(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[4]KM[0.00]
PW[Weiß]PB[Schwarz]AW[ab]AB[ba][da][db][ac][ad][bd]C[White to play - what's the best he can do?]PL[W]
(;W[cc]CR[cc]
;B[bb]CR[bb]
(;W[cb]CR[cb]
(;B[bc]CR[bc]
;W[ca]CR[ca]
;B[cd]CR[cd]
;W[dc]CR[dc]
;B[db]CR[db]C[Seki! White wins by 2 points - 3 prisoners against 1. RIGHT])
(;B[ca]CR[ca]
;W[bc]CR[bc]C[Black is dead]))
(;W[bc]CR[bc]
;B[aa]CR[aa]
(;W[cb]CR[cb]
;B[dc]CR[dc]
;W[cd]CR[cd]
;B[ca]CR[ca]
;W[ab]CR[ab]
;B[ac]CR[ac]C[Seki! White wins by 1 point, 3 prisoners against 2. This result is 1 point worse than Whites best result!])
(;W[cd]CR[cd]
(;B[cb]CR[cb]
;W[ab]CR[ab]
;B[ac]CR[ac]
;W[dc]CR[dc]C[Seki! White wins by 1 point, 3 prisoners against 2. This is 1 point worse than the best result! CHOICE])
(;B[dc]CR[dc]
;W[cb]CR[cb]
;B[ca]CR[ca]
;W[ab]CR[ab]
;B[ac]CR[ac]C[Seki! White wins by one point, 3 prisoners against 2. This is one point worse than the best result! CHOICE])))
(;W[dc]CR[dc]
;B[cb]CR[cb]C[White is lost]))
(;W[bc]CR[bc]
;B[cc]CR[cc]
(;W[bb]CR[bb]
;B[cd]CR[cd]C[White is lost])
(;W[cd]CR[cd]
;B[bb]CR[bb]C[White can't make an eye, so he is dead!]))
(;W[cd]CR[cd]
;B[bc]CR[bc]
;W[cc]CR[cc]
;B[bb]CR[bb]C[White can't do anything.....])
(;W[bb]CR[bb]
;B[cc]CR[cc]C[White is lost])
(;W[cb]CR[cb]
;B[cc]CR[cc]C[White is lost]))