Please find the best result for White!
(japanese rules)
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[4]KM[0.00]
PW[Weiß]PB[Schwarz]AW[bc]AB[aa][ba][da][cc][dc][ad][cd][dd]C[White to play, what's his best result?]PL[W]
(;W[cb]CR[cb]
;B[bb]CR[bb]
;W[ac]CR[ac]
;B[ca]CR[ca]
;W[bd]CR[bd]
;B[db]CR[db]C[Seki & jigo! RIGHT])
(;W[bb]CR[bb]
;B[cb]CR[cb])
(;W[bd]CR[bd]
;B[bb]CR[bb]
;W[ac]CR[ac]
;B[ab]CR[ab]C[A nice position, but a loss for White :)])
(;W[ac]CR[ac]
;B[cb]CR[cb]C[White is lost]))