(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[4]KM[0.00] PW[Weiß]PB[Schwarz]AW[ca][da][bb][ac]AB[db][cc][ad][bd]C[Black to move - what's the best he can do?] (;B[cb]CR[cb] (;W[cd]CR[cd] ;B[dd]CR[dd] ;W[bc]CR[bc] ;B[ba]CR[ba] ;W[cd]CR[cd] ;B[bd]CR[bd]C[Black wins! RIGHT CHOICE]) (;W[bc]CR[bc] ;B[cd]CR[cd] (;W[aa]CR[aa] ;B[ba]CR[ba] ;W[ca]CR[ca] ;B[da]CR[da] ;W[dc]CR[dc] ;B[ba]CR[ba]C[Black wins! RIGHT CHOICE]) (;W[ba]CR[ba] (;B[aa]CR[aa]C[Black wins! ]) (;B[ab]CR[ab]C[Black wins! ]))) (;W[ba]CR[ba] ;B[bc]CR[bc]C[Black wins!])) (;B[bc]CR[bc] (;W[dc]CR[dc] ;B[dd]CR[dd] ;W[cb]CR[cb] ;B[ab]CR[ab] ;W[dc]CR[dc] ;B[ba]CR[ba] ;W[aa]CR[aa] ;B[db]CR[db] ;W[ac]CR[ac]C[White wins!]) (;W[cb]CR[cb]C[This is wrong!] ;B[dc]CR[dc] ;W[ab]CR[ab] ;B[ba]CR[ba]C[Black wins!]) (;W[ab]CR[ab]C[This is wrong!] ;B[cb]CR[cb]C[Black wins!])) (;B[ab]CR[ab] ;W[bc]CR[bc] ;B[cd]CR[cd] ;W[dc]CR[dc]C[White wins!]) (;B[ba]CR[ba] ;W[cb]CR[cb] (;B[bc]CR[bc] ;W[dc]CR[dc] ;B[ab]CR[ab] ;W[aa]CR[aa]C[White wins!]) (;B[dc]CR[dc] ;W[cd]CR[cd]C[White wins!])))