Problem	4659
Created	2004-06-14
Source	from a game
Rating

Difficulty	4.7 kyu
Average Solve Time	105 secs
User Attempts	1313 / 4180
Solve Ratio Rating	4 kyu
	rating history

( ; FF[1] GM[1] SZ[19] AP[Jago:Version 4.53] AB[ba][bb][cb][db][dc][dd][ed][fd][fc][de][df][cf][bf][be][ae][bh][ch][ci][cj][dj][bj][aj][ck][cl][dl][el][dn][do][dp][cp][bp][bo][ao][bq][cq][eo][fo][fp][fn][fm][gm][gl][gk][hk][hl][hm][go][hn][in][ge][gf][ff][fg][eg][eh][fh][fi][hf][he][hd][ie][je][jd][ig][jg][hh][ih][jh][ji][kh][lh][lg][lf][kf][mf][me][md][mc][lc][lb][la][kb][ne][oe][pd][pc][qd][qe][re][rd][rc][qb][sb][kk][kl][ll][lm][lk][lj][mk][ml][nk][nj][ni][nh][oh][ph][pg][qh][qi][ri][rj][sj][pi][pj][pk][ok][pl][ql][rm][rn][sn][qn][pn][qo][qp][pp][qq][rq][rp][sp][mn][nn][ip][jp][kp][jq][jr][ir][lq][lr] AW[ca][da][ea][eb][ec][fb][gc][gd][hc][hb][ic][id][jc][jb][ja][ka][kc][kd][ke][le][ld][ee][ef][af][ag][ah][ai][bi][bg][cg][dg][dh][di][ei][ej][ek][dk][fj][fk][fl][em][en][bn][cn][co][gj][gi][gh][gg][hg][hi][hj][ii][ij][ik][il][im][jl][jk][jj][kj][ki][li][mi][mj][mh][mg][ng][nf][of][og][pf][pe][qf][qg][rf][sf][se][sd][sc][rh][sh][ap][aq][ar][br][cr][dq][eq][ep][fq][gp][hp][hq][hr][iq][ho][io][jn][km][ko][ln][lp][mp][mo][no][np][oo][op][on][om][ol][nl][pm][qm][mm][po][oq][pq][qr][rr][sr][sq][nr][so][si][qk][rk][sk][rl][kr][nc][od][oi] GN[problem3] C[black to move and win (japanese rules, no komi, no prisoners) please don´t make any unnecessary ko threats] ( ; B[sl] ; W[sm] ( ; B[rg] ( ; W[ro] C[white should not play here, but it makes the problem more interesting] ; B[sg] ; W[jm] ; B[jo] ; W[kn] ; B[lo] C[RIGHT][black wins big] ) ( ; W[sg] C[white should answer the ko threat] ; B[sl] ; W[rb] ; B[qj] ; W[sa] ; B[qa] ; W[sb] C[RIGHT][black wins by 8 points] ) ) ( ; B[sg] ( ; W[ro] C[white should not play here, but it makes the problem more interesting] ; B[rg] ; W[jm] ; B[jo] ; W[kn] ; B[lo] C[RIGHT][black wins big] ) ( ; W[rg] C[white should answer the ko threat] ; B[sl] ; W[rb] ; B[qj] ; W[sa] ; B[qa] ; W[sb] C[RIGHT][black wins by 8 points] ) ) ( ; B[ks] ; W[ro] C[your K3-group will live, but your O9-group is dead] ) ( ; B[gb] ; W[ro] C[your O9-group is dead] ) ( ; B[fa] ; W[ro] C[your O9-group is dead] ) ( ; B[is] ; W[ro] C[your K3-group will live, but your O9-group is dead] ) ( ; B[mr] ; W[ro] C[your K3-group will live, but your O9-group is dead] ) ) ( ; B[sm] C[Seki, white wins by 5 points] ) ( ; B[qj] ; W[oj] C[oops] ) ( ; B[ks] ; W[is] C[you cannot live here] ) ( ; B[oj] ; W[sl] C[Seki, white wins by 5 points] ) ( ; B[ro] ; W[sl] C[Seki, white wins by 5 points] ) ( ; B[is] ; W[ks] C[you cannot live here] ) ( ; B[mr] ; W[ks] C[you cannot live here] ) ( ; B[nm] ; W[mm] C[snapback] ) )