(;GM[1]FF[4]SZ[19]
GN[Can White play ''a'' instead of 6?]
PC[http://senseis.xmp.net/?BQM5]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM5

Can White play ''a'' instead of 6?]
PL[B]

AB[qc][od][qj][en][pn][eo][ep][jp][qp][dq][oq][pq][nr][pr][os]
AW[dc][jc][de][cj][dm][dn][do][lo][oo][op][cq][nq][cr][mr]
LB[mp:a]

;B[mq]C[B1]MN[1]
;W[lq]C[W2]MN[2]
;B[np]C[B3]MN[3]
;W[no]C[W4]MN[4]
;B[lr]C[B5]MN[5]
;W[kq]C[W6]MN[6]

;LB[mp:a]
)
