(;GM[1]FF[4]SZ[19]
GN[The wedge is often a solution :)]
PC[http://senseis.xmp.net/?GokyoShumyoSection6Problem49/Attempts]AP[GoWiki:2009]
DT[2012-03-24]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection6Problem49/Attempts

The wedge is often a solution :)]
PL[B]

AB[ba][ab][cb][gb][bc][gc][cd][gd][id][be][ce][ge][ie][df][eg]
AW[eb][cc][fc][ic][jc][bd][kd][de][ee][fe][gf][hf][kf][fg][jg]

;B[ec]C[B1]MN[1]
;W[dc]C[W2]MN[2]
;B[ea]C[B3]MN[3]
;W[fa]C[W4]MN[4]
;B[fb]C[B5]MN[5]
;W[da]C[W6]MN[6]
;B[ed]C[B7]MN[7]
;W[dd]C[W8]MN[8]
;B[db]C[B9]MN[9]
;W[fd]C[W10]MN[10]

;
)
