(;GM[1]FF[4]SZ[20:19]
GN[Easiest to understand]
PC[http://senseis.xmp.net/?PreventingEscapeOnTheFirstLine]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?PreventingEscapeOnTheFirstLine

Easiest to understand]
PL[W]

AB[ea][ab][bb][cb][db]
AW[ba][eb][bc][cc][dc][ec][be]
CR[ea]

;W[fb]C[W1]MN[1]
;B[fa]C[B2]MN[2]
;W[gb]C[W3]MN[3]
;B[ga]C[B4]MN[4]
;W[hb]C[W5]MN[5]
;B[ha]C[B6]MN[6]
;W[ib]C[W7]MN[7]
;B[ia]C[B8]MN[8]
;W[jb]C[W9]MN[9]
;B[ja]C[B10]MN[10]

;CR[ea]
)
