(;GM[1]FF[4]SZ[17:19]
GN[Black plays first]
PC[http://senseis.xmp.net/?PickyEndgameProblem/Discussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?PickyEndgameProblem/Discussion

Black plays first]
PL[B]

AB[no][oo][po][qo][bp][cp][dp][ep][qp][cq][eq][pq][qq][br][er][or][cs][es]
AW[ao][bo][co][do][ap][mp][np][op][pp][aq][bq][mq][oq][cr][mr][pr][ms][ps]

;B[ar]C[B1]MN[1]
;W[nr]C[W2]MN[2]
;B[qr]C[B3]MN[3]

;
)
