(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PB[Black to play]C[Just play through the moves to move 30 which is the problem position. 
These do not represent a game sequence!]
;B[pr]
;W[ps]
;B[qr]
;W[qs]
;B[or]
;W[nr]
;B[oq]
;W[ns]
;B[nq]
;W[ms]
;B[mr]
;W[rr]
;B[lr]
;W[qq]
;B[ls]
;W[qp]
;B[mq]
;W[op]
;B[]
;W[np]
;B[]
;W[mp]
;B[]
;W[lq]
;B[]
;W[kq]
;B[]
;W[kr]
;B[]
;W[ks]C[This is the problem position. Black to play.])

