(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[White]PB[Black]AW[ba][da][gb][bc][fc][gc][bd][cd][dd][ed]AB[fa][bb][db][fb][cc][dc][ec]C[What can black do here?]
(;B[ea]CR[ea]
;W[ab]CR[ab]
(;B[cb]CR[cb]C[RIGHT])
(;B[ca]CR[ca]
;W[cb]CR[cb]C[Ko. Black can do better.]))
(;B[ab]CR[ab]
;W[cb]CR[cb]
(;B[eb]CR[eb]
;W[ca]CR[ca]C[Black is dead])
(;B[ea]CR[ea]
;W[eb]CR[eb])
(;B[ca]CR[ca]C[Ko. Black can do better.]))
(;B[cb]CR[cb]
;W[ga]CR[ga]
(;B[ca]CR[ca]
;W[ea]CR[ea]
;B[eb]CR[eb]
;W[ab]CR[ab])
(;B[ab]CR[ab]
;W[eb]CR[eb]
(;B[ca]CR[ca]
;W[ea]CR[ea])
(;B[ea]CR[ea]
;W[eb]CR[eb])))
(;B[ca]CR[ca]
;W[cb]CR[cb]C[Ko. Black can do better.])
(;B[eb]CR[eb]
;W[ca]CR[ca]
(;B[ab]CR[ab]
;W[cb]CR[cb])
(;B[cb]CR[cb]
;W[ab]CR[ab])))