(;GM[1]FF[4]SZ[19]
GN[Counter attack]
PC[http://senseis.xmp.net/?ThicknessExample7]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?ThicknessExample7

Counter attack]
PL[W]

AB[gb][fc][jc][qc][cd][gd][ce][qe][cf][df][gf][hf][eg][ch][eh][bi][ci][di][ei][cn][qo][qp][fq][nq][pq]
AW[cc][dc][ec][lc][oc][bd][fd][de][ee][af][bf][ef][ff][ag][bg][cg][dg][gg][ah][bh][dh][qj][ck][pn][qn][po][dp]
LB[gh:a][ai:c][bk:b]

;W[ek]C[W1]MN[1]
;B[en]C[B2]MN[2]
;W[gj]C[W3]MN[3]

;LB[gh:a][ai:c][bk:b]
)
