(;GM[1]FF[4]SZ[19]
GN[Preparation]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem98/Solution]AP[GoWiki:2009]
DT[2023-02-02]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem98/Solution

Preparation]
PL[B]

AB[ga][ha][ka][la][bb][ib][lb][nb][qb][ic][lc][bd][cd][dd][fd][gd][kd][ld][qd][rd][be][de][ie][je][ke][pe][re][cf][of][pf][bg][ig][lg][mg][ng][og][ih][oh][qh][jj][dk][qk]
AW[ba][fa][ma][na][sa][eb][gb][hb][jb][kb][mb][rb][bc][cc][ec][hc][mc][nc][pc][sc][hd][pd][le][ne][qe][df][hf][if][kf][lf][nf][dg][fg][hg][rg][bh][ch][mh][nh][ki][oi][cj][ck][pk][rk][ql]
LB[gg:a][kh:b]

;B[he]C[B1]MN[1]
;W[ge]C[W2]MN[2]
;B[gf]C[B3]MN[3]
;W[fe]C[W4]MN[4]
;B[jf]C[B5]MN[5]
;W[jg]C[W6]MN[6]
;B[kg]C[B7]MN[7]
;W[jh]C[W8]MN[8]
;B[ii]C[B9]MN[9]
;W[ij]C[W10]MN[10]

;LB[gg:a][kh:b]
)
