(;AW[la]AW[lb]AW[lc]AB[ma]AB[mb]AB[mc]AB[oc]AB[ld]AB[le]AW[md]AW[me]AW[lf]AW[ic]AW[hb]AW[ha]AW[gc]AW[gb]AB[ga]AB[fa]AB[fb]AB[fc]AB[fd]AW[hd]AW[he]AW[ge]AW[ie]AB[gd]AB[fe]AB[gf]AW[gg]AB[fg]AB[fh]AB[lh]AB[kf]LB[kf:1]C[White to play.]AB[ob]AP[goproblems]
(;W[kd];B[ke];W[kg];B[lg])
(;W[je];B[ke])
(;W[jf];B[ke];W[kg];B[lg]
(;W[je];B[mf])
(;W[kd];B[mf])
(;W[jd];B[mf])
(;W[jb];B[mf])
(;W[kc];B[mf])
(;W[kb];B[mf])
(;W[jc];B[mf])
(;W[mf];B[kc]
(;W[jb];B[kb])
(;W[ka];B[ja])
(;W[kb];B[jb])
(;W[ja];B[ka];W[kb];B[jb])
(;W[jc];B[kb])
(;W[je];B[kd]
(;W[kb];B[jb])
(;W[ja];B[ka];W[kb];B[jb])
(;W[jb];B[kb])
(;W[ka];B[ja]))
(;W[kd];B[jd]
(;W[kb];B[jb])
(;W[je];B[kd]
(;W[kb];B[jb])
(;W[ja];B[ka];W[kb];B[jb])
(;W[jb];B[kb])
(;W[ka];B[ja]))
(;W[jb];B[kb])
(;W[ka];B[ja])
(;W[ja];B[ka];W[kb];B[jb]))))
(;W[kg];B[mf];W[lg];B[ne])
(;W[ke];B[kd]
(;W[je]
(;B[mf])
(;B[kc]
(;W[kb];B[jb])
(;W[ja];B[ka];W[kb];B[jb])
(;W[ka];B[ja])
(;W[jb];B[kb])))
(;W[kc];B[jd]
(;W[mf];B[je]
(;W[kg];B[jg])
(;W[jg];B[kg])
(;W[jf];B[jg]))
(;W[lg];B[je]
(;W[kg];B[jg])
(;W[jf];B[kg]))
(;W[kg];B[mf]))
(;W[jd];B[kc];W[kb];B[je];W[jc];B[ke];W[kg];B[jf]
(;W[ig];B[mf])
(;W[if];B[jg];W[jh];B[ig]
(;W[hg];B[ih];W[ii];B[hh];W[gh];B[hi];W[hj];B[gi])
(;W[ih];B[hg];W[hh];B[gh]))
(;W[jg];B[if]
(;W[ig];B[hf])
(;W[hf];B[ig];W[ih]C[spiral ladderRIGHT]))))
(;W[mf];B[ke]TR[kg]TR[kc])
(;W[lg];B[kg];W[ke];B[kd]
(;W[je];B[kc])
(;W[jd];B[je];W[kc];B[ke])))