(;SZ[19]AW[ha]AW[na]AW[hb]AW[kb]AW[lb]AW[mb]AW[ob]AW[qb]AW[hc]AW[nc]AW[hd]AW[id]AW[nd]AW[qd]AW[rd]AW[sd]AW[je]AW[pe]AW[hf]AW[jf]AW[of]AW[qf]AB[ia]AB[pa]AB[ra]AB[ib]AB[pb]AB[rb]AB[ic]AB[kc]AB[mc]AB[oc]AB[qc]AB[rc]AB[sc]AB[jd]AB[od]AB[pd]AB[ke]AB[me]AB[ne]AB[oe]AB[kf]AB[mf]C[White invaded the upper side. Black fought back; but there may be weaknesses White can exploit...]FF[4]GM[1]AP[Jago:Version 4.43]PL[W]GN[VANCOUVR] (;W[ja];B[jc] (;W[lc];B[md] (;W[jb];B[kd] (;W[la];B[nb] (;W[nc]LB[jb:A]LB[kd:B]C[ Good move, playing at A -- using sente to eliminate the bigger Black ko threat at B.RIGHT]) (;W[oa];B[ma];W[na];B[oa]) (;W[ld];B[oa])) (;W[nb];B[la])) (;W[ld];B[kd];W[la];B[nb] (;W[nc];B[jb]LB[ka:A]LB[nb:B]C[A and B are false eyes.]) (;W[jb];B[oa])) (;W[la]LB[jb:B]LB[kd:A]C[ When Black connects A, White lives with B.RIGHT])) (;W[ld];B[kd] (;W[lc];B[md] (;W[la];B[jb]) (;W[nb];B[la] (;W[le];B[lf]) (;W[jb]C[White has only one eye.])) (;W[jb];B[la])) (;W[jb];B[la] (;W[md];B[lc]) (;W[lc];B[md]) (;W[le];B[lf]) (;W[nb]C[White is dead; only one eye])) (;W[la];B[jb])) (;W[jb];B[lc] (;W[nb];B[la]) (;W[md];B[la]) (;W[la]C[RIGHT])) (;W[la];B[lc];W[jb]C[RIGHT])) (;W[la];B[jb] (;W[ld];B[kd];W[md];B[lc];W[ja];B[jc];W[nb];B[sd]LB[ka:B]LB[ma:A]C[White is dead; only one eye (at A -- B is a false eye).]) (;W[lc];B[md] (;W[kd];B[ld];W[ja];B[ka]C[White can live without ko]) (;W[ld];B[kd];W[nb]LB[ka:B]LB[ma:A]C[White is dead -- only one eye (at A... B cannot be more than a false eye).]))) (;W[jb];B[jc] (;W[ja];B[md]PL[W] (;W[la]C[RIGHT]) (;W[lc];B[kd];W[la]C[RIGHT];B[nb] (;W[nc]C[RIGHT]) (;W[oa];B[ma]) (;W[ld];B[oa])) (;W[nb];B[la])) (;W[lc];B[md] (;W[ld];B[kd] (;W[ja];B[la]) (;W[la];B[ja]) (;W[le];B[lf] (;W[nb];B[ja]C[Black can tenuki instead]) (;W[la];B[ja]) (;W[ja];B[la]) (;W[oa];B[ja]LB[nb:A]C[Note that A is not an eye]))) (;W[kd];B[ld];W[ja];B[kd];W[la]C[ Roundabout; but I guess it worksRIGHT];B[nb];W[nc]C[RIGHT]) (;W[ja];B[kd] (;W[la];B[nb] (;W[nc]C[RIGHT]) (;W[oa];B[ma];W[na];B[oa])) (;W[nb];B[la]) (;W[ld];B[la])) (;W[nb];B[kd]) (;W[le];B[kd] (;W[ja];B[la]) (;W[la];B[ja]) (;W[ka]C[It is hard to make two eyes, if you destroy your own eyespace.]) (;W[nb];B[la]C[White dies even if Black plays tenuki here.])) (;W[la];B[ja]) (;W[ka]C[Destroying your own eyespace does not help.])) (;W[ld];B[kd] (;W[md];B[lc] (;W[ja];B[la]) (;W[la];B[ja]) (;W[le];B[lf];W[ja];B[la]) (;W[oa];B[la]LB[nb:A]C[Black can even play elsewhere; A is a false eye])) (;W[lc];B[md] (;W[ja];B[la]) (;W[la];B[ja]) (;W[nb];B[ja]C[Even if Black plays elsewhere, White will die])) (;W[ja];B[la] (;W[md];B[lc]) (;W[lc];B[md]) (;W[le];B[lf]) (;W[nb]C[White is dead; only one eye]))) (;W[la];B[ja];W[ld];B[md])) (;W[lc];B[md] (;W[ja];B[jc] (;W[la]C[RIGHT]) (;W[jb];B[kd];W[la];B[nb] (;W[nc]C[RIGHT]) (;W[oa];B[ma];W[na];B[oa]) (;W[ld];B[oa])) (;W[ld];B[kd] (;W[la];B[jb]) (;W[jb];B[la]) (;W[ka]C[You cannot make two eyes when you destroy your own eyespace.]) (;W[nb];B[la]C[White is dead even if Black plays tenuki instead.] (;W[le];B[lf]) (;W[jb]C[White has only one eye.])))) (;W[ld];B[kd] (;W[le];B[lf] (;W[nb];B[jb]C[White dies even if Black plays elsewhere]) (;W[ja];B[jc] (;W[la];B[jb]) (;W[jb];B[la]) (;W[nb];B[la]C[White dies even if Black plays elsewhere])) (;W[jb];B[jc] (;W[nb];B[ja]C[Black can tenuki instead]) (;W[la];B[ja]) (;W[ja];B[la]) (;W[oa];B[ja]LB[nb:A]C[Note that A is not an eye])) (;W[jc];B[jb] (;W[la];B[jc]C[Black can tenuki instead]) (;W[ka]C[Filling your own potential eye will not help]) (;W[ja];B[jc]C[White has only one eye]) (;W[nb];B[jc]C[Actually, Black should tenuki here])) (;W[la];B[ja])) (;W[lf];B[le]) (;W[ja];B[jc] (;W[jb];B[la]) (;W[la] (;B[nb] (;W[nc];B[jb]) (;W[jb];B[oa]) (;W[le];B[lf])) (;B[jb])) (;W[le];B[lf] (;W[nb];B[la]) (;W[jb];B[la]))) (;W[jb];B[jc] (;W[la];B[ja]) (;W[ja];B[la]) (;W[nb];B[ja]C[White cannot make two eyes even if Black plays tenuki this move.]) (;W[ka]C[You cannot live if you destroy your own eyespace. Talk about dying in gote...]) (;W[le];B[lf] (;W[nb];B[ja]C[Black can tenuki instead]) (;W[la];B[ja]) (;W[ja];B[la]) (;W[oa];B[ja]LB[nb:A]C[Note that A is not an eye])))) (;W[nb];B[la] (;W[kd];B[ld] (;W[jc];B[jb];W[ka];B[kd];W[ja];B[jc]) (;W[jb];B[jc];W[ja];B[kd]) (;W[ja];B[jc];W[jb];B[kd])) (;W[jb];B[jc];W[ja];B[kd]) (;W[ja];B[jc];W[ld];B[kd] (;W[le];B[lf]) (;W[jb]C[White has only one eye.]))) (;W[jb];B[jc] (;W[ld];B[kd] (;W[le];B[lf] (;W[ja];B[la]) (;W[la];B[ja]) (;W[ka]C[White is dead; only one eye])) (;W[ja];B[la]) (;W[ka]C[White is dead; only one eye]) (;W[la];B[ja]) (;W[nb];B[ja]C[(Actually, Black can tenuki and still kill White)])) (;W[ja];B[kd];W[la]C[RIGHT];B[nb] (;W[nc]C[RIGHT]) (;W[oa];B[ma]) (;W[ld];B[oa]))) (;W[kd];B[ld] (;W[jb];B[jc] (;W[ja];B[kd];W[la]C[RIGHT];B[nb];W[nc]C[RIGHT]) (;W[la];B[ja]) (;W[ka]C[Oops - you destroyed your own eyespace. Now you cannot make two eyes.])) (;W[ja];B[jc] (;W[la]C[RIGHT];B[nb];W[nc]C[RIGHT]) (;W[jb];B[kd];W[la]C[RIGHT];B[nb];W[nc]C[RIGHT])) (;W[nb];B[la] (;W[jc];B[jb];W[ja];B[ka];W[ma];B[oa]) (;W[jb];B[jc];W[ja];B[kd]) (;W[ja];B[jc];W[jb];B[kd]))) (;W[jc];B[jb] (;W[ja];B[ka];W[la];B[kd]) (;W[ld];B[kd];W[nb];B[jc]C[Black can even tenuki this move, and White still cannot get two eyes.])) (;W[la] (;B[jb] (;W[ld];B[kd];W[nb]LB[ka:B]LB[ma:A]C[White is dead -- only one eye (at A... B cannot be more than a false eye).]) (;W[nb];B[kd]) (;W[kd];B[ld];W[ja];B[ka]C[White can live without ko]) (;W[ja];B[ka]C[Find a better way. White can live without resorting to ko.])) (;))) (;W[ld];B[kd] (;W[md];B[lc] (;W[jb];B[jc] (;W[la];B[ja]) (;W[ja];B[la]) (;W[le];B[lf];W[ja];B[la])) (;W[jc];B[jb]) (;W[ja];B[jc] (;W[la];B[jb]) (;W[jb];B[la]))) (;W[lc];B[md] (;W[nb];B[ja] (;W[ka];B[jc]) (;W[jc];B[jb];W[ka];B[jc]C[White is dead; only one eye])) (;W[jb];B[jc] (;W[la];B[ja]) (;W[ja];B[la]))) (;W[jb];B[jc] (;W[ja];B[la] (;W[md];B[lc]) (;W[lc];B[md]) (;W[le];B[lf]) (;W[nb]C[White is dead; only one eye])) (;W[lc];B[md] (;W[ja];B[la]) (;W[la];B[ja]) (;W[nb];B[la] (;W[ja]C[White is dead; only one eye]) (;W[le];B[lf] (;W[ka]C[White is dead; only one eye]) (;W[ja]C[White is dead; only one eye])))) (;W[la];B[ja]) (;W[nb];B[ja]C[Actually, Black can tenuki and White will still die.])) (;W[jc];B[jb] (;W[lc];B[md];W[nb];B[jc]C[Black can even tenuki this move, and White still cannot get two eyes.]) (;W[md];B[lc]) (;W[ja];B[jc]) (;W[ka];B[md]C[Black can even tenuki; White still cannot make two eyes.])) (;W[ja];B[jc] (;W[jb];B[la] (;W[md];B[lc]) (;W[lc];B[md]) (;W[le];B[lf]) (;W[nb]C[White is dead; only one eye])) (;W[la];B[jb]) (;W[md];B[lc] (;W[la];B[jb];W[nb];B[sd]LB[ka:B]LB[ma:A]C[White is dead; only one eye (at A -- B is a false eye).]) (;W[jb];B[la]) (;W[nb];B[la]C[Actually, White is dead even if Black plays tenuki.])) (;W[lc];B[md] (;W[nb];B[la]C[Black can even tenuki this move, and White still dies.] (;W[le];B[lf]) (;W[jb]C[White has only one eye.])) (;W[jb];B[la]) (;W[la];B[jb])) (;W[nb];B[la]C[Black does not even need this move; White dies anyway.] (;W[lc];B[md]) (;W[md];B[lc]))) (;W[la];B[jb];W[md];B[lc];W[ja];B[jc];W[nb];B[sd]LB[ka:B]LB[ma:A]C[White is dead; only one eye (at A -- B is a false eye).])) (;W[kd];B[ld] (;W[jb];B[jc] (;W[lc];B[md] (;W[nb];B[ja]) (;W[ja];B[kd];W[la]C[RIGHT];B[nb];W[nc]C[RIGHT])) (;W[ja];B[lc];W[la]C[RIGHT]) (;W[la];B[lc];W[ja]C[RIGHT])) (;W[ja];B[jc];W[jb];B[oa] (;W[lc];B[kd];W[md];B[nb]C[White can live without ko]) (;W[nb];B[lc];W[la]C[RIGHT])) (;W[lc];B[md] (;W[ja];B[jc] (;W[la];B[nb];W[nc]C[RIGHT]) (;W[jb];B[kd];W[la]C[RIGHT];B[nb];W[nc]C[RIGHT])) (;W[nb];B[la] (;W[jc];B[jb];W[ka];B[kd];W[ja];B[jc]) (;W[jb];B[jc];W[ja];B[kd]) (;W[ja];B[jc];W[jb];B[kd])) (;W[jb] (;B[jc] (;W[la];B[ja]) (;W[ja];B[kd];W[la];B[nb];W[nc]C[RIGHT])) (;)) (;W[jc];B[jb] (;W[la];B[jc]) (;W[ja];B[ka];W[la];B[kd])))) (;W[jc];B[jb] (;W[ld];B[kd] (;W[lc];B[md];W[nb];B[jc]C[Black can even tenuki this move, and White still cannot get two eyes.]) (;W[nb];B[jc]C[White is dead. (Actually, Black can tenuki, and White is still dead -- only one eye.)]) (;W[md];B[lc]) (;W[la];B[md]C[White is dead. (Black can even tenuki this move, and White still cannot make two eyes.)])) (;W[lc];B[md] (;W[kd];B[ld] (;W[ja];B[ka];W[la];B[kd]) (;W[ka];B[kd]C[White has only one eye])) (;W[ld];B[kd];W[nb];B[jc]C[Black can even tenuki this move, and White still cannot get two eyes.]) (;W[ja];B[ka];W[la];B[kd] (;W[ja];B[jc]C[Only one eye, at A (B and C are false eyes).]LB[ma:a]LB[ka:b]LB[nb:c]) (;W[ld];B[lf]C[Running away will not work. White can live inside.]))) (;W[kd];B[ld];W[lc];B[md];W[la];B[kd]) (;W[md];B[lc] (;W[ld];B[kd]) (;W[ka];B[ld]C[Black can even tenuki this move, and White still will not get two eyes.])) (;W[ja];B[ka] (;W[lc];B[md] (;W[la];B[kd] (;W[ja];B[jc]C[Only one eye, at A (B and C are false eyes).]LB[ma:a]LB[ka:b]LB[nb:c]) (;W[ld];B[lf]C[Running away will not work. White can live inside.])) (;W[ld];B[kd] (;W[la];B[jc]) (;W[le];B[lf]C[Only one eye, so White dies.])) (;W[kd];B[ld];W[la];B[kd])) (;W[la];B[lc] (;W[ja];B[jc]) (;W[md];B[ld]) (;W[ld];B[md]) (;W[kd];B[ld];W[ja];B[jc])) (;W[ld];B[kd] (;W[la];B[jc]) (;W[lc];B[md] (;W[la];B[jc]) (;W[le];B[lf]C[Only one eye, so White dies.])) (;W[md];B[lc]) (;W[le];B[lf])) (;W[kd];B[ld];W[la];B[lc];W[ja];B[jc]))) (;W[le];B[md] (;W[ld];B[kd];W[ja];B[jc];W[la];B[jb]) (;W[lc];B[kd] (;W[jb];B[jc] (;W[ja];B[la]) (;W[la];B[ja]) (;W[ka]C[It is hard to make two eyes, if you destroy your own eyespace.]) (;W[nb];B[la]C[White dies even if Black plays tenuki here.])) (;W[ja];B[jc] (;W[jb];B[la]) (;W[la];B[jb]) (;W[nb];B[la]C[Actually, White dies even if Black plays elsewhere.]) (;W[ld];B[lf]C[Running away does not help... White must live inside.] (;W[nb];B[la]) (;W[jb];B[la])) (;W[ka]LB[nb:A]C[Destroying your own eyespace will not help. A is not an eye.]) (;W[ma]C[You certainly cannot live if you destroy your own eyespace.])) (;W[jc];B[jb] (;W[la];B[ld]C[White is dead even if Black tenuki.]) (;W[ka]C[You will not get two eyes that way.]) (;W[ja];B[jc]) (;W[ld];B[lf]C[White can live inside -- running away will not work.] (;W[la];B[jc]C[Black can tenuki instead]) (;W[ka]C[Filling your own potential eye will not help]) (;W[ja];B[jc]C[White has only one eye]) (;W[nb];B[jc]C[Actually, Black should tenuki here]))) (;W[la];B[jb]) (;W[ka];B[jc]C[Now that you have destroyed the White eyespace, Black can even tenuki instead.]) (;W[ld];B[lf] (;W[nb];B[jb]C[White dies even if Black plays elsewhere]) (;W[ja];B[jc] (;W[la];B[jb]) (;W[jb];B[la]) (;W[nb];B[la]C[White dies even if Black plays elsewhere])) (;W[jb];B[jc] (;W[nb];B[ja]C[Black can tenuki instead]) (;W[la];B[ja]) (;W[ja];B[la]) (;W[oa];B[ja]LB[nb:A]C[Note that A is not an eye])) (;W[jc];B[jb] (;W[la];B[jc]C[Black can tenuki instead]) (;W[ka]C[Filling your own potential eye will not help]) (;W[ja];B[jc]C[White has only one eye]) (;W[nb];B[jc]C[Actually, Black should tenuki here])) (;W[la];B[ja])) (;W[nb];B[la]C[White dies even if Black tenuki])) (;W[jb];B[jc] (;W[ja];B[la] (;W[lc];B[kd]) (;W[nb];B[lc]C[Actually, White dies even if Black tenuki])) (;W[la];B[ja]) (;W[lc];B[kd] (;W[ja];B[la]) (;W[la];B[ja]) (;W[nb];B[la]C[Actually, Black can tenuki and still kill])) (;W[nb];B[lc]C[White dies even if Black plays elsewhere]) (;W[ld];B[lc] (;W[ja];B[la]) (;W[la];B[ja]))) (;W[jc];B[jb] (;W[la];B[lc]C[White dies even if Black tenuki]) (;W[lc];B[ld] (;W[ka];B[kd]) (;W[ja];B[ka];W[la];B[jc]) (;W[la];B[kd]C[White dies even if Black plays elsewhere.])) (;W[ja];B[jc] (;W[lc];B[kd]C[White has only one eye]) (;W[la]LB[nb:A]LB[ka:B]C[White has only one eye. A and B cannot become eyes for White.]))) (;W[ja];B[jc] (;W[la];B[jb]) (;W[jb];B[la] (;W[lc];B[kd]) (;W[nb];B[lc]C[Actually, White dies even if Black tenuki])) (;W[lc];B[la])) (;W[la];B[jb]) (;W[ka];B[jc])) (;W[ka];B[lc] (;W[jb];B[jc]) (;W[jc];B[jb] (;W[ja];B[jc]) (;W[nb];B[jc]C[White dies even if Black plays elsewhere.])) (;W[nb];B[jc]C[White dies even if Black plays tenuki.]) (;W[md];B[ld]) (;W[ja];B[jc]) (;W[ld];B[kd])) (;W[nb];B[la] (;W[ld];B[kd] (;W[jb];B[jc] (;W[lc];B[md] (;W[ja]C[White is dead; only one eye]) (;W[le];B[lf] (;W[ka]C[White is dead; only one eye]) (;W[ja]C[White is dead; only one eye]))) (;W[md];B[lc])) (;W[ja];B[jc] (;W[lc];B[md] (;W[le];B[lf]) (;W[jb]C[White has only one eye.])) (;W[md];B[lc])) (;W[jc];B[jb] (;W[lc];B[md]) (;W[ja];B[jc]) (;W[md];B[lc])) (;W[lc];B[md]) (;W[md];B[lc] (;W[jb];B[jc]) (;W[ja];B[jc]) (;W[jc];B[jb]))) (;W[lc];B[md] (;W[ld];B[kd]) (;W[jb];B[jc] (;W[ja];B[kd]) (;W[ld];B[kd] (;W[ja]C[White is dead; only one eye]) (;W[le];B[lf] (;W[ka]C[White is dead; only one eye]) (;W[ja]C[White is dead; only one eye])))) (;W[ja];B[jc] (;W[jb];B[kd]) (;W[ld];B[kd])) (;W[jc];B[jb] (;W[ja];B[ka] (;W[ld];B[kd]) (;W[ma];B[kd])) (;W[ld];B[kd]) (;W[kd];B[ld] (;W[ka];B[kd];W[ja];B[jc]) (;W[ja];B[ka];W[ma];B[oa]) (;W[ma];B[oa])) (;W[ka];B[kd])) (;W[ka];B[jc];W[ld];B[kd])) (;W[jc];B[jb] (;W[ka];B[lc]) (;W[ja];B[ka] (;W[ld];B[kd]) (;W[lc];B[md];W[ma];B[kd]) (;W[kd];B[ld]) (;W[md];B[lc]C[Black can even afford to tenuki])) (;W[lc];B[md] (;W[ja];B[ka] (;W[ld];B[kd]) (;W[ma];B[kd])) (;W[ka];B[kd]) (;W[ld];B[kd])) (;W[ld];B[kd] (;W[lc];B[md]) (;W[ja];B[jc]) (;W[md];B[lc]))) (;W[jb];B[jc] (;W[lc];B[md];W[ja];B[kd]) (;W[ja];B[lc])) (;W[ja];B[jc] (;W[lc];B[md] (;W[jb];B[kd]) (;W[ld];B[kd] (;W[le];B[lf]) (;W[jb]C[White has only one eye.]))) (;W[jb];B[lc]) (;W[ld];B[kd] (;W[lc];B[md]) (;W[md];B[lc]))) (;W[ka];B[jc] (;W[ld];B[kd]) (;W[lc];B[md];W[ld];B[kd]))) (;W[md];B[lc] (;W[jb];B[jc] (;W[ja];B[la]) (;W[la];B[ja]) (;W[ld];B[kd] (;W[ja];B[la]) (;W[la];B[ja]))) (;W[jc];B[jb];W[ld];B[kd]) (;W[ja];B[jc] (;W[la];B[jb]) (;W[jb];B[la]) (;W[ld];B[kd] (;W[la];B[jb];W[nb];B[sd]LB[ka:B]LB[ma:A]C[White is dead; only one eye (at A -- B is a false eye).]) (;W[jb];B[la]))) (;W[ld];B[kd] (;W[jc];B[jb]) (;W[jb];B[jc] (;W[la];B[ja]) (;W[ja];B[la])) (;W[ja];B[jc] (;W[la];B[jb];W[nb];B[sd]LB[ka:B]LB[ma:A]C[White is dead; only one eye (at A -- B is a false eye).]) (;W[jb];B[la])) (;W[la];B[jb];W[ja];B[jc];W[nb];B[sd]LB[ka:B]LB[ma:A]C[White is dead; only one eye (at A -- B is a false eye).])) (;W[la];B[jc] (;W[ja];B[jb]) (;W[jb];B[ja]) (;W[ld];B[kd]))) (;W[ma];B[lc] (;W[jb];B[jc]) (;W[ja];B[jc]) (;W[ld];B[kd])) (;W[oa];B[kd] (;W[jb];B[jc] (;W[ja];B[la]) (;W[la];B[ja]) (;W[lc];B[md]) (;W[md];B[lc] (;W[ja];B[la]) (;W[la];B[ja]))) (;W[jc];B[jb] (;W[lc];B[md];W[ja];B[jc]) (;W[ja];B[jc])) (;W[ja];B[jc] (;W[la];B[jb]) (;W[jb];B[la]) (;W[lc];B[md] (;W[la];B[jb]) (;W[jb];B[la])) (;W[md];B[lc] (;W[la];B[jb]) (;W[jb];B[la]))) (;W[lc];B[md]) (;W[md];B[lc] (;W[jb];B[jc] (;W[ja];B[la]) (;W[la];B[ja])) (;W[jc];B[jb]) (;W[ja];B[jc];W[la];B[jb]))))