(;AB[er]AB[fr]AB[gr]AB[jr]AB[lr]AB[kr]AB[mr]AW[dq]AW[eq]AW[fq]AW[gq]AW[hq]AW[iq]AW[jq]AW[kq]AW[lq]AW[mq]AW[nq]AW[oq]AW[pq]AB[hr]AW[dr]AB[nr]C[W to kill :)FORCE]AP[goproblems] (;W[ir];B[is]C[FORCE] (;W[hs]C[Well done! the 5 stones will produce one eye but the 4 stones won't produce any!RIGHT]TR[gs]TR[es]) (;W[js];B[hs] (;W[es]C[Well done! Can't play at F1! And the 5 stones can only produce one eye!RIGHT]LB[fs:A]) (;W[ks];B[es]C[:(]) (;W[fs];B[es]C[:(]) (;W[ds];B[es]C[:(]) (;W[gs];B[es]C[:(])) (;W[es]C[Well done! the 5 stones will produce one eye but the 4 stones won't produce any!RIGHT]) (;W[gs];B[hs]C[:(]) (;W[fs];B[es]C[:(]) (;W[or];B[hs]C[:(]) (;W[ds];B[es]C[:(]) (;W[ks];B[es]C[:(]) (;W[ls];B[es]C[:(]) (;W[ms];B[es]C[:(]) (;W[ns];B[es]C[:(]) (;W[os];B[es]C[:(])) (;W[es];B[ir]LB[fr:1]LB[gr:2]LB[hr:3]LB[jr:5]LB[kr:6]LB[lr:7]LB[mr:8]LB[nr:9]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[is];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[ds];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[fs];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[gs];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[hs];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[js];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[ks];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[ls]C[];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[ms]C[];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[ns];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[or];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]) (;W[os];B[ir]C[Longest killable group on the 2nd line is 7 stones... ;)]))