Problem	9543
Created	2006-12-04
Source	DGS: calgary vs adum
Rating

Difficulty	21.2 kyu
Average Solve Time	36 secs
User Attempts	6872 / 13202
Solve Ratio Rating	10 kyu
	rating history

(;AW[rb]AW[qb]AW[qc]AW[pc]AB[pb]AB[qa]AB[oa]AB[na]AB[nb]AB[nc]AB[oc]AW[od]AW[nd]AB[pd]AB[qd]AB[rd]AB[rc]AB[sd]AB[re]AB[rf]AB[sf]AB[rg]AW[rh]AW[sh]AW[sg]AW[qh]AW[qg]AW[qf]AW[qe]AW[oe]AW[pe]AB[mc]AB[lc]AW[ra]LB[ra:A]C[how to handle white A?]AP[goproblems] (;B[sb];W[pa] (;B[ob]C[white cannot approach in the cornerRIGHT]) (;B[sc];W[ob]) (;B[sa];W[ob])) (;B[pa];W[sb]C[seki]) (;B[sa];W[pa] (;B[ob];W[sb]) (;B[sb];W[sc];B[sb];W[ob])) (;B[sc];W[pa] (;B[sb];W[ob]) (;B[ob];W[sb])))