this is the end of a H4 game, I (W) won by 3.5... However, seeing the game a bit later, I saw a move that would have grant black the victory ... see where ?
(;
AW[ca][ja][ka][sa][db][eb][ib][lb][rb][sb][ac][bc][cc][dc][hc][jc][lc][oc][rc][bd][gd][ld][qd][rd][sd][ae][be][ce][ge][le][re][bf][cf][gf][kf][mf][qf][rf][sf][gg][kg][mg][pg][qg][rg][ah][hh][ih][jh][lh][mh][qh][ai][bi][di][ei][gi][ki][li][mi][ni][bj][cj][ej][gj][hj][kj][mj][ck][ek][fk][gk][ik][rk][sk][cl][dl][hl][jl][ml][nl][ql][hm][jm][km][lm][nm][om][pm][qm][sm][fn][gn][hn][in][ln][mn][nn][qn][rn][bo][io][no][oo][qo][so][ap][bp][cp][hp][jp][kp][qp][rp][cq][hq][jq][rq][sq][br][cr][dr][fr][ir][kr][lr][cs][hs][is][ks]AB[da][ea][fa][ha][ia][la][ma][qa][ra][fb][hb][mb][qb][ec][fc][gc][mc][pc][qc][cd][dd][fd][md][od][pd][de][fe][me][pe][qe][af][df][ff][nf][pf][ag][bg][cg][fg][ng][og][sg][bh][ch][dh][eh][fh][gh][nh][ph][rh][sh][ci][fi][hi][ii][ji][oi][pi][qi][ri][aj][fj][jj][lj][nj][oj][pj][qj][rj][sj][ak][bk][jk][kk][lk][mk][nk][pk][qk][bl][el][gl][ol][pl][cm][dm][em][fm][gm][an][bn][cn][en][jn][kn][on][pn][ao][co][eo][fo][go][ho][ko][lo][mo][po][dp][gp][lp][np][op][pp][dq][fq][gq][kq][lq][nq][qq][er][gr][hr][mr][qr][rr][sr][ds][es][gs][ls][ms]N[in this H4 game, I (W) won by 3.5. However, seeing the game a bit later, I saw a move that would have grant black the victory ... see where ?]
(;B[ba];W[cb];B[ab]C[RIGHT now W can't push in B18. W lose his 5 points territory and Black gain one more point at A19... Black now wins by 2.5])
(;B[sl];W[rl])
(;B[ar];W[aq]
(;B[as];W[bs])
(;B[bs];W[as]))
(;B[js];W[jr])
(;B[jr];W[js])
(;B[dk];W[dj])
(;B[dj];W[dk])
(;B[rl];W[sl])
(;B[ip];W[iq])
(;B[iq];W[ip])
(;B[hd];W[ic]
(;B[he];W[hg])
(;B[hg];W[he]))
(;B[jb];W[kb])
(;B[kb];W[jb])
(;B[ij]C[that is just 'dame'...])
(;B[kl]C[that is just 'dame'...])
(;B[ll]C[that is just 'dame'...])
(;B[jo]C[that is just 'dame'...])
(;B[fl]C[that is just 'dame'...]))