(;AB[br]AB[cr]AB[dr]AB[hr]AB[ir]AB[gs]AW[ar]AW[aq]AW[bq]AW[cq]AW[dq]AW[eq]AW[gq]AW[fq]AW[hq]AW[bp]AW[ap]AW[an]AW[bn]AW[al]AW[bl]AW[dj]AW[dk]AW[ai]AW[bi]AW[ci]AW[di]AB[bj]AB[ah]AB[bh]AB[ch]AB[dh]AB[eh]AB[ei]AB[ej]AB[ek]AB[el]AB[dm]AB[cn]AB[cl]AW[ck]AB[aj]AW[bk]AB[dl]AB[do]AB[dp]AB[ep]AB[fp]AB[gp]AB[hp]AB[ip]AB[iq]AB[bm]AB[bo]AB[dn]AW[cj]TR[gs]C[Black tries to kill White with the triangled move. What should White do?]AP[goproblems] (;W[er];B[es] (;W[ds];B[cs] (;W[bs];B[as] (;W[fs];B[fr] (;W[bs];B[co] (;W[ao];B[as] (;W[gr];B[fs] (;W[bs];B[cm] (;W[am];B[as];W[hs];B[is];W[bs];B[hs];W[ds]C[You used the internal ko threats to great effect :)RIGHT]) (;W[ds];B[am]TR[ai]TR[bi]TR[ci]TR[di]TR[dj]TR[dk]TR[ck]TR[bk]TR[bl]TR[al]C[You could have saved them...]TR[cj]) (;W[hs];B[am]TR[al]TR[bl]TR[bk]TR[ck]TR[dk]TR[dj]TR[di]TR[ci]TR[bi]TR[ai]TR[es]TR[fs]TR[gs]TR[fr]C[Your loss is bigger than your gain...])) (;W[am];B[hs]) (;W[hs];B[is] (;W[bs];B[cm] (;W[ds];B[am]) (;W[am];B[as]C[You ran out of ko threats, so Black can connect]MA[ds]MA[hs])) (;W[am];B[hs]))) (;W[am];B[fs]) (;W[hs];B[gr] (;W[bs];B[cm] (;W[ds];B[am]) (;W[am];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[fs])) (;W[am];B[fs]))) (;W[am];B[ao]) (;W[ds];B[ao]) (;W[gr];B[ao]) (;W[as];B[fs] (;W[ds];B[ao]) (;W[gr];B[hs];W[ds];B[ao]) (;W[ao];B[ds]) (;W[am];B[ds]))) (;W[gr];B[fs] (;W[bs];B[co] (;W[ao];B[as] (;W[hs];B[is] (;W[bs];B[cm] (;W[ds];B[am]) (;W[am];B[as]C[You ran out of ko threats, so Black can connect]MA[ds]MA[hs])) (;W[am];B[hs])) (;W[am];B[hs])) (;W[hs];B[ao]) (;W[am];B[ao]) (;W[as];B[hs];W[ds];B[ao])) (;W[hs];B[is] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[hs]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[ao];B[hs]) (;W[am];B[hs])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[co];B[cp] (;W[bs];B[co] (;W[ao];B[as] (;W[hs];B[am]) (;W[am];B[hs])) (;W[ds];B[ao]) (;W[hs];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[hs];B[ao]) (;W[ao];B[am]) (;W[am];B[ao])) (;W[cp];B[co] (;W[ao];B[am]) (;W[am];B[ao]) (;W[bs];B[ao]) (;W[hs];B[ao]))) (;W[ao];B[fs]) (;W[am];B[fs]) (;W[co];B[cp] (;W[bs];B[co] (;W[ds];B[ao]) (;W[gr];B[ao]) (;W[hs];B[ao]) (;W[ao];B[as] (;W[gr];B[am]) (;W[am];B[fs]) (;W[hs];B[gr] (;W[bs];B[cm] (;W[am];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[fs]) (;W[as];B[am])) (;W[am];B[fs]))) (;W[am];B[ao]) (;W[as];B[ao])) (;W[gr];B[ao]) (;W[hs];B[gr] (;W[bs];B[co] (;W[ds];B[ao]) (;W[ao];B[as];W[am];B[fs]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[ao];B[am]) (;W[am];B[ao])) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[cp];B[co] (;W[bs];B[ao]) (;W[ao];B[fs]) (;W[gr];B[fs] (;W[ao];B[am]) (;W[am];B[ao]) (;W[bs];B[ao]) (;W[hs];B[ao])) (;W[am];B[ao]) (;W[hs];B[ao])) (;W[hs];B[gr] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[fs]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[ao];B[fs]) (;W[am];B[fs]))) (;W[am];B[fs]) (;W[ao];B[fs]) (;W[gr];B[fs]) (;W[fr];B[fs]) (;W[hs];B[fs]) (;W[cp];B[co] (;W[ao];B[fs]) (;W[fs];B[ao]) (;W[fr];B[fs]) (;W[gr];B[fs]) (;W[hs];B[fs]) (;W[am];B[fs])) (;W[co];B[cp] (;W[fr];B[fs]) (;W[gr];B[fs]) (;W[hs];B[fs]) (;W[fs];B[fr] (;W[bs];B[co] (;W[ds];B[ao]) (;W[gr];B[ao]) (;W[hs];B[ao]) (;W[ao];B[as] (;W[gr];B[am]) (;W[am];B[fs]) (;W[hs];B[gr] (;W[bs];B[cm] (;W[am];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[fs]) (;W[as];B[am])) (;W[am];B[fs]))) (;W[am];B[ao]) (;W[as];B[ao])) (;W[gr];B[ao]) (;W[hs];B[gr] (;W[bs];B[co] (;W[ds];B[ao]) (;W[ao];B[as];W[am]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[ao];B[am]) (;W[am];B[ao])) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[bs];B[co] (;W[ao];B[as] (;W[fr];B[fs]) (;W[gr];B[fs]) (;W[hs];B[fs]) (;W[fs];B[fr] (;W[bs];B[cm] (;W[am];B[as] (;W[gr];B[ak]) (;W[hs];B[gr] (;W[bs];B[fs] (;W[ds]C[True, true, true. Another solution after all those years, thanks to mtaits.RIGHT]) (;W[as];B[ak]) (;W[ak];B[ds])) (;W[ak];B[fs])) (;W[ak];B[fs])) (;W[gr];B[am]) (;W[as];B[am]) (;W[hs];B[am]) (;W[ak];B[as])) (;W[gr];B[am]) (;W[am];B[fs]) (;W[hs];B[gr] (;W[bs];B[cm] (;W[am];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[fs]) (;W[as];B[am])) (;W[am];B[fs])) (;W[ak];B[fs])) (;W[am];B[fs]) (;W[ak];B[fs])) (;W[as];B[ao]) (;W[ds];B[ao]) (;W[fs];B[ao]) (;W[fr];B[ao]) (;W[gr];B[ao]) (;W[hs];B[ao]) (;W[am];B[ao]) (;W[ak];B[as])) (;W[ao];B[fs]) (;W[am];B[fs]))) (;W[am];B[fs]) (;W[ao];B[fs]) (;W[as];B[fs]) (;W[cp];B[co] (;W[bs];B[ao]) (;W[ao];B[fs]) (;W[am];B[ao]) (;W[fs];B[ao]) (;W[fr];B[fs]) (;W[gr];B[fs]) (;W[as];B[fs]) (;W[hs];B[fs])) (;W[co];B[cp] (;W[am];B[fs]) (;W[ao];B[fs]) (;W[as];B[fs]) (;W[fr];B[fs]) (;W[gr];B[fs]) (;W[hs];B[fs]) (;W[fs];B[fr] (;W[bs];B[co] (;W[ds];B[ao]) (;W[gr];B[ao]) (;W[hs];B[ao]) (;W[ao];B[as] (;W[gr];B[am]) (;W[am];B[fs]) (;W[hs];B[gr] (;W[bs];B[cm] (;W[am];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[fs]) (;W[as];B[am])) (;W[am];B[fs]))) (;W[am];B[ao]) (;W[as];B[ao])) (;W[gr];B[fs] (;W[bs];B[co] (;W[ao];B[as] (;W[hs];B[am]) (;W[am];B[hs])) (;W[ds];B[ao]) (;W[hs];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[hs];B[is] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ds];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[as];B[hs]) (;W[ao];B[hs]) (;W[am];B[hs])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[as];B[hs])) (;W[as];B[fs]) (;W[hs];B[gr] (;W[bs];B[co] (;W[ds];B[ao]) (;W[ao];B[as];W[am]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[as];B[fs]) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[bs];B[as] (;W[fs];B[fr]) (;W[fr];B[fs]) (;W[gr];B[fs]) (;W[hs];B[fs]) (;W[ao];B[fs]) (;W[am];B[fs]))) (;W[gr];B[fs]) (;W[fr];B[fs]) (;W[hs];B[fs]) (;W[fs];B[fr] (;W[gr];B[fs] (;W[hs];B[is] (;W[bs];B[as] (;W[co];B[cp] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ds];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[ao];B[am]) (;W[am];B[ao])) (;W[cp];B[co] (;W[bs];B[ao]) (;W[ao];B[am]) (;W[am];B[ao])) (;W[ao];B[hs]) (;W[am];B[hs])) (;W[as];B[hs]) (;W[cp];B[co] (;W[bs];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ao];B[hs]) (;W[as];B[hs]) (;W[am];B[ao])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[co];B[cp] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ds];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[as];B[hs]) (;W[ao];B[hs]) (;W[am];B[hs]))) (;W[bs];B[as] (;W[hs];B[is] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[hs]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[ao];B[hs]) (;W[am];B[hs])) (;W[cp];B[co] (;W[ao];B[am]) (;W[am];B[ao]) (;W[bs];B[ao]) (;W[hs];B[ao])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[co];B[cp] (;W[bs];B[co] (;W[ao];B[as] (;W[hs];B[am]) (;W[am];B[hs])) (;W[ds];B[ao]) (;W[hs];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[hs];B[ao]) (;W[ao];B[am]) (;W[am];B[ao]))) (;W[as];B[hs]) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[cp];B[co] (;W[ao];B[hs]) (;W[bs];B[ao]) (;W[as];B[ao]) (;W[hs];B[is] (;W[bs];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ao];B[hs]) (;W[as];B[hs]) (;W[am];B[ao])) (;W[am];B[ao])) (;W[co];B[cp] (;W[bs];B[co]) (;W[hs];B[is] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ds];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[as];B[hs]) (;W[ao];B[hs]) (;W[am];B[hs])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[as];B[hs]))) (;W[bs];B[as] (;W[gr];B[fs] (;W[bs];B[co] (;W[ao];B[as] (;W[hs]) (;W[am])) (;W[hs];B[ao]) (;W[am];B[ao]) (;W[as])) (;W[hs];B[is] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[hs]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[ao];B[hs]) (;W[am];B[hs])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[co];B[cp] (;W[bs];B[co] (;W[ao];B[as] (;W[hs];B[am]) (;W[am];B[hs])) (;W[ds];B[ao]) (;W[hs];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[hs];B[ao]) (;W[ao];B[am]) (;W[am];B[ao])) (;W[cp];B[co] (;W[ao];B[am]) (;W[am];B[ao]) (;W[bs];B[ao]) (;W[hs];B[ao]))) (;W[ao];B[fs]) (;W[am];B[fs]) (;W[co];B[cp] (;W[bs];B[co] (;W[ds];B[ao]) (;W[gr];B[ao]) (;W[hs];B[ao]) (;W[ao];B[as] (;W[gr];B[am]) (;W[am];B[fs]) (;W[hs];B[gr] (;W[bs];B[cm] (;W[am];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[fs]) (;W[as];B[am])) (;W[am];B[fs]))) (;W[am];B[ao]) (;W[as];B[ao])) (;W[gr];B[ao]) (;W[hs];B[gr] (;W[bs];B[co] (;W[ds];B[ao]) (;W[ao];B[as];W[am]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[ao];B[am]) (;W[am];B[ao])) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[cp];B[co] (;W[bs];B[ao]) (;W[ao];B[fs]) (;W[gr];B[fs]) (;W[am];B[ao]) (;W[hs];B[ao])) (;W[hs];B[gr] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can connect.]MA[ds]MA[fs]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[ao];B[fs]) (;W[am];B[fs]))) (;W[as];B[fs]) (;W[ao];B[fs]) (;W[am];B[fs]) (;W[cp];B[co] (;W[bs];B[ao]) (;W[ao];B[fs]) (;W[gr];B[ao]) (;W[hs];B[ao]) (;W[as];B[fs]) (;W[am];B[ao])) (;W[co];B[cp] (;W[bs];B[co]) (;W[gr];B[fs] (;W[bs];B[co]) (;W[hs];B[is] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ds];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[as];B[hs]) (;W[ao];B[hs]) (;W[am];B[hs])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[as];B[hs])) (;W[as];B[fs]) (;W[hs];B[gr] (;W[bs];B[co]) (;W[as];B[fs]) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[hs];B[gr] (;W[bs];B[as] (;W[ao];B[fs]) (;W[am];B[fs]) (;W[co]) (;W[cp])) (;W[cp];B[co] (;W[bs];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ao];B[fs]) (;W[am];B[ao]) (;W[as];B[ao])) (;W[as];B[fs]) (;W[ao];B[fs]) (;W[am];B[fs]) (;W[co];B[cp] (;W[bs];B[co]) (;W[as];B[fs]) (;W[ao];B[fs]) (;W[am];B[fs]))))) (;W[fs];B[fr] (;W[ds];B[cs] (;W[gr];B[fs] (;W[hs];B[is] (;W[bs];B[as] (;W[co];B[cp] (;W[bs];B[co]) (;W[ao];B[am]) (;W[am];B[ao])) (;W[cp];B[co] (;W[bs];B[ao]) (;W[ao];B[am]) (;W[am];B[ao])) (;W[ao]) (;W[am])) (;W[as];B[hs]) (;W[cp];B[co] (;W[bs];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ao];B[hs]) (;W[as];B[hs]) (;W[am];B[ao])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[co];B[cp])) (;W[bs];B[as] (;W[hs]) (;W[cp]) (;W[ao]) (;W[am]) (;W[co])) (;W[as];B[hs]) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[cp];B[co] (;W[ao];B[hs]) (;W[bs];B[ao]) (;W[as];B[ao]) (;W[hs];B[is]) (;W[am];B[ao])) (;W[co];B[cp])) (;W[bs];B[as] (;W[gr]) (;W[ao]) (;W[am]) (;W[co]) (;W[cp]) (;W[hs])) (;W[as];B[fs]) (;W[ao];B[fs]) (;W[am];B[fs]) (;W[cp];B[co] (;W[bs];B[ao]) (;W[ao];B[fs]) (;W[gr];B[ao]) (;W[hs];B[ao]) (;W[as];B[fs]) (;W[am];B[ao])) (;W[co];B[cp]) (;W[hs];B[gr] (;W[bs];B[as] (;W[ao]) (;W[am]) (;W[co]) (;W[cp])) (;W[cp];B[co] (;W[bs];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ao];B[fs]) (;W[am];B[ao]) (;W[as];B[ao])) (;W[as];B[fs]) (;W[ao];B[fs]) (;W[am];B[fs]) (;W[co];B[cp]))) (;W[gr];B[fs];W[ds];B[cs] (;W[hs];B[is] (;W[bs];B[as] (;W[co];B[cp] (;W[bs];B[co]) (;W[ao];B[am]) (;W[am];B[ao])) (;W[cp];B[co] (;W[bs];B[ao]) (;W[ao];B[am]) (;W[am];B[ao])) (;W[ao]) (;W[am])) (;W[as];B[hs]) (;W[cp];B[co] (;W[bs];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ao];B[hs]) (;W[as];B[hs]) (;W[am];B[ao])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[co];B[cp])) (;W[bs];B[as] (;W[hs]) (;W[cp]) (;W[ao]) (;W[am]) (;W[co])) (;W[as];B[hs]) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[cp];B[co] (;W[ao];B[hs]) (;W[bs];B[ao]) (;W[as];B[ao]) (;W[hs];B[is]) (;W[am];B[ao])) (;W[co];B[cp]))) (;W[fr];B[fs]) (;W[gr];B[fs]) (;W[hs];B[fs]) (;W[bs];B[ds]) (;W[cs];B[ds]) (;W[cp];B[co] (;W[ao];B[fs]) (;W[ds];B[ao]) (;W[fs];B[ao])) (;W[co];B[cp];W[ds];B[cs] (;W[am];B[fs]) (;W[ao];B[fs]) (;W[as];B[fs]) (;W[fr];B[fs]) (;W[gr];B[fs]) (;W[hs];B[fs]) (;W[fs];B[fr] (;W[bs];B[co]) (;W[gr];B[fs] (;W[bs];B[co]) (;W[hs];B[is] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ds];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[as];B[hs]) (;W[ao];B[hs]) (;W[am];B[hs])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[as];B[hs])) (;W[as];B[fs]) (;W[hs];B[gr] (;W[bs];B[co]) (;W[as];B[fs]) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[bs];B[as] (;W[fs]) (;W[fr]) (;W[gr]) (;W[hs]) (;W[ao]) (;W[am])))) (;W[gr];B[fs] (;W[er];B[es]) (;W[es];B[er]) (;W[fr];B[es]) (;W[hs];B[es]) (;W[ds];B[er])) (;W[fs];B[fr] (;W[er];B[es] (;W[ds];B[cs]) (;W[gr];B[fs];W[ds];B[cs])) (;W[gr];B[es] (;W[er];B[fs];W[ds];B[cs]) (;W[hs];B[fs]) (;W[bs];B[er]))) (;W[fr];B[fs]) (;W[es];B[er];W[gr];B[fs]) (;W[ds];B[er];W[gr];B[fs]) (;W[co];B[cp] (;W[er];B[es];W[ds];B[cs]) (;W[bs];B[er]) (;W[fr];B[fs]) (;W[gr];B[fs]) (;W[es];B[er]) (;W[fs];B[fr] (;W[gr];B[es]) (;W[er];B[es] (;W[ds];B[cs] (;W[bs];B[co]) (;W[gr];B[fs] (;W[bs];B[co]) (;W[hs];B[is] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ds];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[as];B[hs]) (;W[ao];B[hs]) (;W[am];B[hs])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[as];B[hs])) (;W[as];B[fs]) (;W[hs];B[gr] (;W[bs];B[co]) (;W[as];B[fs]) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[ao];B[fs]) (;W[am];B[fs])) (;W[gr];B[fs] (;W[ds];B[cs] (;W[bs];B[co]) (;W[hs];B[is] (;W[bs];B[co] (;W[ao];B[as]C[You ran out of ko threats, so Black can capture.]) (;W[ds];B[ao]) (;W[as];B[ao]) (;W[am];B[ao])) (;W[as];B[hs]) (;W[ao];B[hs]) (;W[am];B[hs])) (;W[ao];B[hs]) (;W[am];B[hs]) (;W[as];B[hs])) (;W[bs];B[ds]))))) (;W[bs];B[er]))