(;GM[1]FF[4]SZ[19]
GN[Invasion is possible]
PC[http://senseis.xmp.net/?CountingLesson1]AP[GoWiki:2009]
DT[2009-08-18]
C[Diagram from http://senseis.xmp.net/?CountingLesson1

Invasion is possible]
PL[W]

AB[cp][fq]
AW[hq]

;W[eq]C[W1]MN[1]
;B[dq]C[B2]MN[2]
;W[er]C[W3]MN[3]
;B[ep]C[B4]MN[4]
;W[fr]C[W5]MN[5]

;
)
