(;GM[1]FF[4]SZ[19]
GN[Black to move]
PC[http://senseis.xmp.net/?GokyoSeimyoVolume3Problem93/Attempts]AP[GoWiki:2009]
DT[2009-12-28]
C[Diagram from http://senseis.xmp.net/?GokyoSeimyoVolume3Problem93/Attempts

Black to move]
PL[B]

AB[ql][qn][rn][oo][op][oq][qq][rq][nr][or][pr]
AW[qo][ro][pp][rp][pq][qr][rr][ps]
LB[qs:a]

;B[sq]C[B1]MN[1]
;W[sr]C[W2]MN[2]
;B[rs]C[B3]MN[3]

;LB[qs:a]
)
