(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[Chris Oliver]PB[DDK]
(
;AW[gc][fd][gd][id][ge][he][bf][cf][dg][eg][dh][di][fi][ej][fj][jj][bk][ck][dk][gm][hm][cn][en][fn]
AB[eb][gb][fc][hc][ic][jc][dd][ed][hd][pd][ce][df][bg][cg][ch][ci][ei][cj][dj][pj][ek][el][em][fm][gn][qn][go][dp][pp][fq]
LB[em:8][fm:4][gm:3][hm:7][en:1][fn:5][gn:6][go:2]TR[el]C[Diagram 1 - White has his eye on the black group marked with a triangle.]
;W[dm]
;B[gl]
;W[hl]
;B[gk]
;W[fk]
;B[fl]LB[hj:A][ij:B][fk:13][gk:12][fl:14][gl:10][hl:11][dm:9]C[Diag 2]
(;W[hj]
;B[hk]
;W[ik]
;B[gj]
;W[gi]LB[gi:5][gj:4][hj:1][hk:2][ik:3]C[Diag 3])
(;W[ij]
(;B[hk]
;W[ik]
;B[gj]
;W[gi]
;B[dl]
;W[cl]LB[gi:5][gj:4][ij:1][hk:2][ik:3][cl:7][dl:6]C[Diag 4])
(;B[hj]
;W[hi]
;B[gi]
;W[gh]
;B[gj]
;W[fh]
;B[hk]
;W[ik]C[Diag 4 Var. 1])))
(
;AW[gc][fd][gd][id][ge][he][bf][cf][dg][eg][dh][di][fi][ej][fj][jj][bk][ck][dk][fk][hl][gm][hm][cn][dn][en][fn]
AB[eb][gb][fc][hc][ic][jc][dd][ed][hd][pd][ce][df][bg][cg][ch][ci][ei][cj][dj][pj][ek][gk][el][fl][gl][em][fm][gn][qn][go][dp][pp][fq]
;W[hj]
;B[hk]
;W[ik]
;B[gj]
;W[gi]
;B[hi]
(;W[hh]
;B[ij]
;W[ii]LB[hh:7][gi:5][hi:6][ii:9][gj:4][hj:1][ij:8][hk:2][ik:3]TR[dn]C[Diag 5])
(;W[ij]
;B[gh]
;W[fg]
;B[fh]))
(
;AW[gc][fd][gd][id][ge][he][bf][cf][dg][eg][dh][hh][di][fi][gi][ii][ej][fj][jj][bk][ck][dk][fk][ik][hl][gm][hm][cn][dn][en][fn]AB[eb][gb][fc][hc][ic][jc][dd][ed][hd][pd][ce][df][bg][cg][ch][ci][ei][hi][cj][dj][gj][ij][pj][ek][gk][hk][el][fl][gl][em][fm][gn][qn][go][dp][pp][fq]PL[B]
;B[il]
;W[hj]
;B[im]
;W[hn]
;B[ho]
;W[in]
;B[jn]
;W[io]
;B[ip]
;W[jo]
;B[ko]
;W[jp]
;B[jq]
;W[kp]
;B[lp]
;W[kq]
;B[kr]
;W[lq]
;B[mq]
;W[lr]
;B[mr]CR[hi][ij]LB[hj:2][il:1][im:3][hn:4][in:6][jn:7][ho:5][io:8][jo:10][ko:11][ip:9][jp:12][kp:14][lp:15][jq:13][kq:16][lq:18][mq:19][kr:17][lr:20][mr:21][ls:A]C[Diag 6])
(
;AW[gc][fd][gd][id][ge][he][bf][cf][dg][eg][dh][hh][di][fi][gi][ii][ej][fj][jj][bk][ck][dk][fk][ik][hl][gm][hm][cn][dn][en][fn]
AB[eb][gb][fc][hc][ic][jc][dd][ed][hd][pd][ce][df][bg][cg][ch][ci][ei][hi][cj][dj][gj][ij][pj][ek][gk][hk][el][fl][gl][em][fm][gn][qn][go][dp][pp][fq]PL[B]
;B[il]
;W[hj]
;B[hn]
;W[im]
;B[jm]
;W[in]
;B[io]
;W[jn]
;B[kn]
;W[jo]
;B[jp]
;W[ko]
;B[lo]
;W[kp]
;B[kq]
;W[lp]
;B[mp]
;W[lq]
;B[lr]
;W[mq]
;B[nq]
;W[mr]
;B[nr]
;W[ms]
;B[ns]LB[hj:2][il:1][jl:A][im:4][jm:5][hn:3][in:6][jn:8][kn:9][ln:F][nn:E][io:7][jo:10][ko:12][lo:13][jp:11][kp:14][lp:16][mp:17][jq:D][kq:15][lq:18][mq:20][nq:21][lr:19][mr:22][nr:23][ls:B][ms:24][ns:25]C[Diag 7])
(
;AW[gc][fd][gd][id][ge][he][bf][cf][dg][eg][dh][di][fi][ej][fj][jj][bk][ck][dk][fk][hl][dm][gm][hm][cn][en][fn]
AB[eb][gb][fc][hc][ic][jc][dd][ed][hd][pd][ce][df][bg][cg][ch][ci][ei][cj][dj][pj][ek][gk][el][fl][gl][em][fm][gn][qn][go][dp][pp][fq]
;W[gi]
;B[hj]
;W[hk]
;B[gj]
;W[ij]
;B[hi]
;W[hh]
;B[ii]
;W[ji]
;B[ih]
;W[ig]
;B[jh]
;W[kh]
;B[jg]
;W[jf]
;B[kg]
;W[lg]
;B[kf]
;W[ke]
;B[lf]
;W[mf]
;B[le]
;W[ld]
;B[me]
;W[ne]
;B[md]
;W[mc]
;B[nd]
;W[od]
;B[nc]
;W[nb]
;B[oc]
;W[oe]LB[nb:31][mc:27][nc:30][oc:32][md:26][nd:28][od:29][oe:33][hh:7][ih:10][gi:1][hi:6][ii:8][ji:9][gj:4][hj:2][ij:5][hk:3]TR[lc][kd][pd][je][if][hg][mg][gh][lh]C[Diag 8
Broken ladder with the "ladder breaker" already in place, and marked with a triangle. A possible continuation follows.]
;B[pb]
;W[ob]
;B[pc]
;W[pe]
;B[qe])
(
;AW[gc][fd][gd][id][ge][he][bf][cf][dg][eg][dh][hh][di][fi][gi][ii][ej][fj][hj][jj][bk][ck][dk][fk][ik][hl][gm][hm][cn][dn][en][fn]
AB[eb][gb][fc][hc][ic][jc][dd][ed][hd][pd][ce][df][bg][cg][ch][ci][ei][cj][dj][gj][pj][ek][gk][hk][el][fl][gl][il][em][fm][im][gn][qn][go][dp][pp][fq]
;W[kq]
;B[jp]
;W[oq]LB[hj:2][il:1][im:3][hn:A][jp:5][kq:4][nq:B][oq:6]C[Diagram 9 - white plays a ladder breaker]))
