(;GM[1]FF[4]SZ[19]
GN[sliding boundary?]
PC[http://senseis.xmp.net/?FreeAndFixedBoundaries]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?FreeAndFixedBoundaries

sliding boundary?]
PL[W]

AB[jd][pd][pj][pp]
AW[dd][dj][dp]

;W[hc]C[W1]MN[1]
;B[he]C[B2]MN[2]
;W[fc]C[W3]MN[3]

;
)
