(;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 18 which is the problem position. These do not represent a game sequence!]
;B[qr]
;W[rr]
;B[qq]
;W[pr]
;B[rq]
;W[qs]
;B[qp]
;W[pq]
;B[pp]
;W[op]
;B[oq]
;W[np]
;B[nq]
;W[mp]
;B[nr]
;W[mq]
;B[]
;W[mr]C[This is the problem position. Black to play.]
)
