(;GM[1]FF[4]SZ[19]
GN[White fails to enclose black]
PC[http://senseis.xmp.net/?ElementaryCourse]AP[GoWiki:2009]
DT[2009-10-11]
C[Diagram from http://senseis.xmp.net/?ElementaryCourse

White fails to enclose black]
PL[B]

AB[jp][ir][jr]
AW[hp][kp][hq][kq][hr][kr]

;B[ip]C[B1]MN[1]
;W[jo]C[W2]MN[2]
;B[io]C[B3]MN[3]

;
)
