(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[9]KM[0.00] PW[Blanc]PB[Noir]AW[ee][fe][ge][df][dg][eg][fg][fh][hh][gi]AB[ce][de][ef][ff][gf][cg][gg][ch][dh][eh][gh]TR[df][dg][eg][fg][fh]C[Black to play and kill the marked stones.] (;B[cf]CR[cf] ;W[fi]CR[fi] (;B[hi]CR[hi] ;W[ii]CR[ii] ;B[ei]CR[ei] ;W[hi]CR[hi] (;B[hg]CR[hg]C[RIGHT]) (;B[he]CR[he] ;W[hf]CR[hf]C['Oh no !' (black is dead)]) (;B[hf]CR[hf] ;W[he]CR[he]C[it seems that you choosed to not take the shortest way ..] (;B[if]CR[if] (;W[ig]CR[ig]C[CHOICE 'Oh no !' (black is dead) ]) (;W[ie]CR[ie]C[CHOICE] (;B[ig]CR[ig]C['Oh no !' (seki)]) (;B[hg]CR[hg] ;W[ig]CR[ig]C['Oh no !']) (;B[ih]CR[ih] ;W[ig]CR[ig]C['Oh no !' (black is dead)]))) (;B[ig]CR[ig] ;W[ie]CR[ie] (;B[if]CR[if]C['Oh no !' (seki)]) (;B[hg]CR[hg]C[RIGHT]) (;B[ih]CR[ih]C[RIGHT])) (;B[hg]CR[hg]C[RIGHT]))) (;B[ei]CR[ei] ;W[hi]CR[hi] (;B[hg]CR[hg] ;W[ig]CR[ig] ;B[hf]CR[hf] ;W[he]CR[he]C[White win the race.]) (;B[hf]CR[hf] ;W[he]CR[he] (;B[ig]CR[ig] ;W[hg]CR[hg] ;B[if]CR[if] ;W[ie]CR[ie]C[White win the race.]) (;B[if]CR[if] ;W[ie]CR[ie] (;B[ih]CR[ih] ;W[hg]CR[hg] ;B[ig]CR[ig] ;W[ii]CR[ii]C[White win the race.]) (;B[ig]CR[ig] (;W[ih]CR[ih]C[CHOICE White win the race.]) (;W[hg]CR[hg]C[CHOICE White win the race.]))) (;B[hg]CR[hg] ;W[ig]CR[ig]C[White win the race.])) (;B[ig]CR[ig] ;W[hg]CR[hg] ;B[hf]CR[hf] ;W[he]CR[he] ;B[if]CR[if] ;W[ie]CR[ie]C[White win the race.]))) (;B[fi]CR[fi] ;W[ei]CR[ei]C[This move was not usefull. You should use the more direct path to kill a group since it generate less ko-thread that the opponent can use against you.]) (;B[hg]CR[hg] ;W[ig]CR[ig] ;B[hf]CR[hf] ;W[he]CR[he]C['Oh no !' (black is dead)]) (;B[ei]CR[ei] ;W[hg]CR[hg] (;B[fi]CR[fi] ;W[hf]CR[hf]C['Oh no !']) (;B[hf]CR[hf] ;W[he]CR[he] ;B[if]CR[if] ;W[ie]CR[ie]C['Oh no !' (black is dead)]) (;B[cf]CR[cf] ;W[hf]CR[hf]C['Oh no !'])) (;B[ih]CR[ih] ;W[hg]CR[hg] ;B[hf]CR[hf] ;W[if]CR[if] ;B[he]CR[he] ;W[hd]CR[hd]C['Oh no !' (black is dead)]) (;B[hf]CR[hf] (;W[hi]TR[cf]CR[hi]C[CHOICE Please play in C4.] ;B[cf]CR[cf] ;W[fi]CR[fi]C[Now try to win the capturing race...] (;B[hd]CR[hd] ;W[he]CR[he] ;B[ie]CR[ie] ;W[gd]CR[gd] (;B[gc]CR[gc] ;W[hg]CR[hg] ;B[if]CR[if] ;W[ig]CR[ig] ;B[id]CR[id] ;W[hc]CR[hc]C[Black is dead.]) (;B[hc]CR[hc] ;W[hg]CR[hg] ;B[if]CR[if] ;W[id]CR[id] ;B[ic]CR[ic] ;W[ig]CR[ig] ;B[id]CR[id] ;W[gc]CR[gc]C[Black is dead.])) (;B[he]CR[he] ;W[hd]CR[hd] (;B[hc]CR[hc] ;W[gd]CR[gd] ;B[id]CR[id] ;W[ie]CR[ie] (;B[ic]CR[ic] ;W[hg]CR[hg] ;B[if]CR[if] ;W[ig]CR[ig] ;B[ie]CR[ie] ;W[gc]CR[gc]C[Black is dead.]) (;B[if]CR[if] ;W[ig]CR[ig] (;B[ic]CR[ic] ;W[hg]CR[hg] ;B[ie]CR[ie] ;W[gc]CR[gc]C[Black is dead.]) (;B[gc]CR[gc] ;W[hg]CR[hg]C[Black is dead.]) (;B[ie]CR[ie] ;W[hg]CR[hg] ;B[ic]CR[ic] ;W[gc]CR[gc]C[Black is dead.]))) (;B[gd]CR[gd] ;W[gc]CR[gc] (;B[fd]CR[fd] ;W[ed]CR[ed] ;B[fc]CR[fc] ;W[ec]CR[ec] ;B[fb]CR[fb] ;W[hc]CR[hc] ;B[eb]CR[eb] ;W[dc]CR[dc] ;B[cc]CR[cc]C[RIGHT Black win the capture race.]) (;B[ed]CR[ed] ;W[fd]CR[fd] ;B[fc]CR[fc] ;W[gd]CR[gd] ;B[gb]CR[gb] (;W[id]CR[id]C[Black lose the capture race.]) (;W[fb]CR[fb]C[White should not have played this. To punish him, you need to find the 'karma tesuji' ...] (;B[ec]CR[ec] ;W[hb]CR[hb] ;B[id]CR[id] ;W[hc]CR[hc]C[Black is dead ]) (;B[id]CR[id] (;W[hc]CR[hc]C[CHOICE] (;B[hb]CR[hb] ;W[ec]CR[ec] ;B[ic]CR[ic] ;W[dd]CR[dd]C[... You found it :-)] (;B[ig]CR[ig] (;W[ih]CR[ih]C[CHOICE] ;B[ie]CR[ie] ;W[ib]CR[ib] ;B[ia]CR[ia] ;W[hg]CR[hg] ;B[ei]CR[ei] ;W[if]CR[if] ;B[ib]CR[ib] ;W[ga]CR[ga] ;B[ig]CR[ig]C[RIGHT Let's say that black win the ko.]) (;W[ie]CR[ie]C[CHOICE] (;B[ih]CR[ih]C[RIGHT Black win (easy problem, isn't it ? :-))]) (;B[ib]CR[ib] ;W[ih]CR[ih] ;B[if]CR[if] ;W[hg]CR[hg] ;B[ie]CR[ie] ;W[ga]CR[ga] (;B[ha]CR[ha] ;W[fa]CR[fa]C[Seki.]) (;B[ei]CR[ei]C[RIGHT What a easy problem. I am sure every beginners found this variation.])))) (;B[hg]CR[hg] ;W[ih]CR[ih] (;B[ie]CR[ie] (;W[ig]CR[ig] ;B[ib]CR[ib] ;W[ga]CR[ga] ;B[ha]CR[ha] ;W[fa]CR[fa]C[Seki. The gods didn't heard your requests.]) (;W[ib]CR[ib] (;B[ei]CR[ei] ;W[ig]CR[ig] ;B[ia]CR[ia] ;W[ga]CR[ga]C[White wins the capturing race.]) (;B[ia]CR[ia] ;W[ig]CR[ig] ;B[ga]CR[ga] ;W[fa]CR[fa]C[Seki. Hey ! you are able to solve this easy problem ? what's wrong with you ? :-)]))) (;B[ei]CR[ei] ;W[ie]CR[ie] ;B[if]CR[if] ;W[ib]CR[ib] ;B[ia]CR[ia] ;W[ga]CR[ga]C[White wins the capturing race.])) (;B[ie]CR[ie] ;W[ig]CR[ig] (;B[hg]CR[hg] ;W[ih]CR[ih] (;B[ga]CR[ga] ;W[ib]CR[ib] ;B[ia]CR[ia] ;W[fa]CR[fa]C[Seki. (Shame on you to not be able to solve this easy and trivial problem)]) (;B[ib]CR[ib] ;W[ga]CR[ga] (;B[ei]CR[ei] ;W[ha]CR[ha]C[Black is dead.]) (;B[ha]CR[ha] ;W[fa]CR[fa]C[Seki. (Shame on you to not be able to solve this easy and trivial problem)]))) (;B[if]CR[if] ;W[hg]CR[hg] ;B[ib]CR[ib] ;W[ga]CR[ga]C[Black is dead.]) (;B[ih]CR[ih] ;W[hg]CR[hg] (;B[ei]CR[ei] ;W[ib]CR[ib] ;B[ia]CR[ia] ;W[ga]CR[ga]C[Black is dead.]) (;B[ib]CR[ib] ;W[ga]CR[ga] ;B[ha]CR[ha] ;W[fa]CR[fa]C[Seki. (Shame on you to not be able to solve this easy and trivial problem)]))) (;B[if]CR[if] ;W[ig]CR[ig] ;B[ie]CR[ie] ;W[hg]CR[hg] ;B[ib]CR[ib] ;W[ga]CR[ga]C[Black is dead.])) (;B[ec]CR[ec] ;W[hb]CR[hb]C[Black is dead.])) (;W[ec]CR[ec]C[CHOICE] ;B[hc]CR[hc] ;W[dd]CR[dd] ;B[ig]CR[ig] (;W[ih]CR[ih] ;B[ie]CR[ie] (;W[hg]CR[hg]C[CHOICE] ;B[ei]CR[ei] ;W[if]CR[if] ;B[ic]CR[ic] ;W[hb]CR[hb] ;B[ig]CR[ig]C[RIGHT Let's say that black win the ko.]) (;W[ic]CR[ic]C[CHOICE] ;B[ib]CR[ib] ;W[hg]CR[hg] ;B[ei]CR[ei] ;W[if]CR[if] ;B[ic]CR[ic] ;W[ga]CR[ga] ;B[ig]CR[ig]C[RIGHT Let's say that black win the ko.])) (;W[hg]CR[hg] ;B[ih]CR[ih]C[RIGHT Black win the capture race.])))))))) (;W[he]CR[he]C[CHOICE] ;B[cf]CR[cf] ;W[fi]CR[fi] (;B[hi]CR[hi] ;W[ii]CR[ii] ;B[ei]CR[ei] ;W[hi]CR[hi] (;B[if]CR[if] ;W[ig]CR[ig]C['Oh no !' (black is dead)]) (;B[ig]CR[ig] ;W[ie]CR[ie] (;B[hg]CR[hg]C[RIGHT]) (;B[ih]CR[ih]C[RIGHT])) (;B[hg]CR[hg]C[RIGHT])) (;B[ei]CR[ei] ;W[hi]CR[hi] (;B[hg]CR[hg] ;W[ig]CR[ig]C['Oh no !' (black is dead)]) (;B[ig]CR[ig] ;W[hg]CR[hg] ;B[if]CR[if] ;W[ie]CR[ie]C['Oh no !' (black is dead)]) (;B[if]CR[if] ;W[ig]CR[ig]C['Oh no !' (black is dead)])))) (;B[hi]CR[hi] ;W[ii]CR[ii] ;B[cf]CR[cf] ;W[fi]CR[fi] ;B[ei]CR[ei] ;W[hi]CR[hi] (;B[hg]CR[hg]C[RIGHT]) (;B[if]CR[if] ;W[hf]CR[hf] ;B[hg]CR[hg] ;W[ig]CR[ig]C['Oh no !'])) (;B[ii]CR[ii] ;W[hf]CR[hf]C['Oh no']))