Problem	1145
Created	2001-11-02
Source	GTL game (variation)
Rating

Difficulty	8.1 kyu
Average Solve Time	77 secs
User Attempts	1471 / 4682
Solve Ratio Rating	4 kyu
	rating history

The game below has black winning by 0.5 points. Can you find an extra point for white?

( ; FF[4] GM[1] SZ[19] AP[Jago:Version 4.18] AB[ab][bb][bc][ea][fa][ga][ha][ia][fb][hb][ec][fc][gc][dd][ed][fd][hd][de][fe][ff][gf][gg][gh][hh][hi][ih][jh][kg][kd][jd][ie][jc][jb][ae][af][bf][bg][cg][bh][bi][ai][ci][cj][bk][cl][cm][bm][bn][bo][an][ej][ek][el][fl][gl][gm][gn][hk][ik][jk][jl][km][fo][fp][fq][fr][fs][gr][er][es][ds][cs][le][me][nd][oc][od][pd][pe][qe][qc][qb][pf][of][nf][og][ng][nh][lh][lg][mg][pi][pj][qj][rk][sl][sn][rn][ro][rm][ql][pl][ol][om][on][ok][nk][mk][nj][ln][lo][lp][jo][io][kp][kq][kr][lr][ls][ms][mj][or][oq][pp][po][lk] AW[so][sp][sq][rp][rr][pm][pn][qn][qo][qp][qq][pr][ns][nr][mr][lq][mq][nq][mp][np][op][oo][mo][mn][nn][nm][nl][ml][ll][kl][lm][ko][jp][ji][kh][ki][li][mi][mh][ni][oi][oj][oh][ph][pg][qf][rg][qi][ri][rj][si][sj][sk][re][rd][qd][pc][pb][ob][nc][mc][md][lc][kc][kb][ka][ja][gd][hg][ij][hj][gj][gk][fk][fj][gi][fh][fg][eg][ef][ee][ei][di][dh][ch][dg][df][cf][ce][be][ad][bd][cd][cc][dc][db][eb][da][cb][ba][ah][aj][dj][dk][ck][dl][dm][em][fm][fn][dn][cn][co][do][eo][dp][dq][eq][cq][dr][cr][br][bs][ar][aq][ap][ao][bp] C[White to play. If you think the game is finished play at 'a', (T19). Otherwise try to find an extra point.] LB[sa:a] GN[endgame02] ( ; W[sa] C[Black can still be made to fill in.] ) ( ; W[kk] ; B[jj] ( ; W[ii] ( ; B[kj] ( ; W[lj] ; B[jm] C[Black must fill in RIGHT] ) ( ; W[jm] ( ; B[kn] ( ; W[lj] ; B[hl] C[Black must fill RIGHT] ) ( ; W[hl] ; B[lj] C[Black connects.] ) ) ( ; ) ) ) ( ; ) ) ( ; W[kj] ; B[ii] ( ; W[fi] ; B[jm] C[Black wins since white also filled in.] ) ( ; W[jm] ; B[fi] C[Black accepts the gift] ) ) ( ; W[jm] ; B[ii] ( ; W[fi] ; B[kn] ( ; W[kj] ; B[hl] C[Both players have filled in, black wins.] ) ( ; W[hl] ; B[im] ; W[kj] ; B[il] ; W[in] ; B[hm] C[Black wins as both players have filled in a point.] ) ) ( ; W[kn] ; B[fi] C[Black wins.] ) ) ( ; W[hl] ; B[ii] ; W[fi] ; B[jm] C[Black wins.] ) ) ( ; W[jm] ; B[kn] ; W[kk] ; B[jj] ( ; W[ii] ; B[kj] ; W[lj] ; B[hl] C[Black must fill in RIGHT] ) ( ; W[kj] ; B[ii] ; W[fi] ; B[hl] C[Both fill in, black wins.] ) ( ; W[hl] ; B[ii] ; W[fi] ; B[im] ; W[kj] ; B[il] ; W[in] ; B[hm] C[Both have filled in, black wins.] ) ( ; W[il] ; B[hl] C[Black wins.] ) ) )