(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[]PB[Black to play]C[Just play through the moves to move 26 which is the problem
position. These do not represent a game sequence!]
;B[pp]
;W[op]
;B[pq]
;W[oq]
;B[oo]
;W[po]
;B[on]
;W[pn]
;B[pm]
;W[rn]
;B[rm]
;W[sn]
;B[qn]
;W[qo]
;B[qm]
;W[rp]
;B[sm]
;W[pr]
;B[qq]
;W[qr]
;B[rq]
;W[rr]
;B[sq]
;W[or]
;B[sr]
;W[ss]C[This is the problem position. Black to play.]
)
