(;FF[4]GM[1]CA[UTF-8]AP[goproblems:0.1.0]SZ[19]ST[0]AB[sr][sq][rq][qs][pq][oq][or]AW[ns][nr][nq][np][op][pp][qp][rp][sp][sp]C[FORCE](;B[qr];W[os](;B[qq];W[ps];B[rs]C[CHOICE])(;B[rs];W[qq];B[pr]LB[rf:1]C[CHOICE])(;B[ps];W[qq](;B[rs];W[pr]C[CHOICE])(;B[pr];W[rs]C[CHOICE])))(;B[qq](;W[os];B[ps]C[RIGHT])(;W[rs](;B[qr];W[os];B[ps]C[CHOICERIGHT])(;B[os];W[qr](;B[ps];W[rr]C[Black can do better than seki.CHOICE])(;B[pr];W[ps]C[Black can do better than ko.CHOICE]))(;B[rr];W[ps](;B[pr](;W[os];B[ss]C[Black can do better.CHOICE])(;W[qr]C[Black can do better than ko.CHOICE]))(;B[os];W[qr]C[CHOICE])(;B[ss];W[os];B[pr]C[Black can do better.CHOICE]))))(;B[os];W[qr];B[qq];W[rs](;B[ps];W[rr]C[Black can do better than seki.CHOICE])(;B[pr];W[ps]C[Black can do better than ko.CHOICE]))(;B[rs];W[qq];B[qr];W[os];B[pr]C[CHOICE]))
