(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[4]KM[0.00] PW[Weiß]PB[Schwarz]AW[ba][cb][dc]AB[da][bb][ac][bd][cd][dd]C[White to play - what's the best he can do?]PL[W] (;W[ab]CR[ab] (;B[aa]CR[aa] ;W[ca]CR[ca] (;B[ab]CR[ab] ;W[cc]CR[cc]C[With his next move, White will capture with D3, securing a jigo. RIGHT CHOICE]) (;B[cc]CR[cc] ;W[ab]CR[ab] ;B[db]CR[db] ;W[bc]CR[bc]C[White wins - BC2 was a mistake])) (;B[bc]CR[bc] (;W[ca]CR[ca] ;B[aa]CR[aa] ;W[db]CR[db] ;B[ab]CR[ab]C[Seki & Jigo! RIGHT CHOICE]) (;W[db]CR[db] ;B[aa]CR[aa] ;W[ca]CR[ca] ;B[ab]CR[ab]C[Seki & jigo! RIGHT CHOICE]) (;W[cc]CR[cc] ;B[aa]CR[aa]C[Black wins!]))) (;W[cc]CR[cc] ;B[ca]CR[ca] ;W[db]CR[db] ;B[ca]CR[ca]C[Black wins]) (;W[ca]CR[ca] ;B[cc]CR[cc] ;W[ab]CR[ab] ;B[aa]CR[aa]C[Black wins]))