(;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][cb]AB[aa][ab][ac][cc][ad][bd]C[White to move - what*s the best he can do?]PL[W] (;W[dc]CR[dc] (;B[db]CR[db] ;W[da]CR[da] ;B[ba]CR[ba] (;W[bc]CR[bc] ;B[cd]CR[cd]C[Seki, White wins by one point (the prisoner) RIGHT]) (;W[ca]CR[ca]C[Seki, White wins by one point (the prisoner) RIGHT]) (;W[db]CR[db]C[Seki, White wins by one point (the prisoner) RIGHT]) (;W[dd]CR[dd] ;B[cd]CR[cd] (;W[db]CR[db]C[Seki, White wins by one point (the prisoner) RIGHT]) (;W[bc]CR[bc] ;B[db]CR[db] ;W[dc]CR[dc]C[Black wins by one point!])) (;W[cd]CR[cd] ;B[dd]CR[dd] (;W[bc]CR[bc] ;B[db]CR[db]C[Black wins!]) (;W[db]CR[db] ;B[cd]CR[cd]C[Seki & Jigo!]))) (;B[ba]CR[ba] ;W[bc]CR[bc] ;B[cd]CR[cd] ;W[ca]CR[ca]C[White wins big!]) (;B[ca]CR[ca] ;W[ba]CR[ba]C[White wins!])) (;W[db]CR[db] ;B[ba]CR[ba] (;W[bc]CR[bc] ;B[ca]CR[ca] ;W[dc]CR[dc] ;B[cd]CR[cd]C[Seki!]) (;W[dc]CR[dc] ;B[ca]CR[ca]C[Seki & jigo!])) (;W[bc]CR[bc] ;B[db]CR[db] (;W[ca]CR[ca] ;B[dc]CR[dc] ;W[cd]CR[cd] ;B[dd]CR[dd]C[Seki, Black wins by one point (the prisoner)]) (;W[cd]CR[cd] ;B[dd]CR[dd] ;W[ca]CR[ca]C[Seki, Black wins by one point (the prisoner)]) (;W[dc]CR[dc] ;B[dd]CR[dd] ;W[ca]CR[ca]C[Seki, Black wins by one point (the prisoner)])))