(;GM[1]FF[4]SZ[19]
GN[Comparison 1 (White follow up - W3 risking nothing, B4 surely not the first move, but finally it should be necessary.)]
PC[http://senseis.xmp.net/?WuRenGo2/White]AP[GoWiki:2009]
DT[2010-03-25]
C[Diagram from http://senseis.xmp.net/?WuRenGo2/White

Comparison 1 (White follow up - W3 risking nothing, B4 surely not the first move, but finally it should be necessary.)]
PL[W]

AB[dp][ep][bq][cq][eq][er]
AW[co][cp][dq][br][cr][dr][es]

;W[cs]C[W7]MN[7]
;B[fs]C[B8]MN[8]
;W[aq]C[W9]MN[9]
;B[fr]C[B10]MN[10]
;W[ds]C[W11]MN[11]

;
)
