(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]

(;N[game3.sgf]
;B[pd]
;W[dd]
;B[pp]
;W[dp]
;B[fc]
;W[cf]
;B[db]LB[gc:B][hc:A]C[At this moment, white often plays tenuki, or can think about pincering black around A or B.]
;W[cc]C[But when white answers, most players will also answer with a standard move.]
(;B[ic]C[You don't always have to play here however!])
(;AE[pd]AB[pc]
;B[hd]LB[pc:A]C[Or here, when A is low.])
(;B[mc]C[Why not try this? Cho Hunhyun 9p amongst others has played like this.]
(;W[hc]C[White can pincer. How to deal with this?]
(;B[fe]LB[cj:A]C[Simply jumping out like this is usually not recommended. Unless black has strength around A. ]
;W[he]C[However in this case it would be good for white.]
;B[fg]
;W[kc]C[White is happy like this. Black is a bit heavy.])
(;B[cb]C[Playing in the corner immediately is too hasty. Also not good.]
;W[fd]C[White connects easily.])
(;B[ed]C[This is the correct shape move.]
(;W[kc]C[When white defends at the top to make a base, black can also easily make shape with his group.]
;B[de]
;W[ce]
;B[dc]
;W[cd]
(;B[ff]C[Jumping here ends the sequence, but black does not always have to reinforce here.])
(;B[ge])
(;B[he]C[A locally more agressive move you can consider.])
(;B[fq]C[Tenuki is often seen too in this shape.]))
(;W[ee]C[This hane is suboptimal.]
;B[fe]
;W[ef]
;B[dc]
;W[cd]
;B[jc]C[Black takes the initiative at the top.])
(;W[dc]C[White can also play on the vital point to destroy black's eyeshape, but black has a good follow-up in mind.]
;B[cb]
(;W[bb]
;B[de]
(;W[ce]
;B[ec]C[This has become sente.]
;W[bc]
;B[jc]C[Black can pincer!]
;W[he]
;B[ff]C[Black feels good.])
(;W[ee]C[When does white play here?
This is another fighting move.]
;B[df]C[Black will almost always extend here.]
(;W[ce]
;B[ec]
;W[bd]
(;B[dg]
;W[fe]
;B[gd]LB[mc:A]C[One scenario. Hard fighting! But sincer black has reinforcements at A, this fight looks good for black.])
(;B[hd]
;W[id]
;B[he]
;W[ef]))
(;W[fe]C[This has also been played, but it's very risky. ]
;B[ce]C[Locally this move is very painful for white's right side.]
;W[eb]C[When white really wants the top, this is considerable, but black can still fight.	]
(;B[hd])
(;B[gd]C[Or here.])))
(;W[eb]C[White can also immediately play here, for the same fighting result as we just saw.]
;B[ce]
;W[ee]))
(;W[bc]LB[de:A]C[This is a clever move that avoids A Being sente for black. Now black can not make good shape in sente anymore.]
;B[ec]C[The best shape black can play is here. White can choose to play tenuki.]
;W[kc])
(;W[ec]C[When does white play here?
This is a fighting move.]
;B[eb]
;W[fd]
;B[gd]C[When black plays here, white can aim to kill the corner.]
;W[fb]
;B[fe]
;W[gc]
;B[fd]
;W[gb]
;B[bc]
;W[bd]
;B[de]
;W[cd]
(;B[ba]C[Like this it will be a ko for the corner.]
;W[ac]
;B[ab]
;W[bb])
(;B[ac]C[When black plays here, the corner is locally dead with a bent-four.]
;W[ba]
;B[bb]
;W[aa]
;B[ea]
;W[ca]C[This corner is dead, eventhough it looks like a seki at first.]
;AW[fa][ad]LB[fa:A][ad:B]C[When the outside liberties A and B are filled..]
;B[]
;W[ab]C[White can play here.]
;B[da]C[This is the famous bent-four shape.]
;W[ba]C[When white plays here, black is dead.]
;B[aa]C[Black can start a ko, but in the bent-four rules, groups like this often stay untouched untill the very end of the game. White can start this when white wants, and so we can agree that completely at the end of the game, black will not have ko threats: so white kills black.])))
(;W[cb]C[What about blocking here? This move feels like an endgame move.]
;B[de]
;W[ce]
;B[dc]
;W[cd]
;B[ff]LB[cb:A]C[This is the same result as we've seen earlier, but here white has also played a move at A. Which is big, but not big enough at this stage.])
(;AW[mc][pd]LB[mc:A][pd:B]C[If white is strong in the upper right corner, the situation changes a lot. ]
(;W[he]C[White can think about other moves, like this jump.]
(;B[ef]C[In this shape black usually jumps along. This leaves the corner aji open.])
(;B[de]
;W[ce]
;B[dc]
;W[cd]
;B[ff]C[Like this black still wants to jump out, but black has made the white corner a lot stronger. So it is better to jump out immediately.]))
(;W[gd]C[Or this agressive kosumi.]
;B[de]
;W[ee]C[Fight!]))
(;AW[dn]LB[dn:A]C[If white is strong on the left side and wants to build moyo, white can play 2 moves.]
(;W[ef]C[This jump.])
(;W[ff]C[Or this fancy one.]))))
(;W[id]LB[mc:A]C[Sometimes white can play high! This is a good move when white does not want to be pressed down. This is harder to attack for black. So when black is even stronger in the A area, this might be a good move for white.])
(;W[gd]C[A pressing move, also aiming for moyo.]
(;B[gc]
;W[hd]
;B[fd]
;W[fe]
;B[ib]
;W[ic]
;B[hc]
;W[id]
;B[jb]
;W[dn])
(;B[fd]
;W[gc]
;B[fe]
;W[fb]
;B[eb]
;W[gb]
;B[cb]
;W[bc]
;B[dc]
;W[kc]
;B[de]
;W[ce]
;B[ed]
;W[cd]
;B[fg]C[This happened in a game between Kim Kang-keun 1p (black) and Yun Yeong-seon 2p (white)]
;W[ci]C[When white jumps here, white is happy to have settled on both sides.]))))
(;N[game1.sgf]
;B[pd]C[This is a game between Zhong Wenjing 5d (black) and Heo Yeongho 8d (white). Let's skip forward to move 65.]
;W[dd]
;B[qp]
;W[dp]
;B[fq]
;W[cn]
;B[lq]
;W[qj]
;B[qf]
;W[qm]
;B[pn]
;W[ro]
;B[rp]
;W[pm]
;B[om]
;W[ol]
;B[nm]
;W[ip]
;B[cf]
;W[ch]
;B[cc]
;W[cd]
;B[dc]
;W[ed]
;B[bd]
;W[be]
;B[bc]
;W[ce]
;B[fc]
;W[dq]
;B[nl]
;W[ok]
;B[di]
;W[ci]
;B[dj]
;W[dh]
;B[go]
;W[kp]
;B[lp]
;W[kq]
;B[rn]
;W[lo]
;B[rm]
;W[nk]
;B[np]
;W[hn]
;B[fm]
;W[gm]
;B[ho]
;W[io]
;B[eo]
;W[dm]
;B[em]
;W[gk]
;B[fk]
;W[fj]
;B[fl]
;W[gj]
;B[dl]
;W[pb]
;B[qc]
;W[nc]
;B[ll]
;W[hq]
;B[lc]C[Black pincers white at the top.]
;W[ne]LB[qb:B][jc:A]TR[qj][ok][ol]C[And white jumps! In this case the jump is a good move. That is because white already has strength in place at the marked stones. 

The white jump makes a clear miai here of attacking the top at A, or attacking the corner with B.]
;B[ic]C[Black defended the top, so white attacks the corner!]
;W[qb]
(;B[qh]
;W[ck]
;B[dk]
;W[cl]
;B[dn]
;W[cm]
;B[do]
;W[co]
;B[gq]
;W[rl]
;B[rb]
;W[qn]
;B[qo]
;W[on]
;B[mo]
;W[po]
;B[pp]
;W[ln]
;B[lm]
;W[lr]
;B[mr]
;W[kr]
;B[le]
;W[ng]
;B[od]
;W[mc]
;B[ld]
;W[me]
;B[oh]
;W[lf]
;B[ri]
;W[mi]
;B[kf]
;W[lg]
;B[nq]
;W[hc]
;B[hb]
;W[id]
;B[hd]
;W[ec]
;B[eb]
;W[fb]
;B[gb]
;W[jc]
;B[gc]
;W[jb]
;B[kb]
;W[je]
;B[ie]
;W[jf]
;B[jd]
;W[kd]
;B[ke]
;W[id]
;B[kg]
;W[if]
;B[jd]
;W[db]
;B[fa]
;W[id]
;B[he]
;W[jd]
;B[ki]
;W[hf]
;B[lj]
;W[mj]
;B[gf]
;W[hh]
;B[gg]
;W[fe]
;B[fh]
;W[jj]
;B[jh]
;W[ih]
;B[kk]
;W[ra]
;B[rc]
;W[ad]
;B[oc]
;W[bb]
;B[cb]
;W[ac]
;B[da]
;W[ob]
;B[mb]
;W[nb]
;B[ik]
;W[gl]
;B[im]
;W[in]
;B[rj]
;W[qk]
;B[hr]
;W[ir]
;B[eg]
;W[ij]
;B[df]
;W[bf]
;B[er]
;W[dr]
;B[hp]
;W[fn]
;B[iq]
;W[gn]
;B[en]
;W[fo]
;B[ep]
;W[jq]
;B[hq]
;W[eq]
;B[fp]
;W[fr]
;B[jn]
;W[jo]
;B[kn]
;W[ko]
;B[cg]
;W[bg]
;B[jk]
;W[og]
;B[pg]
;W[pi]
;B[ph]
;W[mn]
;B[nn]
;W[oo]
;B[no]
;W[is]
;B[rk]
;W[sm]
;B[so]
;W[oe]
;B[oi]
;W[pe]
;B[qe]
;W[ma]
;B[lb]
;W[ge]
;B[ei]
;W[ff]
;B[eh]
;W[gh]
;B[fg]
;W[oj]
;B[qi]
;W[pj]
;B[cj]
;W[bj]
;B[ib]
;W[ab]
;B[ba]
;W[gd]
;B[hc]
;W[ji]
;B[op]
;W[pn]
;B[hk]
;W[hj]
;B[ja]
;W[lh]
;B[kh]
;W[ej]
;B[ek]
;W[mk]
;B[ae]
;W[af]
;B[nh]
;W[mh]
;B[ls]
;W[ks]
;B[ms]
;W[il]
;B[jl]
;W[hl]
;B[sk]
;W[sl]
;B[kj]
;W[fs]
;B[pf]
;W[of]
;B[fi]
;W[gi]
;B[la]
;W[na]
;B[gs]
;W[pc]
;B[ni]
;W[ql]
;B[sn]
;W[sb]
;B[sc]
;W[qa]
;B[hg]
;W[ig]
;B[fd]
;W[ee]
;B[sa]
;W[ia]
;B[ha]
;W[sb]
;B[gr]
;W[es]
;B[sa]
;W[qd]
;B[rd]
;W[sb]
;B[ca]
;W[sa]
;B[jm]
;W[nd]
;B[qd]
;W[bh]
;B[aa]
;W[ae]
;B[lk])
(;B[rb]C[This would be dangerous.]
;W[rd]C[There is big aji here.]
;B[rc]
;W[qe]
;B[pe]
;W[rf])))
