(;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.]))