Ogata Masaki 9D (Black) vs O Meien 9D (White) - 2016/04/14 6th Igo Masters Cup
(;AB[db]AB[eb]AB[fc]AB[gc]AB[gd]AB[ib]AB[jb]AW[ic]AW[jc]AW[kb]AW[lc]AB[ke]AB[kd]AW[kf]AW[le]AW[ld]AW[jf]AW[ie]AW[je]AB[lf]AB[mf]AB[kg]AB[lh]AW[jg]AB[jh]AB[ig]AB[if]AB[hf]AB[he]AB[ih]AW[hd]AW[ge]AW[fe]AW[fd]AW[ed]AW[dd]AW[dc]AW[cb]AB[ee]AW[cf]AW[nc]C[Black to get the best result]AW[ja]AP[goproblems]
(;B[id];W[jd];B[hc];W[kc]
(;B[id]C[Well doneRIGHT])
(;B[ha];W[fa]C[You still need to play the ko, but you've just used a local threat]TR[hd]))
(;B[hb];W[da]C[This is a dead shape, this path is to showcase the variation of the real game];B[id];W[jd];B[hc];W[kc]C[];B[id]C[This is what happened in the real game, but you have lost one local threat. (It was better for Black because he was sure to win the ko and he saved the marked stones this way)]TR[ib]TR[jb])
(;B[da];W[hb]TR[ie]TR[je]TR[jf]TR[jg]TR[kf]C[White can give up these stones to kill black or play the ko while Black has used up local threats (see solution for the ko)];B[id];W[hc];B[jd]C[Continuation])
(;B[hc];W[id]
(;B[hb];W[da]C[Black dies])
(;B[gb];W[fa]C[Black dies])
(;B[ha];W[fa]C[Black dies])
(;B[ga];W[da]C[Black dies])
(;B[ia];W[hb]C[Black dies])
(;B[fa];W[gb]C[Black dies])
(;B[da];W[fa]C[Black dies])
(;B[ca];W[bb]C[Black dies, see other variations]))
(;B[ia];W[hb]C[White can give up these stones to kill black or play the ko while Black has used up local threats (see solution for the ko)]TR[ie]TR[je]TR[jf]TR[jg]TR[kf];B[id];W[hc];B[jd]C[Continuation])
(;B[gb];W[fa]
(;B[hc];W[id]C[Black dies])
(;B[ga];W[id]C[Black dies])
(;B[ia];W[id]C[Black dies])
(;B[ha];W[hc]C[Black dies])
(;B[hb];W[id]C[Black dies])
(;B[da];W[id]C[Black dies])
(;B[id];W[jd];B[hc];W[kc];B[id]C[That's the ko, but you have just used local threats]))
(;B[ha];W[id]
(;B[fa];W[gb]C[Black dies])
(;B[gb];W[fa]C[Black dies])
(;B[hc];W[fa]C[Black dies])
(;B[da];W[fa]C[Black dies])
(;B[hb];W[fa]C[Black dies]))
(;B[ga];W[hb]C[White can give up these stones to kill black or play the ko while Black has used up local threats (see solution for the ko)]TR[ie]TR[je]TR[jf]TR[jg]TR[kf];B[id];W[hc];B[jd]C[Continuation])
(;B[fa];W[gb]
(;B[hb];W[da]C[Black dies])
(;B[hc];W[id]C[Black dies])
(;B[id];W[hc]TR[ie]TR[je]TR[jf]TR[jg]TR[kf]C[White can give up these stones to kill black or play the ko while Black has used up local threats (see solution for the ko)]))
(;B[jd];W[id]C[Black dies, check out the variations for continuations from here]))