(;AB[pq]AB[po]AB[oo]AB[qn]AB[qm]AB[rn]AB[sm]AB[rl]AB[rk]AB[pl]AB[pk]AB[ok]AB[nj]AB[pi]AB[qi]AW[mo]AW[mq]AW[qo]AW[ro]AW[qq]AW[rq]AW[pm]AW[pn]AW[ol]AW[nk]AW[nm]AW[qj]AW[qk]AW[ql]AW[qh]MA[mo]C[W has played the marked stone, big mistake (assume the ladders don't work). Thanks Yoon for his comment, the variation's been added to the navigation solution]AP[goproblems] (;B[om] (;W[on];B[nn];W[om];B[mm];W[nl] (;B[mk];W[ml];B[ll]C[niceRIGHT]) (;B[ml];W[mk];B[lk];W[mj];B[mi]C[I told you the ladders didn't work])) (;W[nl];B[nn];W[mn]C[RIGHT])) (;B[on];W[om];B[nn];W[mm]C[no, that doesn't work]) (;B[nn];W[om];B[mm];W[ml] (;B[on];W[nl];B[ll];W[mk] (;B[mj];W[lk];B[kk];W[lj];B[li]C[Sorry, I told you the ladders didn't work])) (;B[mk];W[ll];B[nl]C[Ko, you can do better])))