(;AW[bq]AW[cq]AW[dq]AW[fq]AW[fr]AW[gp]AW[ho]AW[io]AW[jo]AW[in]AW[kp]AW[jq]AW[jr]AW[lq]AW[lr]AW[nr]AW[ns]AW[os]AW[mq]AB[bp]AB[cp]AB[dp]AB[fp]AB[fo]AB[go]AB[gn]AB[hn]AB[im]AB[jm]AB[jn]AB[kn]AB[lo]AB[ko]AB[lp]AB[mp]AB[np]AB[nq]AB[oq]AB[pr]AB[ps]AB[or]AB[kr]AB[hq]C[Exploit the bad aji in W's territory.]AP[goproblems] (;B[ls]C[] (;W[mr] (;B[gq] (;W[hp] (;B[jp];W[ip];B[iq];W[jp] (;B[ir];W[kq];B[ks];W[js];B[is];W[ms];B[ks];W[gr] (;B[kr];W[ls] (;B[ks]C[B wins the semeai. CHOICERIGHT]) (;B[kr]C[RIGHT]))) (;B[ks];W[ir];B[kq]C[Not as good as the solution]) (;B[js];W[ir];B[hr];W[hs]))))) (;W[kq]C[W can't not resist by connecting at the marked spot. See the variation in the solution tree.]TR[mr];B[mr];W[ks];B[ms]C[Good job. RIGHT])) (;B[gq];W[hp];B[jp];W[ip];B[iq];W[jp];B[ls];W[kq];B[mr];W[ks];B[ms]C[Not as good as the solution because of the waste of ko threats.]) (;B[hp];W[gq];B[jp];W[ip];B[iq];W[jp];B[ls];W[mr]C[Nothing]))