(;GM[1]FF[4]SZ[19]
GN[a1) Black alternative]
PC[http://senseis.xmp.net/?InvadingDeepEnough]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?InvadingDeepEnough

a1) Black alternative]
PL[W]

AB[dd][jd][cg]
AW[fc][fe]

;W[dc]C[W1]MN[1]
;B[cd]C[B2]MN[2]
;W[cc]C[W3]MN[3]

;
)
