(;GM[1]FF[4]SZ[19]
GN[Black sente]
PC[http://senseis.xmp.net/?TsumegoFromGames7/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?TsumegoFromGames7/Solution

Black sente]
PL[B]

AB[qh][lk][mk][nk][ok][ll][pl][ql][lm][qm][ln][nn][lo][no][qo][ro][lp][pp][qp][lq][jr][kr][lr][nr][or][rr]
AW[ol][mm][nm][pm][mn][pn][oo][po][op][rp][nq][oq][pq][qq][rq][pr]
LB[np:a][mq:b][rs:c]

;B[mo]C[B1]MN[1]
;W[os]C[W2]MN[2]
;B[mr]C[B3]MN[3]
;W[sr]C[W4]MN[4]

;LB[np:a][mq:b][rs:c]
)
