(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[4]KM[0.00]
PW[Weiß]PB[Schwarz]AW[bb][bc]AB[db][cc][dc][bd][cd]C[White to play - what's the best he can do?]PL[W]
(;W[ca]CR[ca]
(;B[ac]CR[ac]
;W[ab]CR[ab]
;B[cb]CR[cb]
(;W[ba]CR[ba]
;B[ad]CR[ad]C[Seki & jigo! RIGHT])
(;W[ad]CR[ad]
;B[ba]CR[ba]C[White is dead!]))
(;B[cb]CR[cb]
;W[ac]CR[ac]
;B[da]CR[da]
;W[ba]CR[ba]
;B[ab]CR[ab]
;W[aa]CR[aa]C[In this variation white wns by one point, but B C3 was a mistake.]))
(;W[cb]CR[cb]
;B[ca]CR[ca]
;W[ba]CR[ba]
;B[ac]CR[ac]C[SInce White can't play A3, he is dead.])
(;W[ba]CR[ba]
;B[ca]CR[ca]
;W[cb]CR[cb]
;B[ac]CR[ac]C[White can't play A3, so he is dead.])
(;W[ac]CR[ac]
;B[ca]CR[ca]
;W[cb]CR[cb]
;B[ba]CR[ba]C[White is dead.]))