(;GM[1]FF[4]SZ[19]
GN[Classical example of a probe]
PC[http://senseis.xmp.net/?Probe]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?Probe

Classical example of a probe]
PL[W]

AB[dc][ce]
LB[cb:c][eb:a][cc:d][ec:b]

;W[db]C[W1]MN[1]

;LB[cb:c][eb:a][cc:d][ec:b]
)
