(;GM[1]FF[4]SZ[19]
GN[Black swithches]
PC[http://senseis.xmp.net/?2005GoodwillRengo/Discussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?2005GoodwillRengo/Discussion

Black swithches]
PL[B]

AB[cb][dc][dd][ed][de][eg][ch][dh][ei][dj]
AW[bc][cc][gd][ce][ee][df][ef][cg][dg][eh]
CR[ce]

;B[gc]C[B1]MN[1]
;W[hc]C[W2]MN[2]
;B[cd]C[B3]MN[3]
;W[bd]C[W4]MN[4]
;B[be]C[B5]MN[5]
;W[bf]C[W6]MN[6]
;B[cf]C[B7]MN[7]

;CR[ce]
)
