(;GM[1]FF[4]SZ[19]
GN[Mistake 23]
PC[https://senseis.xmp.net/?DietersMistakesIn2021/Problem23]AP[GoWiki:2009]
DT[2022-01-24]
C[Diagram from https://senseis.xmp.net/?DietersMistakesIn2021/Problem23

Mistake 23]
PL[B]

AB[dc][lc][dd][od][pd][qd][ce][me][cf][cg][ch][pj][dk][kk][cn][do][nq]
AW[cc][nc][pc][qc][rc][cd][rd][be][bf][bg][qn][co][cp][pp][dq][fq][oq]
LB[jf:a][qf:c][kp:b]

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

;LB[jf:a][qf:c][kp:b]
)
