B[gd]
;W[fg]
;B[ed]
;W[de]
;B[ch]
(;W[fe]
;B[fh]
;W[gg]
;B[ei]
;W[gc]
;B[gn]C[Black wants to play like this. Black seems active.
])
(;W[fh]
;B[cj]
;W[fe]
;B[ic]C[Black is not bad at all.
]))
(;W[fd]LB[fc:A][cf:B]C[Perhaps you have heard about the idea that you should attach to the strong side (A) in order to attack the weak side (B). However this case is an exception]
;B[gd]
;W[fe]
;B[cc]
(;W[ec]
;B[cd]
;W[gc]
;B[gn]SQ[di]C[Black is fine. The white marked stone is in a strange position.
])
(;W[cd]C[Blocking on this side is not good either]
;B[dc]
;W[ec]
;B[eb]
;W[ed]
;B[gb]C[Black gains a lot of territory. Blacks upper side works better together than white's left side.])))
(;W[fc]
;B[fp]C[Black feels good when he plays here.
]))
(;B[np]C[This would be the normal idea, but it only helps white in this case]
;W[no]
;B[nq]
;W[mo]C[White became stronger on his weak right side and it is hard to find a good move for black in this area.]
;B[pn]C[This cut for example is too much]
;W[po]
;B[qo]
;W[qm]C[White can fight]))
(;W[on]C[In many cases white plays here.
]
(;B[pm]C[Black can play here.
]
(;W[qm]
;B[co]LB[pn:A]C[It is also possible to think of. Black created aji at A
])
(;W[pn]
;B[mq]
(;W[ck]
;B[qk]
(;W[pk]
;B[qj]
;W[pi]
;B[qi]
;W[pl]
;B[og]C[Black is not bad.
])
(;W[qj]C[Mistake]
;B[pk]
;W[oj]
;B[nl]C[White is in trouble - white is split in two.
]))
(;W[rj]C[W chooses to play here sometimes.
]
;B[qk]C[But black still has tricks!]
;W[qj]
;B[rm]
;W[rn]
;B[ok]C[Later on, black finds out a bad aji here.
]
;AE[qh][pj][qj][rj][ok][qk][pm][rm][on][pn][qn][rn][qp][mq]
;W[po]C[A similiar situation can arise in another joseki]
;B[qo]
;W[qn]
;B[qp]
;W[pm]
;B[nq]
;W[qi]
;B[qg]
;W[oi]C[ A similar pattern can emerge in this position.]
;B[ql]
;W[rm]
;B[pj]
;W[pi]
;B[rj]
;W[ri]
;B[ol]C[Black has split white!]
;W[rk]C[White has a good try connecting here]
;B[rl]
(;W[qk]
;B[sk]
;W[pl]
;B[qj]
(;W[pk]
;B[oj]C[But white is still split])
(;W[oj]C[White could try to kill]
;B[pk]
;W[ok]
;B[om]C[But it would be an overplay. White is in trouble]))
(;W[sl]
(;B[qk]
;W[sj]C[In emergencies white could play this ko.])
(;B[sj]C[Black can not cut like this]
;W[qj]
;B[qk]
;W[si]C[This would be a snapback])))))
(;B[mq]LB[pm:A]C[Playing here instead of the peep at A is also seen much.]
;W[op]LB[pm:A]C[However it gives the possibility to white to play this timing move. This move makes a black peep at A less severe]
;B[oq]
;W[ck]C[A great opening
])))
(;W[po]C[If white approaches here...
]
;B[qo]
;W[qn]
;B[qp]
;W[pm]
;B[nq]
;W[qi]
;B[qg]C[Black likes to play in this way.
]
(;W[oi]C[Of course, white is not bad, and black focuses on the territory.
]
;B[co]C[Another opening
])
(;W[ck]
;B[ql]
;W[rm]
;B[pj]
;W[qj]
;B[qk]
;W[rk]
;B[rl]
;W[sl]
;B[rj]
;W[sk]
;B[pi]
;W[ri]
;B[qh]
;W[qc]
;B[pd]
;W[rd]
;B[re]
;W[ol]
;B[fc]C[Another opening - black and white are fine.
])))
