(;GM[1]FF[4]SZ[19]
GN[Black descends]
PC[http://senseis.xmp.net/?RTGProblem6/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RTGProblem6/Solution

Black descends]
PL[B]

AB[nb][rb][sb][nc][qc][od][pd][qd]
AW[ma][mb][pb][mc][rc][sc][md][rd][ne][oe][pe][qe][re]

;B[qb]C[B1]MN[1]
;W[nd]C[W2]MN[2]
;B[na]C[B3]MN[3]
;W[oc]C[W4]MN[4]

;
)
