(;SZ[19]AB[hj]AB[hk]AB[il]AB[jl]AW[ik]AW[lh]AW[hl]AW[hm]TR[ik]C[Black to capture the marked stone]AW[ef]AW[no]AW[eo]FF[4]GM[1]AP[Jago:Version 4.15] (;B[jj];W[jk] (;B[kk];W[ij] (;B[ii]C[The marked stones show a strong shape black should strive for. In a real game white would attempt to move at K-10 (known as the eye-stealing tesuji) vice J-9. Of course this means black should beat him to the punch by playing there first. On further study, it is not necessary to capture the white stone if both black groups are connected, as this is a small 2 point move (thanks Bass)RIGHT]TR[hj]TR[hk]TR[il]TR[jl]TR[jj]) (;B[ji];W[ii] (;B[hi];W[ih]) (;B[ih];W[hi]C[The ladder does not work.])) (;B[hi];W[ii];B[ih];W[ji] (;B[jh];W[ki]) (;B[kj];W[kh]) (;B[ki];W[jh] (;B[jg];W[kh]) (;B[kh];W[jg])))) (;B[ij];W[kk]) (;B[ii];W[kk]) (;B[kj];W[kk] (;B[lk];W[kl]) (;B[kl];W[lk])) (;B[lk];W[kk] (;B[kl];W[kj]) (;B[kj];W[kl])) (;B[kl];W[kk] (;B[lk];W[kj]) (;B[kj];W[lk]))) (;B[jk];W[ij] (;B[ii];W[jj] (;B[kj];W[ji] (;B[jh];W[ki] (;B[li];W[kh]TR[lh]C[M-12 was a ladder-breaker.]) (;B[kh];W[li])) (;B[ki];W[jh]) (;B[kh];W[ki];B[li];W[jh];B[kg];W[lj] (;B[mi];W[kk]) (;B[kk];W[mi]))) (;B[ki];W[kj];B[lj];W[kk] (;B[lk];W[kl];B[km];W[ll];B[ml];W[lm];B[ln];W[mm];B[nm];W[mn]) (;B[kl];W[lk])) (;B[ji];W[kj])) (;B[jj];W[ii]) (;B[ji];W[ii];B[ih];W[hi] (;B[hh];W[gi]) (;B[gi];W[hh];B[hg];W[jh] (;B[gh];W[ig];B[jj];W[ih]) (;B[ig];W[jj] (;B[ki];W[kj]) (;B[kj];W[ki]) (;B[gh];W[ki])))) (;B[hi];W[ji] (;B[jj];W[ii]) (;B[ii];W[jj]) (;B[ki];W[jh]) (;B[jh];W[ki]))) (;B[ij];W[jk] (;B[kk];W[jj] (;B[ji];W[kj] (;B[lj];W[ki] (;B[kh];W[li]TR[lh]C[M-12 was the ladder breaker (]) (;B[li];W[kh])) (;B[ki];W[lj]) (;B[li];W[lj])) (;B[ki];W[ji];B[jh];W[ii];B[ih];W[hi];B[gi];W[hh];B[hg];W[gh];B[fh];W[gg];B[gf];W[fg]) (;B[kj];W[ji])) (;B[jj];W[kk]) (;B[kj];W[kk] (;B[kl];W[lk]) (;B[lk];W[kl] (;B[km];W[jm]) (;B[ll];W[jm])))) (;B[ji];W[jk];B[kk];W[kl] (;B[jj];W[jm];B[ij];W[im]C[RIGHT]) (;B[km];W[kj] (;B[ll];W[jj]) (;B[lk];W[jj])) (;B[ij]C[RIGHT]) (;B[kj];W[jm])) (;B[kj];W[ij];B[ii];W[hi] (;B[jj];W[gj];B[jk];W[gk]C[RIGHT]) (;B[gi];W[ji] (;B[hh];W[jj]) (;B[ih];W[jj]) (;B[jj];W[ih])) (;B[jk]C[RIGHT]) (;B[ji];W[gj];B[gk];W[fk];B[gl]C[a ladder])) (;B[ki];W[jj]LB[kj:A]C[Please play at AFORCE];B[kj];W[ji] (;B[jh];W[ii] (;B[jk];W[ih];B[ij]C[RIGHT]) (;B[kk];W[ih]) (;B[ih];W[hi];B[jk];W[ij];B[gi];W[hh];B[hg];W[gh];B[fh];W[gg];B[gf];W[fg];B[eg];W[ff]) (;B[ij];W[jk];B[kk];W[hh])) (;B[jk];W[ij];B[jh];W[ii] (;B[hh]C[RIGHT]) (;B[ih];W[hi];B[gi];W[hh];B[hg];W[gh];B[fh];W[gg];B[gf];W[fg];B[eg];W[ff]) (;B[hi];W[ih];B[ig];W[hh];B[gh];W[hg];B[hf];W[gg];B[fg];W[gf];B[ge];W[ff]) (;B[gh];W[ih];B[ig];W[jg];B[kh];W[hg];B[if];W[hh]) (;B[hg];W[hi];B[gi];W[gj];B[gk];W[gh];B[fi];W[hh])) (;B[ij];W[jk];B[kk];W[jh])) (;B[kk];W[ij];B[ii];W[jj] (;B[ki];W[ji];B[jh];W[ih];B[hi];W[kh] (;B[jg];W[kj] (;B[li];W[lj]) (;B[lj];W[li])) (;B[kj];W[jg])) (;B[ji];W[kj])) (;B[ii];W[jk];B[kk];W[jj] (;B[ki];W[kj];B[lj];W[lk];B[kl];W[li];B[mj];W[ji] (;B[kh];W[jh]) (;B[jh];W[kh])) (;B[kj];W[ji])))