(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[9]KM[0.00]
PW[White]PB[Black]AW[ga][ha][ia][gb][hb][ib][bc][bd][cd][hd][id][ce][he][cf][ff][gf][hf][if][ag][bg][cg][eg][fg][ig][ah][ch][fh][gh][hh][bi][ci][gi][hi][ii]AB[fa][bb][fb][cc][dc][ec][fc][gc][hc][dd][gd][de][ee][fe][ge][df][dh][eh][di][ei]C[Black to play and win. No komi, no prisoners. (Hint: Play the best endgame)]
(;B[ic]CR[ic]
(;W[ab]CR[ab]
(;B[dg]CR[dg]
;W[cb]CR[cb]
(;B[db]CR[db]
;W[ba]CR[ba]
;B[da]CR[da]
;W[ca]CR[ca]C[RIGHT Black wins by a point. White A8 is usually sente, but not in this case.])
(;B[da]CR[da]
;W[ba]CR[ba]
;B[db]CR[db]
;W[ca]CR[ca]C[RIGHT Black wins by a point. White A8 is usually sente, but not in this case.]))
(;B[ba]CR[ba]
;W[dg]CR[dg]C[W+1])
(;B[cb]CR[cb]
;W[dg]CR[dg]
;B[ba]CR[ba]C[W+1])
(;B[ca]CR[ca]
;W[dg]CR[dg]
;B[ba]CR[ba]C[W+1]))
(;W[dg]CR[dg]
;B[ab]CR[ab]
;W[ac]CR[ac]C[RIGHT D3 was white's mistake which lost a point. B+2]))
(;B[ab]CR[ab]
;W[ic]CR[ic]
;B[dg]CR[dg]
;W[ac]CR[ac]C[W+1])
(;B[dg]CR[dg]
;W[ic]CR[ic]
;B[ab]CR[ab]
;W[ac]CR[ac]C[W+1])
(;B[ac]CR[ac]
;W[ic]CR[ic]
;B[dg]CR[dg]
;W[ab]CR[ab]
;B[aa]CR[aa]
;W[ad]CR[ad]
(;B[cb]CR[cb]
;W[ab]CR[ab]
;B[ba]CR[ba]
;W[ac]CR[ac]C[W+3])
(;B[ca]CR[ca]
;W[ab]CR[ab]
;B[ba]CR[ba]
;W[ac]CR[ac]C[W+3])
(;B[ba]CR[ba]
;W[ab]CR[ab]
(;B[cb]CR[cb]
;W[ac]CR[ac]C[W+3])
(;B[ca]CR[ca]
;W[ac]CR[ac]C[W+3W+3])
(;B[db]CR[db]
;W[ac]CR[ac]C[W+3])
(;B[da]CR[da]
;W[ac]CR[ac]C[W+3]))))