(;GM[1]FF[4]CA[UTF-8]
SZ[19]RU[Japanese]KM[0]TM[1800,0,30,5]PW[]PB[]AB[eq][dp]AW[fq][fp][hp][ir][jr]AB[jq][jp][kr][np][pp]AW[qn]AE[dn]AB[cn]AE[qq][rp]TR[fq][fp][hp][ir][jr]PL[B]
(;B[iq]CR[iq]
;W[hr]CR[hr]
(;B[fr]CR[fr]
;W[gr]CR[gr]
(;B[er]CR[er]
;W[lr]CR[lr]
(;B[kq]CR[kq]
;W[ks]CR[ks]
(;B[mq]CR[mq]C[RIGHT
best shape for black, worst for white])
(;B[lq]CR[lq]
;W[mr]CR[mr]))
(;B[lq]CR[lq]
;W[ks]CR[ks]
;B[kq]CR[kq]
;W[mr]CR[mr])
(;B[ks]CR[ks]
;W[kq]CR[kq]
;B[lq]CR[lq]
;W[kp]CR[kp]
;B[lp]CR[lp]
;W[ko]CR[ko]
;B[mr]CR[mr]
;W[jo]CR[jo]))
(;B[hq]CR[hq]
;W[er]CR[er]))
(;B[hq]CR[hq]
;W[gr]CR[gr]LB[fr:A]C[this stops the hane at A])
(;B[lq]CR[lq]
;W[er]CR[er]))
(;B[hq]CR[hq]
;W[iq]CR[iq]
(;B[ip]CR[ip]
;W[hr]CR[hr]C[white is strong])
(;B[hr]CR[hr]
;W[gr]CR[gr]))
(;B[fr]CR[fr]
;W[gr]CR[gr]
;B[er]CR[er]LB[iq:A][hq:B]C[now white can block A at B])
(;B[gr]CR[gr]
;W[fr]CR[fr]
;B[iq]CR[iq]
;W[hr]CR[hr])
(;B[hr]CR[hr]
;W[gr]CR[gr])
(;B[js]CR[js]
;W[iq]CR[iq])
(;B[ho]CR[ho]
;W[er]CR[er]))