(;AB[hs]AB[hr]AB[hq]AB[ip]AB[io]AB[jn]AB[kn]AB[ln]AB[lp]AB[mo]AB[np]AB[mq]AB[lr]AB[kq]AW[iq]AW[jq]AW[gs]AW[gr]AW[gq]AW[hp]AW[fp]AW[ho]AW[hn]AW[in]AW[im]AW[jm]AW[km]AW[lm]AW[mm]AW[mn]AW[no]AW[oo]AW[op]AW[oq]AW[or]AW[os]AW[mr]AW[ms]AW[om]C[What can white do here?]AP[goproblems]
(;W[is];B[jp];W[ko];B[jr];W[ir];B[kp])
(;W[ir];B[jp];W[ko];B[jr];W[is];B[kp])
(;W[jr];B[jp];W[ko];B[lo]
(;W[kr];B[nq])
(;W[nq];B[kr]))
(;W[js];B[jp])
(;W[jp];B[jr]
(;W[ir];B[kp]
(;W[jo];B[ko])
(;W[js];B[jo]
(;W[is];B[nq])
(;W[kr];B[nq]))
(;W[is];B[jo])
(;W[ko];B[lo]
(;W[is];B[jo])
(;W[jo];B[nq])))
(;W[jo];B[ir])
(;W[ko];B[ir])
(;W[lo];B[ko]
(;W[ir];B[kp])
(;W[kp];B[ir])
(;W[jo];B[ir])))
(;W[ls];B[jp])
(;W[ks];B[jp])
(;W[kr];B[jp])
(;W[nq];B[jr])
(;W[jo];B[jr]
(;W[jp];B[ir])
(;W[kp];B[ir];W[jp];B[ls])
(;W[ko];B[ir];W[jp];B[ls])
(;W[ir];B[kp];W[jp];B[ko]))
(;W[ko];B[jr]
(;W[ir];B[kp];W[jp];B[lo];W[jo];B[nq])
(;W[jp];B[ir])
(;W[kp];B[ir])
(;W[jo];B[ir];W[jp];B[ls]))
(;W[kp];B[jo]
(;W[kr];B[jp];W[lq]MA[kq]C[You can kill without ko.])
(;W[jr];B[jp])
(;W[ir];B[jp])
(;W[is];B[jp])
(;W[jp];B[jr]
(;W[lo];B[ir];W[ko];B[ls]C[close ...])
(;W[ir]C[Good work! L4 was the critical point.RIGHT]MA[kp])
(;W[ko];B[lo]))
(;W[lo];B[jr]
(;W[ko];B[ir];W[jp];B[ls])
(;W[jp];B[ir];W[ko];B[ls])
(;W[ir];B[ko]
(;W[is];B[jp])
(;W[jp];B[is])
(;W[js];B[kr];W[is];B[jp])))))