(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[0.50] AW[cb][db][ac][bc][kh][li][ql][mn][do][po][cq][dq][gq][rq][ar][er][fr][qr][qs]AB[aa][ba][da][ab][bb][bd][cd][dd][ae][af][cf][df][ag][dg][kg][bh][ch][lh][kk][bm][bo][mo][no][oo][fp][mp][pp][eq][fq][mq][pq][cr][dr][mr][nr][or][rr][sr][ms][rs][ss]TR[cr][dr]C[How can Black save the marked stones?] (;B[bq]CR[bq] (;W[br]CR[br] (;B[dp]CR[dp] ;W[cp]CR[cp] ;B[co]CR[co] ;W[ep]CR[ep] ;B[bp]CR[bp] ;W[dp]CR[dp] ;B[dn]CR[dn] ;W[eo]CR[eo] (;B[fo]CR[fo] ;W[en]CR[en] ;B[em]CR[em] ;W[fn]CR[fn] ;B[gn]CR[gn] ;W[fm]CR[fm] ;B[fl]CR[fl] ;W[gm]CR[gm] ;B[hm]CR[hm] ;W[gl]CR[gl] ;B[gk]CR[gk] ;W[hl]CR[hl] ;B[il]CR[il] ;W[hk]CR[hk] ;B[hj]CR[hj] ;W[ik]LB[ij:B][jk:A]CR[ik]C[ A or B? Please choose carefully!] (;B[jk]CR[jk] ;W[ij]CR[ij] ;B[ii]CR[ii] ;W[jj]LB[ji:B][kj:A]CR[jj]C[Again, A or B? If you haven't read a little further ahaed on your own, please play A, things will be clarer that way.] (;B[kj]CR[kj] ;W[ji]LB[jh:A][ki:B]CR[ji]C[The turning point. A will send the ladder to the bottom, B to the top. Only one move works!] (;B[ki]CR[ki] ;W[jh]CR[jh] ;B[ih]CR[ih] ;W[jg]CR[jg] ;B[jf]CR[jf] ;W[ig]CR[ig] ;B[hg]CR[hg] ;W[if]CR[if] ;B[ie]CR[ie] ;W[hf]CR[hf] ;B[gf]CR[gf] ;W[he]CR[he] ;B[hd]CR[hd] ;W[ge]CR[ge] ;B[fe]CR[fe] ;W[gd]CR[gd] ;B[gc]CR[gc] ;W[fd]CR[fd] (;B[ed]CR[ed] ;W[fc]CR[fc] ;B[fb]CR[fb] ;W[ec]CR[ec] (;B[eb]CR[eb] ;W[dc]CR[dc] ;B[cc]CR[cc] ;W[ca]CR[ca] ;B[bb]CR[bb] ;W[ea]CR[ea] ;B[ba]LB[mi:b][lj:w][mj:w][nj:b][lk:b][mk:w][nk:w][ok:b][ml:b][nl:w][ol:w][pl:b][nm:b][om:w]CR[ba]C[As usual, Go saves the day. Those of you who sent the ladder in the other direction (marked) shouldn't be too surprised that this leads to problems only.... RIGHT]) (;B[dc]CR[dc] ;W[eb]CR[eb])) (;B[fc]CR[fc] ;W[ed]CR[ed] (;B[ee]CR[ee] ;W[ec]CR[ec] ;B[eb]CR[eb] ;W[dc]CR[dc] ;B[cc]CR[cc] ;W[ca]CR[ca] ;B[bb]CR[bb] ;W[ea]CR[ea] ;B[ba]CR[ba] ;W[fb]LB[fc:A]CR[fb]C[B A was careless!]) (;B[ec]CR[ec] ;W[ee]CR[ee]))) (;B[jh]CR[jh] ;W[ki]CR[ki] ;B[mi]CR[mi] ;W[lj]LB[mj:B][lk:A]TR[mn]CR[lj]C[And a last 'A or B': The marked stone should help you with your decision...?!] (;B[lk]CR[lk] ;W[mj]CR[mj] ;B[nj]CR[nj] ;W[mk]CR[mk] ;B[ml]CR[ml] ;W[nk]CR[nk] ;B[ok]CR[ok] ;W[nl]CR[nl] ;B[nm]CR[nm] ;W[ol]CR[ol] ;B[pl]CR[pl] ;W[om]CR[om] ;B[pm]CR[pm] ;W[on]CR[on] (;B[nn]CR[nn] ;W[pn]CR[pn] ;B[qn]CR[qn] ;W[qo]CR[qo] ;B[ro]CR[ro] ;W[qp]CR[qp] ;B[qq]CR[qq] ;W[rp]CR[rp] ;B[sp]CR[sp] ;W[sq]CR[sq] ;B[rr]CR[rr] ;W[so]CR[so] ;B[sr]CR[sr] ;W[rn]CR[rn]C[Problems causes problems.....]) (;B[pn]CR[pn] ;W[nn]CR[nn])) (;B[mj]CR[mj] ;W[lk]CR[lk] ;B[ll]CR[ll] ;W[mk]CR[mk] ;B[nk]CR[nk] ;W[ml]CR[ml] ;B[mm]CR[mm] ;W[nl]CR[nl] ;B[ol]CR[ol] ;W[nm]CR[nm]))) (;B[ji]CR[ji] ;W[kj]CR[kj] ;B[lj]CR[lj] ;W[ki]CR[ki] ;B[mi]CR[mi] ;W[jh]CR[jh] ;B[ih]CR[ih] ;W[jg]CR[jg] ;B[jf]CR[jf] ;W[ig]CR[ig] ;B[hg]CR[hg] ;W[if]CR[if] ;B[ie]CR[ie] ;W[hf]CR[hf] ;B[gf]CR[gf] ;W[he]CR[he] ;B[hd]CR[hd] ;W[ge]CR[ge] ;B[fe]CR[fe] ;W[gd]CR[gd] ;B[gc]CR[gc] ;W[fd]CR[fd] (;B[fc]CR[fc] ;W[ed]CR[ed] ;B[ee]CR[ee] ;W[ec]CR[ec] ;B[eb]CR[eb] ;W[dc]CR[dc] ;B[cc]CR[cc] ;W[ca]CR[ca] ;B[bb]CR[bb] ;W[ea]CR[ea] ;B[ba]CR[ba] ;W[fb]LB[fc:A]CR[fb]C[B A was careless!]) (;B[ed]CR[ed] ;W[fc]CR[fc] ;B[fb]CR[fb] ;W[ec]CR[ec] ;B[eb]CR[eb] ;W[dc]CR[dc] ;B[cc]CR[cc] ;W[ca]CR[ca] ;B[bb]CR[bb] ;W[ea]CR[ea] ;B[ba]LB[mj:w][nj:b][mk:w][nk:w][ok:b][ml:b][nl:w][ol:w][pl:b][nm:b][om:w]CR[ba]C[As usual, Go saves the day. Those of you who sent the ladder in the other direction (marked) shouldn't be too surprised that this leads to problems only... RIGHT]))) (;B[ij]CR[ij] ;W[jk]CR[jk] ;B[jl]CR[jl] ;W[jj]CR[jj] ;B[ji]CR[ji] ;W[kj]CR[kj] ;B[lj]CR[lj] ;W[ki]CR[ki] ;B[mi]CR[mi] ;W[jh]CR[jh])) (;B[en]CR[en] ;W[fo]CR[fo]) (;B[fn]CR[fn] ;W[cs]CR[cs])) (;B[cp]CR[cp] ;W[dp]CR[dp])) (;W[bp]CR[bp] ;B[br]CR[br] ;W[cp]CR[cp] ;B[ap]CR[ap])) (;B[br]CR[br] ;W[bq]CR[bq]) (;B[dp]CR[dp] ;W[bq]CR[bq]))