(;GM[1]FF[4]SZ[19]
GN[Ko lock (i)]
PC[http://senseis.xmp.net/?KoLock]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KoLock

Ko lock (i)]
PL[B]

AB[cd][hd][cg][dg][eh]
AW[ec][ef][eg][dh][dj]

;B[di]C[B1]MN[1]
;W[ei]C[W2]MN[2]
;B[ch]C[B3]MN[3]

;
)
