(;GM[1]FF[4]SZ[19]
GN[Solution sequence.]
PC[http://senseis.xmp.net/?RetrogradeAnalysisProblem3/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RetrogradeAnalysisProblem3/Solution

Solution sequence.]
PL[B]

AB[lo][mo][no][po][ro][kp][np][nq][kr][nr]
AW[mp][mq][oq][pq][qq][rq][sq][mr][or][sr][ms][ns][ss]

;B[os]C[B5]MN[5]
;W[ps]C[W6]MN[6]
;B[qr]C[B7]MN[7]

;
)
