(;GM[1]FF[4]SZ[19]
GN[Var 1]
PC[http://senseis.xmp.net/?GokyoShumyoSection1DerivedProblem56]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1DerivedProblem56

Var 1]
PL[W]

AB[ap][bp][cp][dp][ep][fp][cr]
AW[bn][cn][en][ao][fo][gp][bq][fq][er][gr]

;W[dr]C[W1]MN[1]
;B[br]C[B2]MN[2]
;W[cs]C[W3]MN[3]
;B[bs]C[B4]MN[4]

;
)
