(;TR[og]LB[nh:a]LB[pf:b]AB[hc][kc][ke][kg][kh][lc][le][nd][nf][ng][od][oe][pd][ph][qd][qg]AW[jc][jd][lg][lh][mc][md][me][mf][ne][oc][of][og][qf]C[FORCE]AP[goproblems autoextractor]PW[usrlib]PB[nobunobu]PC[The KGS Go Server at http://www.gokgs.com/]DT[2010-01-30]PL[B]
(;B[nh]TR[of]TR[og]LB[pf:A]C[Playing here is worth about 16 points over playing away in an empty corner. The stones marked with a triangle are weaker. White would have played at A if you played away. RIGHT])
(;B[pf];W[nh]TR[ng]TR[nf]SQ[of]SQ[og]C[This loses about 13 points. The stones marked with a triangle are dead. The stones marked with a square are alive. ]))
