(;GM[1]FF[4]SZ[19]
GN[B1 saves black stones in the middle and W2 captures 18 stones.]
PC[http://senseis.xmp.net/?BiggestKnownEyeSpaceForWhichThereIsANakade/Solution4]AP[GoWiki:2009]
DT[2009-09-09]
C[Diagram from http://senseis.xmp.net/?BiggestKnownEyeSpaceForWhichThereIsANakade/Solution4

B1 saves black stones in the middle and W2 captures 18 stones.]
PL[B]

AB[ca][da][ea][fa][ga][ha][ia][ja][ka][la][ab][bb][db][eb][fb][ib][jb][mb][nb][ob][bc][dc][ec][gc][jc][bd][fd][gd][id][kd][md][ce][de][ie][ke][df][ff][if][kf][mf][dg][fg][gg][hg][ig][dh][kh][di][ei][fi][gi][hi][ii][ji][ki]
AW[ba][ma][na][cb][gb][hb][kb][lb][cc][hc][ic][kc][dd][ed][hd][jd][he][je][ef][hf][jf][eg][jg][eh][fh][gh][hh][ih][jh]

;B[ee]C[B1]MN[1]
;W[fc]C[W2]MN[2]

;
)
