(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PB[Black to play]
;B[ac]
;W[ab]
;B[ad]
;W[bc]
;B[bd]
;W[cc]
;B[cd]
;W[dc]
;B[dd]
;W[ba]
;B[ed]
;W[]
;B[ec]
;W[]
;B[eb]C[Problem 1 - Black to play]
;W[]
;B[pa]
;W[qa]
;B[pb]
;W[qb]
;B[pc]
;W[rb]
;B[qd]
;W[sb]
;B[qe]
;W[rd]
;B[qf]
;W[]
;B[qg]
;W[]C[Problem 2 - Black to Play]
;B[bq]
;W[br]
;B[bp]
;W[cq]
;B[cp]
;W[dr]
;B[dp]
;W[er]
;B[ep]
;W[ar]
;B[fq]
;W[bs]
;B[fr]
;W[]
;B[fs]C[Problem 3 - Black to Play]
;W[]
;B[qr]
;W[rr]
;B[pr]
;W[sr]
;B[pq]
;W[qq]
;B[pp]
;W[qp]
;B[po]
;W[ro]
;B[qn]
;W[rs]
;B[rn]
;W[]
;B[sn]C[Problem 4 - Black to Play])
