(;TR[ri]LB[nh:a]LB[ol:b]LB[pl:c]LB[qn:d]LB[rk:e]AB[nk][og][oi][oj][pe][pf][ph][pi][pq][qd][qj][qk][rl][rm]AW[oh][ok][pg][pj][pk][po][qf][qg][qh][qi][ql][qm][ri]C[FORCE]AP[goproblems autoextractor]PW[Adviser]PB[misoka]PC[The KGS Go Server at http://www.gokgs.com/]DT[2010-02-17]PL[B]GPKEY[local choice]DIFF[4k]
(;B[ol]LB[rk:A]LB[pl:B]C[Playing here is worth about 16 points over playing away in an empty corner. White would have played at A if you played away. White would likely play at B next. ];W[pl]
(;B[qn]C[RIGHT])
(;B[rk];W[qn]C[Your mistake at S9 lost approximately 28 points]))
(;B[nh];W[rk]C[This loses about 16 points. ])
(;B[pl];W[ol]TR[qk]TR[qj]C[This loses about 12 points. The stones marked with a triangle are stronger but this is not sufficient. ])
(;B[qn];W[rk]C[This loses about 17 points. ])
(;B[rk];W[qn]TR[rm]TR[rl]C[This loses about 22 points. The stones marked with a triangle are weaker. ]))
