(;GM[1]FF[4]SZ[19]
GN[Wrong (iv), Changing B3 Refutation]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem2/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem2/Solution

Wrong (iv), Changing B3 Refutation]
PL[B]

AB[bp][cp][bq][cr]
AW[bo][co][dp][cq][dq][fq]

;B[dr]C[B1]MN[1]
;W[er]C[W2]MN[2]
;B[ar]C[B3]MN[3]
;W[bs]C[W4]MN[4]
;B[ap]C[B5]MN[5]
;W[br]C[W6]MN[6]

;
)
