(;GM[1]FF[4]SZ[19]
GN[even parity: white cannot kill]
PC[http://senseis.xmp.net/?ParitySeki]AP[GoWiki:2009]
DT[2010-11-24]
C[Diagram from http://senseis.xmp.net/?ParitySeki

even parity: white cannot kill]
PL[W]

AB[aa][ea][fa][bb][fb][cc][fc][dd][fd][ae][fe][af][bf][cf][df][ef][ff]
AW[ca][da][db][eb][ac][ec][ad][bd][ed][be][ce][de][ee]

;W[cb]C[W1]MN[1]
;B[bc]C[B2]MN[2]
;W[ba]C[W3]MN[3]
;B[ab]C[B4]MN[4]

;
)
