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

1 is wrong]
PL[B]

AB[dd][pd][cf][dj][pj][cn]
AW[db][fc][dp][op][qp][gq]

;B[cc]C[B1]MN[1]

;
)
