(;GM[1]FF[4]AP[Drago:4.12]PL[W]SZ[19]CA[UTF-8]AW[pc][qc][ob][na][mb][nc][nd][lc][cc][dc][dd][de][cf][bg][ch][dh] [fi][ej][fk][ck][el][dl][cm][bm][er][fq][fo][eo][fm][gm][gl][hq] [jq][jr][js][kq][lk][mk][mj][ni][pj][pk][qn][qo][qp][rp][sq][rs] [qr][pr][pq][pm][om][ol][on][no][mp][lp][ln][lm][ml]AB[qb][pb][qd][pd][od][oc][kb][jd][gc][cd][eg][eh][ei][di][ci][bi] [bh][fj][gj][dm][em][en][cn][co][do][dp][cq][dr][ip][kp][ko][kn] [km][kl][ll][jj][jg][mh][pi][ph][qj][qk][pl][rl][rm][qm][qq][rq] [rr][or][oq][op][pp][pn][po][lq][mq][kr][np][ls][ns][nk]C[The black stones in the center are thin, how should White exploit the thinness and be victorious?])
Good luck.
Of the people I have shown this to on KGS, I can tell you that Tien read most of the variations in his head and only missed one when I showed him the answer. So if you can figure this out in your head, you are quite strong.
Though we think of a game as being quite a distance from calculation and life and death problems, a game will still come to a stage requiring fierce contact fights. At such time, calculating skill will be most important.
http://tchan001.wordpress.com
A blog on Asian go books, go sightings, and interesting tidbits
Go is such a beautiful game.
I want to threaten to capture G11 to create a splitting attack between L8 and D11, but really I'm just restating the problem; black's centre looks a little thin. J9 K9 J10 ...K11? is it even necessary? H10 G11... H11? But H11 doesn't really look sente and can be cut off itself...
White has many center moves that quickly lead nowhere. Only one move seems to give White any chance, although I'm sure I'm missing Black's best defense.
With a territorial lead, Black only needs to save his center stones (without endangering his left side group) to win?
So White needs a splitting attack between the weak left side and center groups.]
(;W[ij]C[A splitting attack that seems to give practical chances to equally pressure Black's 2 stones on the left and the center stones on the right. ] (;B[hi]C[Defending the left in the top direction, ...];W[jk]C[... White immediately cuts off the center group.]) (;B[hk]C[Defending the left in the bottom direction ...];W[ik]C[... seems to let White keep the splitting attack going. Looks complicated!]) (;B[hj]C[Defending the left group with the clamp, ...];W[jk]C[... seems to fail to this cut.]) (;B[ji]C[Black doesn't have time to rescue the center stones this way?];W[gi];B[hj];W[ik]C[Black seems to lose either the left or center group.])) (;W[hj]C[A splitting attack, but a bit too far from Black's group on the right.];B[gi]C[Black saves the weak stones to the left, and White has no good follow up to cut off the center stones to the right?];W[jk]C[For example?];B[kk];W[kj];B[ik];W[jl];B[il];W[jm];B[in];W[ji];B[ij]C[White is too thin to cut off the center stones.] ) (;W[ji]C[Too soft];B[ij]C[Black seems strong everywhere now.]))
(;GM[1]FF[4]AP[Drago:4.12]SZ[19]CA[UTF-8]AW[pc][qc][ob][na][mb][nc][nd][lc][cc][dc][dd][de][cf][bg][ch][dh] [fi][ej][fk][ck][el][dl][cm][bm][er][fq][fo][eo][fm][gm][gl][hq] [jq][jr][js][kq][lk][mk][mj][ni][pj][pk][qn][qo][qp][rp][sq][rs] [qr][pr][pq][pm][om][ol][on][no][mp][lp][ln][lm][ml]AB[qb][pb][qd][pd][od][oc][kb][jd][gc][cd][eg][eh][ei][di][ci][bi] [bh][fj][gj][dm][em][en][cn][co][do][dp][cq][dr][ip][kp][ko][kn] [km][kl][ll][jj][jg][mh][pi][ph][qj][qk][pl][rl][rm][qm][qq][rq] [rr][or][oq][op][pp][pn][po][lq][mq][kr][np][ls][ns][nk]C[White to move
The black stones in the center are thin, how should White exploit the thinness and be victorious?];W[ij]C[Right
The vital shape point] (;B[hk]C[Influenced by White's move, Black makes a diagonal. A straight out resistance leads to even greater loss.];W[ik]C[Drives Black towards the bottom. The center is very unlikely for Black to regain control at this point.];B[hl] ;W[ji]C[The right order of sequence. Now White has basically connected with the group to the right.];B[hi]LB[gi:A]C[Black must reinforce else White plays at A and cuts off Black.];W[il];B[hm];W[im];B[hn];W[in];B[ho] ;W[jp]C[After this push, White has surrounded the 7 Black stones and is in a great position.];B[ii] ;W[ki]C[White has successfully profited by around 20 points in the center]) (;B[ik]C[Black tries to resist];W[hk]C[Good] (;B[hj]C[Black can only cut];W[ii] (;B[gh]C[To gain life first for the group on the left.];W[jk];B[il] ;W[ki]C[White nets and connects up with the group on the right];B[kk] ;W[kj]C[Black is clearly going to lose]) (;B[ji]C[Black tries to stop White from linking with the group on the right.];W[gh]C[Strong as Black has no good reply.];B[hi]C[Blacks three stones are being driven];W[ih];B[hh];W[gg] ;B[ff]C[Black needs to play here because if he allows White to play here, the Black group on the left will be captured.];W[ig];B[hg];W[if];B[hf];W[jk];B[il] ;W[jh]C[Black's central group is clearly in danger now.])) (;B[ii]C[poor];W[hj]C[Black's group on the left becomes very weak])))
http://tchan001.wordpress.com
A blog on Asian go books, go sightings, and interesting tidbits
Go is such a beautiful game.
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