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