(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]
GN[9 august 2026]PW[Cris Bratu]PB[Romulus Moghioros]WR[5k]BR[5k]PC[https://online-go.com/review/1752168]RE[W+24.50]
;B[qp]
;W[cc]
;B[pc]
;W[cq]
;B[oq]
;W[qe]
;B[qg]
;W[oe]
;B[nd]
;W[ne]
;B[md]
;W[me]
;B[ld]TR[qg]C[How to attack the black stone?]
(;W[qi]TR[ph]C[After white's move, black can escape by playing kosumi (marked with a triangle)...]
(;B[pf]
;W[pe]
;B[pi]
;W[qh]
;B[ph]
;W[qj]C[If white's plan was not to connect, I would recommend not to play the R12 exchange...]
(;B[rf]
;W[qm]
;B[rd]
;W[re]
;B[se]
;W[qc]
;B[qd]
;W[oc]
;B[pb]
;W[pd]C[This move looks like a sente move to destroy an extra point of territory of black...]
;B[rc]
;W[ob]
;B[qb]
;W[od]C[And it worked in the game.
However, ...]
(;B[le]
;W[lf]
;B[kf]
;W[jc]C[This move doesn't really let white connect the big group...]
(;B[lc]
;W[kb]
;B[lb]
(;W[qf]C[Not necessary exchange...]
;B[rh]LB[qf:A][rh:B]C[A-B exchange was not mandatory for white to get a sente move in the center, but because of playing this exchange, black got the entrance to destroy white's base on the right.]
;W[of]
;B[pg]
;W[lg]
;B[id]
(;W[jd]C[If the exchange is not mandatory and gives a good shape to the opponent, better not to play it...]
;B[je]
;W[ic]
;B[hd]
;W[hc]
;B[fc]
;W[gc]
;B[dd]
;W[gd]LB[ld:1][oe:2]C[The center is more important now than points in the corner, because there are more weak groups involved (1 and 2) by the extra strength, which white gets in the center.]
;B[dc]
;W[cd]
;B[ce]
;W[be]
;B[bf]
(;W[bd]C[The more groups are weak, the more important the center...]
;B[df]
;W[db]
;B[eb]
;W[cb]
(;B[gb]C[Unnecessary exchange / wrong order for black - now white can try to escape, but it was impossible to make unconditional life with everything on the top.

I would recommend to start playing in the center first...]
;W[gf]
;B[kg]
;W[lh]
;B[kh]
;W[li]
;B[pl]
;W[ql]
;B[pk]
(;W[qk]C[This move looks very slow - black's group wasn't weak, so even if black killed the three white stones, it's not a problem for white. But now (even after white's connection) the whole white's group doesn't have two eyes yet.

Instead...]
;B[pj]
;W[ri]
(;B[pm]C[A very bad exchange for black...]
;W[qn]C[Now white is already alive on the right.]
;B[dp]
;W[cp]
;B[do]
;W[co]
;B[cn]C[This move usually would be bad (it's not a good move locally because it will be hard for black to sacrifice any of these two groups, which will be cut in the next move), but in this case (when black has a lot of strength in the center), this move might be ok.]
;W[dn]
(;B[en]C[But in order to make that move look fine, it would be necessary to keep white with less options to lower any of black's groups (so that black wouldn't get overconcentrated).
For example...]
;W[dm]
;B[cm]
;W[dl]
;B[cl]
;W[dk]
;B[ck]
;W[dj]
;B[cj]
;W[eq]
;B[fp]
;W[fq]
;B[gq]
;W[cg]
;B[dg]
;W[ch]
;B[ci]
;W[dh]C[It looks like a good deal for white - if white can capture the black's group on the top, white gets more points than black in the center and additionally white defends his own group on the top.]
;B[di]
(;W[cf]
;B[fi]
;W[eh]
;B[ei]
;W[ki]
;B[hh]
;W[fd]
;B[fg]
;W[eg]
;B[ff]
;W[ef]
;B[ge]
;W[fe]
;B[he]
;W[fh]
;B[gg]
;W[hf]
;B[ie]
(;W[gh]C[If own groups are not super weak and if the opponent is forced to cut with a bad shape, it's usually more convenient to let opponent cut with a bad shape...]
;B[hg]
;W[gi]
;B[gj]
;W[gp]
;B[go]
;W[hp]
;B[fo]
;W[hi]
;B[ii]
;W[hj]
;B[gk]
;W[ij]
;B[ji]
;W[jj]
;B[jh]
;W[sh]
;B[rg]
;W[kk]C[This move seems ultra-safe. After getting the advantage in the top-left, it might be tempting to play there, but white still has a shape problem in the lower-left corner...]
;B[dq]
;W[dr]
(;B[hq]
;W[gr]
;B[hr]
;W[fr]
;B[ip]
;W[ho]
;B[jp]
;W[gl]
;B[fl]
;W[fm]
;B[gm]
;W[ep]
;B[eo]
;W[gn]
;B[hn]
;W[hm]
;B[io]
;W[fk]
;B[fj]
(;W[el]C[The capturing looks risky...]
(;B[bh]
;W[bg]
;B[ai]
;W[bo]
;B[bn]
;W[ro]
;B[rp]
;W[sp]
;B[qo]
;W[pn]C[This move is very risky:
White can't really escape, because black has a lot of strength in the center.
Additionally, black doesn't lose almost anything from playing this ko (but white can lose a group).]
;B[rn]
;W[sn]
;B[so]
;W[ig]
;B[if]
;W[ro]
;B[ng]
;W[mf]
;B[so]
;W[rm]
;B[sm]
;W[sl]
;B[sj]
;W[sn]
;B[ro]
;W[si]
;B[rk]
;W[nn]
;B[on]
;W[oo]
;B[om]
;W[pp]
;B[pq]
;W[qq]
;B[rq]
;W[po]
;B[no]
;W[qr]
;B[rr]
;W[nq]
(;B[mo]
;W[pr]
;B[or]
;W[nr]
;B[ps]
;W[op]
;B[qs]
;W[np]
;B[lr]
;W[lq]
(;B[kq]
;W[lp]
;B[mr]
;W[lo]
;B[mn]
;W[ln]
;B[lm]
;W[km]
;B[ll]
;W[jn]
;B[lj]
;W[lk]
;B[mj]
;W[kj]
;B[kl]
;W[jl]
;B[im]
;W[in]
;B[mk]
;W[mm]
;B[ml]
;W[mp]
;B[ho]
;W[hk]
;B[nm]
;W[nh]
;B[ni]
;W[oh]
;B[og]
;W[mh]
;B[ao]
;W[ap]
;B[an]
;W[bq]
;B[hs]
;W[oi]
;B[oj]
;W[sg]
;B[sf]
;W[gs]
;B[ka]
;W[ja]
;B[la]
;W[nb]
;B[kc]
;W[jb]
;B[fn]
;W[gm]
;B[em]
;W[ej]
;B[mn]
;W[ms]
;B[ls]
;W[ns]
;B[no]
;W[kp]
;B[jr]
;W[jo]
;B[mi]
;W[ag]
;B[bk]
;W[ah]
;B[bi]
;W[mo]
;B[nn]
;W[sm]
;B[oa]
;W[na]
;B[pa]
;W[nc]
;B[ke]
;W[os]
;B[mg]
;W[mq]
;B[nf]
;W[kd]
;B[mc]
;W[mb]
;B[ma])
(;B[lp]
;W[mp]
;B[lo]
;W[kr]
;B[kq]
;W[mr]C[Black can create another ko now.]))
(;B[np]C[Easier for black.]
(;W[op]
;B[pr])
(;W[pr]
;B[or]
;W[op]
;B[nr]
;W[mq]
;B[mo])))
(;B[il]C[Black can try to kill the white group...]
;W[hl]
;B[hk]
;W[ej]
;B[fn]
;W[em]C[Ko is not good for white.]))
(;W[hk]C[White can simply defend the weakness instead (black can only capture one stone).]))
(;B[cr]
;W[er]
;B[br]C[There are quite many points for black to take.]
;AE[fo][go][gp][hp][dq][fq][gq][br][cr][dr][er]C[In this shape...]
;W[fr]C[This move protects the cutting.]))
(;W[gi]
(;B[gh]
;W[hi]
;B[ih]
;W[ii]LB[fk:A]C[This way, white can even play at A in the future.])
(;B[gj]LB[hg:B][gh:A]C[If black plays the same move now (but without the A-B exchange)...]
;W[hi]LB[hg:A]C[The extension becomes sente for white (it'd be possible for white to play at A then).])))
(;W[eh]LB[cf:A]C[I think the A move might not be necessary for white (if white is able to connect with the other group on the top, white might never need to play at A).]))
(;B[cm]
;W[en]
;B[dq]
;W[dr]
;B[er]
;W[cr]
;B[fp]
;W[dl]
;B[bk]
;W[dj]
;B[dm]
;W[em]
;B[el]C[If black is ok with this kind of cuts, then the initial move at C6 would be ok.
If black doesn't feel like he has enough strength in the center to deal with this kind of fight, then the C6 move is just too aggressive and not so good.]))
(;B[rn]C[Black still has an opportunity to attack / try to kill the white's group on the right.

If black was afraid that white would escape...]
;AE[rn]
;W[]
;B[kk]LB[rn:A]C[Black can aim for getting an extra wall / some additional strength in the center, so that ultimately it would be possible to simply play at A and kill the white group on the right.]))
(;W[qo]C[I would recommend to look for moves, which could give white the opportunity to escape or making eyes with the whole group.]
;B[rp]
;W[oo]))
(;B[ki]C[In order to escape with the right group, white needs to make the black group stronger. And then it's easier to look for a way to kill the other group...]))
(;W[cf]
;B[de]
;W[bg]
;B[bd]
;W[af]
;B[bc]LB[kg:A][jh:C][kh:B]C[It's not a problem for white to simply sacrifice those two stones in sente - white will have time now to play A, B or C - to defend own weak group, then black will defend his group, and then white will still be able to play at F18-E18-G19 and defend his group at the top.]))
(;W[hc]C[In the future, if white wants, white can still play the same sente move in the center.

However, without that exchange, there is one more weakness in the black shape...]
;B[fq]
;W[ke]))
(;W[lg]
;B[ng]
;W[og]C[It's still possible for white to make use of the weakness in black's shape...]
;B[of]
;W[nf]
;B[nh]C[If black extends...]
;W[qf]C[There is still a cutting point.]))
(;B[lg]
;W[mf]
;B[je]
;W[nh]LB[jc:A][je:B]C[White can't connect on the top, so white would be forced to try to escape towards the center.
But now it's more difficult for white, because of the A-B exchange - it helps black more in this fight.]))
(;AE[ob][qb][rc][od]AW[qc]C[Black has just got an opportunity to connect. How to connect on the top?]
;B[ob]TR[rc]C[The sente move (marked with a triangle) doesn't help white now to capture the other black stones...]
;W[nc]
;B[nb]
;W[mc]
;B[lc]C[And black can connect everything in the top-right.]
;AE[nb][ob][lc][mc][nc][pd]C[How not to give opponent a chance to connect?]
;W[ob]
;B[od]
;W[pd]
;B[qb]
;W[rc]C[Why in this order?]
;AE[ob][qb][rc][od]TR[pd][oe][pe]C[The idea is to delay as much as possible the time of creating a bad shape - the later the bad shape appears, the bigger the chances to avoid getting even a worse shape...]
;B[ob]
;W[od]TR[oc][od][pd][oe][pe]C[In the opening and middle game the good-vs-bad shapes difference is usually more important than a few points difference.
Only in the endgame (when it's more difficult to make use of a bad shape for attacking something), the points usually become more important than the shapes.]))
(;AE[ph][qh]C[If at this point black's stone appears...]
;B[ph]LB[rf:B][qh:A]TR[og]C[White A for black B exchange is not so interesting for white:
By plaing the A-B exchange white doesn't get extra points, the only benefit for white it would basically only be the possibility of playing the move marked with a triangle in sente in the future.
However, the B move, helps black destroying white's chances for making eyes in the corner and helps black creating more eye-space for himself.]))
(;B[ph]
;W[pi]
;B[nh]
;W[oi]
;B[oh]TR[qg]SQ[ne]C[The more white tries to attack the black stones, the weaker white's group (marked with a square) becomes.]))
(;W[pj]C[That's why I would suggest playing a different move - a further one - so that it would be easier for white to try to block the black's potential escape towards the center...]
(;B[og]
;W[ph]
;B[pg]
;W[nh]
;B[ng]
;W[mg])
(;B[ph]
;W[ni])
(;B[oh]C[However, if white doesn't see any possibility of blocking the escape route for the black stones AND one of the white groups might become weak by trying to block without really blocking, it's better to stop putting more pressure over the opponent stones and leave more space for white's group which could become much weaker...]
;W[pm]TR[pm]SQ[ne]C[Now white's group marked with a triangle is much safer (it has a base) and the other white's group (marked with a square) still has big enough space for escaping and attacking the black two stones in the future.])
(;AE[pj]AW[qi]AB[ph]LB[ph:B][qi:A]C[But (a question to the players) if the A-B exchange has already been played, how could white continue playing there?]
;B[]
;W[qk]C[This kind of move, in my opinion, would be the most interesting one - white wasn't able to block black in the center and had another group, which could become very weak.
So, instead of trying hard to block anyway, white could simply make the other stone stronger.
If black doesn't do anything with his kosumi shape now...]
;B[fq]
;W[ni]C[It becomes way easier for white to block the black stones on the right.])))
