(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]TM[1800]OT[3x30 byo-yomi]
GN[OSR]WR[1k]BR[3k]DT[2023-02-15]PC[OGS: https://online-go.com/game/51117309]C[Black player 3k
White player 1k

W + R]RE[W+Resign]
;B[pd]
;W[dp]
;B[pq]
;W[dd]
;B[fc]
;W[qc]
;B[pc]
;W[qd]
;B[pe]
;W[rf]
;B[jd]
;W[qo]
;B[np]C[So far so good. It looks like both of the players are studing modern joseki/opening. ]
;W[qg]
;B[cf]C[Double pincer is very big. ]
;W[df]
;B[dg]
;W[ef]
(;B[ce]C[Good choice. ]
;W[cd]
(;B[fd]C[This is an interesting move. ]
(;W[ed]C[What do you think about my idea in the variation?]
;B[ch]
;W[gf]
(;B[hd]TR[fc][fd][jd]C[Black normally doesn't need to defend this shape with the three marked stones. ]
;W[di]C[This is a nice shape move. ]
(;B[ci]C[Correct. ]
;W[dk]
(;B[cj]C[Feels little slow. ]
;W[fq]C[Very big. ]
(;B[bo]
;W[bp]
;B[cp]
(;W[cq]C[white took easy. ]
;B[co]
;W[bq]
;B[cl]
;W[qb]
;B[pb]
(;W[pk]LB[qc:A]C[Here is an idea I like to share with you. White group A is alive, to build territory here looks not very efficient. ]
(;B[qm]
;W[pm]
;B[ql]
;W[qq]
(;B[pl]C[Good choice but losing the corner hurts much too. ]
(;W[pr]
(;B[oq]LB[pr:A]C[If A was not the best move then what should black play?]
;W[or]
(;B[kq]
;W[nr]C[Very good. The whole black group became weak.]
;B[hq]
(;W[mp]LB[ed:B][qq:A]TR[np][oq][pq]C[Group A and B, which one is weaker? B. Group A is super safe that the three marked stones are no longer important.
]
(;B[rp]
;W[qp]
;B[ro]
;W[rq]
(;B[qn]
(;W[mo]LB[mo:C][mp:A][rp:B]C[White A and C, black B are good moves locally but missed global view. I think this is very important for global play. ]
;B[ol]
;W[ir]C[Nice tesuji. ]
;B[iq]
;W[jr]
;B[jq]
;W[go]
;B[kr]
;W[hr]
;B[gq]
;W[gr]
;B[hn]
;W[ho]
;B[io]
;W[in]
(;B[fp]C[Nice counter attack. ]
;W[hm]C[Good move. ]
;B[fo]
;W[gn]
;B[eq]
;W[fr]
;B[gp]
;W[ck]
;B[bk]
;W[dl]
;B[cm]
;W[ld]
;B[lf]
;W[ke]
;B[if]
;W[kf]
;B[lg]
;W[kg]
;B[ih]
;W[ne]
(;B[lc]LB[pc:B][jd:A]TR[ma][mb][mc]C[Here is another idea I like to share with you: 'brothers don't fight against each other'
Black has group A and B (two brothers). Normally we don't want to play the marked area because we will make one brother happy but hurting the other. ]
;W[mc]
;B[kc]
(;W[nb]C[Nice move. ]
;B[nf]
;W[of]
;B[me]
;W[md]
;B[oe]
;W[nd]
;B[pf]
;W[og]
;B[pg]
(;W[oh]
;B[ph]
;W[oi]
;B[pi]
;W[oj]
;B[qk]
;W[ki]C[This is also very good for white of course. ]
;B[fh]
;W[ec]C[Finally white got this urgent move!]
;B[eb]
;W[db]
;B[fb]
;W[bd]
;B[be]
;W[bb]
;B[dq]
;W[dr]
;B[ep]
;W[er]
(;B[nm]
;W[ri]
;B[rj]
;W[pj]
;B[qi]
;W[rh]
;B[qj]
;W[mj]
;B[no]
;W[lb]
;B[kb]
;W[ka]
;B[ja]
;W[la]
;B[jb]
;W[mn]
;B[nn]
;W[sp]
;B[rn]
;W[eg]C[Very good. ]
;B[dj]
;W[dh]
;B[cg]
;W[ej]
;B[ek]
;W[fk]
;B[el]
;W[fl]
;B[em]
;W[hg]
;B[ei]
;W[fj]
;B[eh]
;W[ij]TR[dh][di][ck][dk][dl][np][oq][pq]C[Gave up these 5 stones was very good. Now white became solid in the center with many points. 
White wins now. 

The three important things in this game:
- D18 is super big. It's not only about terriroty but more important is about the base of this white group. 
- The idea about brothers don't fight for the same area, to avoid hurting each other.
- After everybody is safe around this area, the marked stones are not important anymore. So move on. 


 ]
;B[ll]
;W[jl]
;B[hi]
;W[po]
;B[hj]
;W[pn]
;B[hk]
;W[rl]
;B[so]
;W[sk]
;B[sj]
;W[sm]
;B[mm]
;W[kn]
;B[mk]
;W[nk]
;B[lj]
;W[li]
;B[ln]
;W[nl]
;B[om]
;W[ko]
;B[mi]
;W[nj]
;B[mh]
;W[kj]
;B[lk]
;W[ng]
;B[mq]
;W[nq]
;B[lo]
;W[lp]
;B[km]
;W[jm]
;B[qa]
;W[rb]
;B[mf]
;W[lh]
;B[lq]
;W[lm])
(;B[fl]C[Although white is still leading but not very much. How about this way? ]))
(;W[ph]C[Possible to simply capture the black group? ]
;B[oh]
;W[ng]
;B[qh]
;W[pi]
;B[rh]
;W[rg]
;B[mf]
;W[mh]C[I don't see any way for black, do you? ]))
(;W[og]
;B[mb]C[Black can connect. ])
(;W[nd]C[Or white can also defend this way which makes the outside more solid. ]))
(;B[pg]C[Get out from this side. ]))
(;B[im]
;W[jn]
;B[fp]C[How about this? Now white can not ladder the black stone anymore. More interesting fight? ]))
(;W[ec]))
(;B[db]LB[mp:A][rp:B]C[Still chance. 
]))
(;B[db]LB[pl:A]C[More important here because group A is not in danger. ]))
(;W[ec]
;B[mq]
;W[ld]TR[np][oq][pq]C[We don't mind if black saves those stones. I call these kind of stones ''dry stones'', meaning not tasety. ]))
(;B[nr]C[This is sente. ]
;W[mq]
;B[nq]
(;W[kp]
;B[qr]
;W[rr]
;B[qp]
;W[rq]
;B[rp])
(;W[pp]
;B[kq]C[Black group is alive. ])))
(;B[pp]
(;W[qp]
;B[or])
(;W[or]
;B[qp])
(;W[rr]
;B[po])))
(;W[pp]C[This would be the correct shape. ]
;B[oq]
;W[qr]))
(;B[qr]
;W[pp]
;B[oq]
;W[pl]C[This is white's plan. ]))
(;B[pg]
;W[ph]
;B[og]C[How about reduce white while enlarge the upper side? ]
;W[ld]
;B[kf]C[This also makes difficult for white to invade. ]))
(;W[qq]
;B[qr]
;W[pp]
;B[oq]
;W[rq]LB[qc:A][qo:B]C[I would try to push into the corner. Now both A and B are alive. ]
;B[jq]
;W[ec]
;B[qk]C[We don't care if black invades because both white groups are alive. 
This is all about efficiency. Normally we prefer to build territory with our weak stones, instead of living groups. ]
;W[ld])
(;W[rq]C[Or simply keima. ]))
(;W[co]C[white also has this move which will give white a big corner. ]
;B[cq]
;W[bq]
;B[do]
;W[cn]
;B[dq]
;W[ep]
;B[bn]
;W[br]
;B[cm]
;W[dn]LB[dm:B][em:A][en:C]C[Up to here it is an old joseki, next black has A, B and C. 
The result normally is good for whtie because white got a big corner. This is also the reason we don't often see people play this joseki anymore. ]
(;B[en]C[When there are stones near by this can be a tesuji. ]
;W[dm]
;B[dl]
;W[em]
;B[el]
;W[fm]
;B[cl]TR[di][dk]C[But in this situation white doesn't care because the two marked stones are not important. ])
(;B[em]
;W[en]
;B[fn]
;W[dm]
;B[dl]
;W[eo]
;B[cl]
;W[ec]C[Good for white. A big corner plus sente. ])
(;B[dm]
;W[en]
;B[em]
;W[fn]C[I prefer white. ])))
(;B[db]C[This is still a big move but it won't be so severe anymore. ]
;W[eg]LB[di:A]C[because white has this nice move thanks to move A. ]))
(;B[eh]C[I prefer to get out. ]
;W[ec]
;B[fq]C[Black has chance to get sente. I think the lower part is very big. ]))
(;B[eh]C[If black gets out now,]
;W[ci]LB[bh:A]C[this will be very painful for black because next white has move A. ]))
(;B[db]C[Again, take away white's base would be my first choice. ]
(;W[hc]
;B[hd]TR[fd]C[Thanks to that marked stone it is not possible for white to break black. ])
(;W[hd]
;B[hc]C[Black can simply connect. ])))
(;W[de]TR[de][df][ef]C[Normally we don't want to play this move because it gives white a bad shape. ]
;B[ch]
;W[eb]C[How about just live? If our group is not in danger, we can do more around this area without worrying. 
]))
(;B[gd]C[This is a joseki move. ]
;W[ec]
;B[eb]
;W[fd]
;B[fb]
;W[bd]
;B[ci]
;W[db]C[White lives in the corner comfortably, this would not be my choice for Black.])
(;B[db]TR[jd]C[Because black has the marked stone, how about keima into the corner? Taking away white's base seems more interesting. If white is not alive black will have more chance to make the upper side into real territory, and the three stones on the left side will be fine too. Moreover this move itself is very big. ]
;W[fd]
;B[gd]))
(;B[cc]
;W[ce]
;B[dc]
;W[cg]LB[hc:A][lc:B]C[Taking the corner is good for territory but globally this result is good for white, because white got the right direction and white still has A and B invasions. ]))
