(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[Park Young Woon]PB[천국의 나무]WR[7d]EV[Internet tournament]RE[W+Resign]
(;B[qd]C[my internet tournament game
19.08.2013
black-천국의 나무 (opponent internet ID: Tree of Heaven)
white-공격전문가 (my internet ID: Attack Expert)]
;W[pp]
;B[cp]
;W[dd]
;B[hq]C[this is popular opening.]
(;W[oc]
;B[nq]
;W[qn]
;B[cf]
;W[fc]
;B[dj]C[Black wants to make a big framework.]
;W[qf]C[Black's stones work nicely together on the left side. White needs to gain something in this fighting.]
;B[pe]
;W[pf]
;B[nd]
;W[mc]
;B[oe]
;W[pj]
(;B[ld]C[Joseki]
;W[lc]
(;B[nc]
;W[nb]
;B[kc]C[This push and hane were an overplay.
See the game below for an example where this combination is possible.]
;W[kd]
;B[md]
;W[jc]SQ[fc]C[White can now capture this stone, the marked white stone helps him in this fight.]
;B[kb]
;W[lb]
;B[jb]
;W[ic]
;B[ib]
;W[hc]
;B[ke]
;W[jd]
;B[pb]
;W[ob]
;B[la]
;W[mb]
;B[pc]
;W[hb]C[black decided to sacrifice his stones. but the result is good for white.]
(;B[pr]
(;W[fp]C[White needs to start invading black's territory.
This is the best timing to do so.]
(;B[do]C[This move is normal. 
Don't play too close to white's weak stone.]
;W[go]
;B[jp]LB[gl:A]C[Normally white needs to come back to defend with A. 
But in the game Park Young Woon played tenuki, because white had a good combination in the corner up his sleeve.
]
(;W[ch]C[The biggest point on the board.]
(;B[cd]C[Black plays a powerful move.
White is already strong in this area. Black aims at making white overconcentrated.]
;W[cc]
;B[de]
;W[bd]
;B[be]C[start to fight ko.]
;W[ce]
;B[od]
;W[ia]
;B[cd]
;W[dq]C[White already had this move in mind, so is happy to play it as a ko threat. When playing ko, be careful not to play bad ko threats.]
;B[cq]
;W[ce]
;B[ha]C[This ko threat is slightly damaging.]
;W[ga]C[When white plays this move, white becomes a lot stronger.]
;B[cd]
;W[eh]LB[ha:A]SQ[be][de][cf]C[This move is interesting. white doesn't have a ko threat. 
White shouldn't play a damaging ko threat! Like the one black played at A.

White's aim here is for black to make the ko bigger and then ignore black's next ko threat. This jumping move will then help to capture the marked stones. ]
(;B[ci]LB[bj:A]C[Black prevents the slide at A, which also makes losing the ko a bit less painful.]
;W[bh]
;B[fj]LB[go:A]C[This move pressures the group at A.]
(;W[ce]C[The game - a minor mistake. This gives black the opportunity to punish white!]
(;B[oa]C[But black failed to punish white and played here.]
;W[ja]
;B[cd]
;W[fm]
;B[dm]
;W[jn]C[White escapes.]
(;B[no]LB[ql:A][lq:B]SQ[jn][go]C[A good move by black. It has many purposes.
It seperates the marked stones.
It aims at invading at A and it prevents a white invasion at B.]
(;W[ce]C[White fights back]
;B[na]
;W[ka]
;B[cd]
;W[ln]
(;B[pk]C[This move is interesting. White need to answer carefully.]
(;W[mp]C[White chooses to attack first!]
;B[np]
;W[mq]
;B[mo]
;W[kp]C[Very complicated fighting.]
(;B[kq]C[It looks natural. But this was the losing move!]
;W[lp]
;B[nr]
;W[mr]LB[qq:A]C[Black has been split into two weak groups. After this A is also painful for black.]
(;B[qj]C[Black has no choice.]
;W[qq]
;B[nm]C[Black needs to run out.]
;W[gq]
;B[in]
;W[im]
;B[hn]
(;W[hp]
;B[jo]
;W[kn]
;B[hm]
;W[io]
;B[ql]
;W[qr]
;B[oj]C[The fight has ended. White is slightly better.]
;W[ce]
(;B[er]C[A good move]
(;W[iq]
;B[cd]
(;W[mh]C[A ko threat while reducing black.
Note that white can not live inside black's territory anyway.]
;B[oh]
;W[ce]
;B[hr]
;W[jq]
;B[cd]
;W[ng]
;B[og]
;W[ce]
;B[rm]
;W[rn]
;B[cd]
;W[of]
;B[nf]
;W[ce]
(;B[ef]C[Black tries to escape. White must be careful not to overplay here.]
;W[di]LB[dh:A]C[White must play this move now.
It's a defense against black's wedge at A.]
(;B[ei]C[The only move.]
;W[dh]
;B[fg]
;W[cj]
;B[ck]
;W[bj]
;B[dk]
;W[fh]C[Only one way. No other way.]
;B[hg]
;W[gh]
;B[if]
;W[ii]C[white is taking control in the center.]
;B[jh]
;W[ih]
(;B[jg]LB[hf:A]C[Black played like this, but it left big aji at A.]
;W[kj]
;B[li]
(;W[ki]
;B[lh]
;W[cd]
(;B[mk]
;W[hf]C[This was the finishing blow.]
;B[he]
;W[gf]
;B[ge]
;W[gg]
;B[je]
;W[fe]C[After this, black's stones were captured. Black soon resigned.]
;B[bk]
;W[ak]
;B[al]
;W[aj]
;B[cl]
;W[dr]
;B[eq]
;W[ep]
;B[dp]
;W[fr]
;B[ds]
;W[gl]
;B[ms]
;W[kr]
;B[ll]
;W[kl]
;B[hj]
;W[ik]
;B[fs]
;W[gs]
;B[pm]
;W[pn]
;B[sn]
;W[so]
;B[sm]
;W[rq]
;B[on]
;W[lj]
;B[mj]
;W[es]
;B[cr]
;W[ls]
;B[ro]
;W[sp]
;B[ig]
;W[hk]
;B[lm]
;W[km]
;B[mn]
;W[kh]
;B[kg]
;W[gd])
(;B[fe]C[Now black needs to answer to protect against the cut. ]
;W[dr]
;B[eq]
;W[ep]
;B[dp]
;W[fr]
;B[cr]
;W[mk]
;B[ol]
;W[gl]C[But white is leading by komi.]))
(;W[hf]C[White can think about playing this directly.
But at this moment the aji is bad. White should wait.
]
;B[cd]
;W[bc]
;B[ed]
;W[dc]
;B[he]
;W[gf]
;B[gg]
;W[ig]
;B[ie]C[White is captured. It was an overplay.]))
(;B[ig]C[This is the best move for black, but black's territory is not big enough.]
;W[ji]
;B[kh]
;W[ki]C[white is better.]))
(;B[cj]C[Passive. White will be happy.]
;W[fg]))
(;B[gr]C[This is very big, but not big enough.]
;W[fg]
;B[cd]
;W[bc]
;B[fq]
;W[gp]C[The exchange is a bit better for white.]))
(;W[qh]LB[pj:A]C[What about moves in this area? Can white make life? It seems white has aji with the stone at A.
Actually no..]
;B[oh]
(;W[rj]
;B[rk]
;W[qi]
;B[pi]
;W[rh]
;B[re]
;W[rf]
;B[si]
;W[sj]
;B[pg]
;W[qg]
;B[sg]C[white can't live.])
(;W[og]
;B[ph]
;W[ng]
;B[mh]C[white can't live.])))
(;W[fg]C[White can not play tenuki]
;B[iq]
;W[ip]
;B[gr]
;W[dr]
;B[fq]LB[jn:B][io:A]C[Black will live here, and on top of that white A and B have been cut, white is in trouble]))
(;B[li]C[Playing here looks huge, but it is not enough for black.]
;W[fg]C[After this white is ahead]))
(;W[hm]C[White could also try to kill everything]
;B[hp]
;W[gr]
;B[jo]
;W[kn]
;B[lr]
;W[jr]C[White could try to kill everything like this and will succeed.
It was too hard to read though given that white was in byo-yomi]))
(;B[qq]C[This is the honest move, but it leaves black empty handed.]
;W[qk]
;B[ql]
;W[rk]C[White destroyed black's lower side. But black didn't get anything in return.
Good for white.]))
(;B[lp]C[Black should have played this move instead. It is hard to find.]
;W[kq]
;B[lq]
(;W[qk]
;B[ql]
;W[pl]
;B[ok]
;W[qj]
;B[pm]
;W[rl]
;B[kr]
;W[jq]
;B[jr]
;W[iq]
;B[ir]
;W[ip]LB[bc:B][ed:A]C[Black is not bad at all. After this black can fight ko at A or B.])
(;W[jq]C[When white ignores the right side it is also playable for black.]
;B[qj]
;W[qq]
;B[pi]
;W[gq]LB[bc:B][ed:A]C[It's a big exchange.
Black can still make a ko at A or B. This is the best variation for both.])))
(;W[qk]C[Just hane is simple. but black is hoping for this.]
;B[ql]
;W[rk]C[A calm move we like a lot.]
;B[oj]
;W[pi]
;B[lp]LB[ok:B][ol:A][pl:C]C[This was black's plan. Later moves like A, B and C are all sente.
That means that the centre is difficult to use for white.]))
(;B[lp]C[Playing here is the simple move. However the flow of the game is good for white.
Black needs to complicate things.]
;W[nn]
;B[oo]
;W[pm]C[Like this white can block the centre off.]))
(;W[nm]C[When white answers black is happy with this exchange.]))
(;B[qq]
;W[kp]C[White can flatten black like a pancake]
;B[kq]
;W[lq]
;B[lp]
;W[ko]
;B[lr]
;W[jq]
;B[kr]
;W[ip]
;B[jr]
;W[iq]
;B[ir]C[Too painful for black. White is very strong.]))
(;B[im]C[This is black's chance!
Black has to attack right now and take control.
]))
(;W[fm]C[White should play here immediately. To protect his group.]
;B[dm]
;W[jn]))
(;B[bc]C[Fighting this ko directly is not a good idea for black.]
;W[ce]
;B[oa]
;W[cd]C[White sacrifices the top.]
;B[na]C[This move is worth 26 points.]
;W[bj]LB[bc:B][eh:A]C[Now the exchange of white A for black B became extremely good for white.]))
(;B[cc]C[Invading at 3-3 would be good for white in this case.]
;W[cd]
;B[bd]
;W[be]
;B[bc]
;W[ce]
;B[eb]
;W[ec]
;B[fb]
;W[bj]C[white is not bad.]))
(;W[dq]
;B[cq]
;W[gq]C[White has this combination in mind, to make eyeshape.])
(;W[bd]LB[ch:A]SQ[hb][hc][ic][jc][jd][kd]C[Sometimes the choice to play this move or the invasion at A is hard. But perhaps in this case white becomes too overconcentrated when white plays here. White's marked stones are overconcentrated. So A is the only option here.]))
(;B[eo]C[This move looks interesting, but it actually makes white stronger.
It almost "attaches to a weak stone"]
;W[hp]
;B[ip]
;W[ho]
;B[gq]
;W[fo]
;B[en]
;W[fq]LB[ch:A]SQ[en][eo]C[With the marked stones black made territory on the fifth line, which is good.
However white can still invade at A and more importantly his group on the lower side got a lot stronger than in the game.]))
(;W[qq]C[Blocking here is a mistake.]
;B[lp]
;W[fp]LB[lp:A]C[Now this invasion is harder for white, as black got stronger on the lower side with his stone at A.])
(;W[ep]C[Invading here is not easy for white.]
;B[dn]LB[hq:A]C[The next move is hard for white.
Because A is so close.]
(;W[cq]
;B[bq]
;W[dq]
;B[br]C[White has no good extension on the lower side.])
(;AE[hq]AB[iq]LB[iq:A]C[When the A stone is one space to the right, this position is ok for white. It occurs often, like in the Chinese opening.]
;W[cq]
;B[bq]
;W[dq]
;B[br]
;W[gq]C[White can make a base now.]))
(;W[eq]C[This move is also hard for white]
;B[dq]
;W[ep]
;B[dn]C[white is heavy.]))
(;B[ep]C[Also possible for black.]
(;W[lq]C[White will invade here.])
(;W[cq]C[White also has this probing move]
;B[dq]
;W[co]
;B[bp]
;W[do]
;B[dp]
;W[dl]C[White can invade like this.])))
(;B[kd]
;W[kc]
;B[jd]C[Black has to extend here]))
(;B[nc]
;W[nb]
;B[ob]LB[lb:A][pb:B]C[black can play like this.
white can play tenuki now and choose to play A or B later.]))
(;W[cj]C[In the game black built a big framework on the left side.
White could also consider to play on the big point on the left side, but the result will not be that great.]
;B[fc]
;W[df]
;B[db]
;W[cc]
;B[ic]SQ[qd][cp]C[When black play just normal moves, black is not bad.
This is mostly because of the marked stones being at the 3-4 points and not on the hoshi points, taking more territory and it's difficult to find a good approach move.
]
;W[qg]C[The right side is the biggest open space, but there is not such a good approach move.]
;B[od]C[Black is happy to secure the corner]
;W[qj]))
(;B[pd]C[Black: Chen Yaoye Tianyuan
White: Peng Quan 7d
A game from 2009]
;W[dc]
;B[dq]
;W[qp]
;B[ce]
;W[oq]
;B[fc]
;W[ed]
;B[fd]
;W[df]
;B[cg]
;W[ee]
;B[jd]
;W[dh]
;B[ch]
;W[cf]C[White pushes here]
;B[bf]
;W[ci]C[And plays the same combination]
(;B[di]C[Black can not cut in this case]
;W[dg]
;B[cj]
;W[bi]
;B[bh]
;W[bj]
;B[ck]
;W[bk]
;B[cl]
;W[bl]
(;B[bm]C[black can not block here now.]
;W[cm]C[Black has too many weaknesses])
(;B[cm]
;W[ah]
;B[bg]
;W[ei]
;B[dj]
;W[bd]
;B[be]
;W[cd]C[White wins the capturing race now.]))
(;B[bi]LB[cn:A]C[In this game black had to give in, because black does not have a supporting stone at A.]
;W[di]
;B[bj]
;W[be]
;B[bg]
;W[bd]
;B[dk]
;W[qf]
;B[nd]
;W[qi]
;B[jp]
;W[do]
;B[fp]
;W[cq]
;B[cr]
;W[cp]
;B[br]
;W[dm]
;B[dg]
;W[eg]
;B[eh]
;W[fg]
;B[en]
;W[em]
;B[fm]
;W[fn]
;B[gn]
;W[ep]
;B[eq]
;W[fo]
;B[go]
;W[eo]
;B[cn]
;W[cm]
;B[bn]
;W[bm]
;B[ao]
;W[am]
;B[an]
;W[dn]
;B[ei]
;W[lq]
;B[kr]
;W[pl]
;B[re]
;W[lc]
;B[jc]
;W[oc]
;B[pc]
;W[qe]
;B[qd]
;W[rf]
;B[le]
;W[lr]
;B[rp]
;W[qq]
;B[qm]
;W[ql]
;B[qo]
;W[rn]
;B[nn]
;W[jq]
;B[rm]
;W[on]
;B[qn]
;W[oo]
;B[rq]
;W[rr]
;B[rl]
;W[rk]
;B[qr]
;W[pr]
;B[pp]
;W[pq]
;B[sr]
;W[rs]
;B[sn]
;W[ip]
;B[gq]
;W[eb]
;B[jo]
;W[iq]
;B[fb]
;W[ke]
;B[kf]
;W[pb]
;B[qb]
;W[rd]
;B[ob]
;W[sl]
;B[sq]
;W[oe]
;B[od]
;W[lf]
;B[me]
;W[je]
;B[kg]
;W[ie]
;B[cj]
;W[fl]
;B[gm]
;W[dl]
;B[bk]
;W[gl]
;B[hl]
;W[gj]
;B[hk]
;W[fj]
;B[hg]
;W[fh]
;B[gf]
;W[fi]
;B[ih]
;W[ej]
;B[ah]
;W[hp]
;B[in]
;W[gp]
;B[hr]
;W[kk]
;B[ln]
;W[ii]
;B[hi]
;W[hj]
;B[kq]
;W[ks]
;B[kp]
;W[jr]
;B[jl]
;W[ji]
;B[lh]
;W[ng]
;B[nh]
;W[mh]
;B[mi]
;W[mg]
;B[li]
;W[ni]
;B[nj]
;W[oi]
;B[ij]
;W[hc]
;B[hd]
;W[hh]
;B[gh]
;W[gi]
;B[hh]
;W[gb]
;B[id]
;W[ik]
;B[jj]
;W[mk]
;B[nk]
;W[mm]
;B[ml]
;W[hm]
;B[im]
;W[ll]
;B[nl]
;W[lm]
;B[nm]
;W[jk]
;B[kj]
;W[il]
;B[mn]
;W[gk]
;B[fa]
;W[rc]
;B[hn]
;W[fq]
;B[fr]
;W[rb]
;B[pe]
;W[pf]
;B[of]
;W[og]
;B[sm]
;W[sk]
;B[pk]
;W[pj]
;B[db]
;W[cb]
;B[da]
;W[ge]
;B[fe]
;W[ff]
;B[he]
;W[ra]
;B[pa]
;W[ca]
;B[ea]
;W[mp]
;B[ec]
;W[cc]
;B[po]
;W[jm]
;B[km]
;W[kl]
;B[kn]
;W[nf]
;B[ne]
;W[op]
;B[ok]
;W[qk]
;B[no]
;W[np]
;B[hq]
;W[gg]
;B[hf]
;W[lj]
;B[ki]
;W[co]
;B[aq]
;W[hl]
;B[ek]
;W[fp]
;B[lg]
;W[mf]
;B[ae]
;W[ad]
;B[af]
;W[bq]
;B[ar]
;W[is]
;B[hs]
;W[ir]
;B[er]
;W[ak]
;B[aj]
;W[al]
;B[mj]
;W[lk]
;B[lo])))
