(;GM[1]FF[4]SZ[19]
GN[Exercise 1: Alternate Solution]
PC[http://senseis.xmp.net/?PreventingEscapeOnTheFirstLine]AP[GoWiki:2009]
DT[2014-01-05]
C[Diagram from http://senseis.xmp.net/?PreventingEscapeOnTheFirstLine

Exercise 1: Alternate Solution]
PL[W]

AB[ea][ab][bb][cb][db]
AW[eb][bc][cc][dc][ec][be]
LB[ca:b]

;W[da]C[W1]MN[1]
;B[fa]C[B2]MN[2]
;W[gb]C[W3]MN[3]

;LB[ca:b]
)
